# Patent

## Title
Automated integration of content from multiple information stores using a mobile communication device

## Abstract

A system, device and method are provided for merging information from a plurality of network sources using a mobile device capable. The mobile device receives data of a first type from a first network source, then merges the received data with data of a different type stored at the mobile device to create a merged data set, the merging including matching an identifier associated with the received data against an identifier associated with the stored data. The merged data set is then merged with a data record at a different network source, this merging including matching an identifier associated with the merged data set against an identifier associated with the data record.

## Background
REFERENCE TO PRIOR APPLICATIONS
This application is a continuation of U.S. application Ser. No. 11/045,260, filed Jan. 31, 2005, which claims priority from European Patent Office Application No. 05100567.6, filed Jan. 28, 2005 (now European Patent No. 1 686 766), the entireties of which are incorporated herein by reference.


TECHNICAL FIELD
This invention relates generally to directories and databases for storing information on a computer network, and specifically to merging personal contact data from disparate information stores on a network using a mobile communication device.
TECHNICAL BACKGROUND
Current network architectures often contain a heterogenous mixture of information stores, including databases and directories. These information stores may contain personal and professional contact information, product information, certificates and public key data for authenticating users, network user account information, and other information necessary for maintaining a business or another enterprise. These disparate information stores may be stored on different servers in the network; a single information store, such as one accessed using the Lightweight Directory Access Protocol (LDAP), may reside on more than one server.
In practice, as information is added to one or more of these information stores, it is added on an ad hoc basis. The party entering information chooses an appropriate or available information store, depending on accessibility or authorization to use an information store, and enters the available information into the information store. For example, a directory entry may be created on one server to record a person's e-mail address and telephone number and, at another time, certificate information for that person might be added to a database. Later, that person's mobile number might be added to the previous directory, or to yet another directory or database within the same network.
In effect, identification information relating to a single user (certificates, telephone number, mobile number, e-mail addresses, mailing address, and other contact and authentication information) is split over multiple databases, directories, or servers. An example of the difficulty associated with storing identification information in such a way occurs when a user with a mobile communication device seeks to send secure electronic mail to a recipient within the same organization. The sender will be required to retrieve the recipient's e-mail contact information from the organization's LDAP server, and to also retrieve, in a separate step, the recipient's certificate information from a separate certificate store. Where the communication device stores such information in a personal information store, the single information store will have, as a result of the two separate information retrieval steps, two separate directory entries for the recipient: one for the e-mail contact information, and one for the certificate. The separate storage of the individual information on the network is replicated on the communication device.
As is indicated above, while a collection of individual information may be available on a single network, it is typically not all available to a user in a coherent format. A solution to this is to merge the information. However, the differing infrastructures of the different information stores mean that a simple merge is not possible. To merge such disparate individual information on a network typically requires a server-based system that will carry out a separate process in which all information stores are queried for information that relates to selected user identities. Such a system will then request user input to determine how to merge the located information. This approach to merging the individual information on the network includes a potentially high network overhead as well as disruptive and time-consuming user interaction while the merge is being carried out.
Accordingly, it is desirable to provide a system and method for merging the content of two or more individual information stores on a network. It is furthermore desirable to provide an automated and efficient manner of providing individual information to a mobile communication device for storage in a personal information store.



BRIEF DESCRIPTION OF THE DRAWINGS
In drawings which illustrate by way of example only a preferred embodiment of the invention,
FIG. 1 is a block diagram of a network topology employing the system and method for merging content from two information stores.
FIG. 2 is a block diagram of a personal address book information store and a public key certificate retrieved from a second information store.
FIG. 3 is a flow diagram showing a method for merging information from two information stores.
FIG. 4 is a further embodiment of a method for merging information from two information stores.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1, a simplified exemplary network topology supporting an embodiment of the invention is shown. A corporate network a server 10 is provided, which in the example of the preferred embodiment provides the functionality of a host server, a message server, and a directory server such as a LDAP server. The functions of the server may be provided by a plurality of servers, rather than the single server 10 illustrated in this embodiment. In communication with the server 10 are at least one desktop system 20 (a user terminal or other network access point may also be in communication with the server 10). The server 10 also has a connection 100 to the Internet 110. A wireless gateway and infrastructure 120, 130 between the Internet 110 and a wireless network 140 provides access to the corporate network by one or more mobile data communication devices 30, such as a personal digital assistant or other wireless handheld communication device. Alternatively, a mobile data communication device 30 may communicate with the corporate network in another manner, for example, over the wireless network 140 with a wireless virtual private network router (not shown), thus bypassing the wireless gateway 120.
The user desktop system 20 may be provided with a wireless communication port, universal serial bus (USB) cradle or other fixed-link connection for use in transmitting information between the desktop system 20 and the mobile communication device 30 when it is in the proximity of the desktop system.
Preferably, the corporate network server 10 also comprises a certificate management system, a contact information database accessible using the LDAP server, and a network user account directory. As a person skilled in the art will appreciate, the topology of the network depicted in FIG. 1 is only a simple example; additional servers, information stores and other services may be incorporated as required, and any appropriate protocols may be used to access and transmit data. For example, the certificate management system may reside on an external, publicly accessible server, accessible by the mobile communication device 30 via the Internet. In the present embodiment, however, there are at least two disparate information stores: the certificate management system and the contact information database. Preferably, the contact information database is served from an LDAP server, such as the Microsoft® Active Directory/Exchange server, or using any other appropriate protocol. The certificate management system is preferably managed using a product such as the Entrust® public key infrastructure (PKI). In the preferred embodiment, the contact information database provided on the LDAP server comprises a global address list (GAL), the contents of which are accessible to all users of the corporate network.
The mobile communication device 30 is preferably a two-way communication device having voice and data communication capabilities, provided with a transceiver, a microprocessor, memory comprising non-volatile memory and random access memory, and other device subsystems (not shown) including a display, one or more auxiliary input/output devices, a serial port, a keyboard, a speaker, a microphone, and a short-range wireless communications subsystem. Thus, for example, the mobile device 30 may communicate over a voice network, such as an analog or digital cellular network, and may also communicate over a data network. These voice and data networks may be separate communication networks using separate infrastructure, such as base stations, network controllers, etc., or they may be integrated into a single wireless network.
High-level communication applications, such as data communication applications, may be stored in memory for execution by the microprocessor of the mobile communication device 30. The data communication application may be used, for example, to send and receive data such as e-mail messages, files, organizer information, and short text messages between the mobile device and a plurality of other data devices. The mobile communication device 30 is further provided with an address book application, the functionality of which is described in greater detail below.
The mobile communication device 30 may be synchronized with the corporate network server 10 by placing the device 30 in a cradle (not shown), which couples the serial port of the device 30 to the serial port of the desktop computer system 20. Interfaces for other wired download paths may be provided in the mobile communication device 30, in addition to or instead of the serial port. For example, a USB port would provide an interface to a similarly equipped personal computer 20.
An address book application, for use with data or voice communications, in particular e-mail messaging, is preferably stored in the non-volatile memory of the mobile communication device 30. Referring to FIG. 2, the device 30 is also provided with a contact database, which is a personal information store and is referred to as a personal address book 200. In the embodiment described, personal address book 200 may be stored in either volatile or non-volatile memory. The personal address book 200 is intended to be populated with a number of records containing contact information for potential recipients of communications from the user of the mobile communication device 30. Each record of the personal address book 200 comprises a set of attributes and values. In FIG. 2, for example, the first record 210 of the fragment of personal address book 200 shown comprises attributes name 220a, mail 220b, business_phone 220c, street_address 220d, organization_name 220e, and user_certificate 220f. Each of those attributes may be provided with a corresponding value, such as the name value 230a and mail address value 230b. Not all attributes may be provided with a corresponding value.
The data used to populate the personal address book 200 may have been entered by the user directly into the mobile communication device 30. Alternatively, it may have been downloaded from the global address list provided on the LDAP server on the corporate network upon request by the user when the communication device 30 is connected to the serial port of the desktop computer 20. The personal address book 200 may also be populated using other methods known in the art, including, but not limited to entering the data manually, by synchronizing with the desktop computer 20 over a local USB connection or a local wireless connection (using a protocol such as Bluetooth, for example), or wireless synchronization with the corporate network server 10. Thus, it will be appreciated that at least a portion of the data populating the personal address book 200 may be a subset of the data contained in the global address list.
The information in the personal information store (personal address book 200) on the communications device 30 is obtained in the course of the device being used to carry out communications. Applications executable on the device 30 permit requests to be made for information available on networks accessible by the device. In response to such requests, communication information is received that is stored in the personal information store (personal address book 200) on communications device 30. As is described below, such a request may be made for a security certificate stored in an information store on an accessible network.
The description of the preferred embodiment refers to enterprise information stores. It will be understood that such information stores include those that may be maintained at server 10 or desktop system 20 and may also include information stores that are remotely accessible as part of the operation of the enterprise (for example a certificate authority). The communication information accessed by mobile communication device 30 is broadly defined to include information that is usable in mobile communication device 30 carrying out its functions,
The preferred embodiment of the system and method for integrating communication information from different enterprise information stores will now be described in relation to FIGS. 2 through 4. When the user of the mobile communication device 30 wishes to transmit a secure message via e-mail to a recipient, the device user retrieves via the wireless network 140 a public key certificate 300 from the certificate management system on the corporate server 10. As depicted in FIG. 2, the public key certificate 300 includes public key 310, subject 320 (such as the name of the individual holding the certificate, an e-mail address, a computer, or an organization), a validity period 330 (during which period of time the certificate is deemed to be valid, unless it is revoked), a location for a revocation centre 340 (used to determine if the certificate 300 had been revoked), and a serial number 345.
Where information is provided to mobile communication device 30 in response to a request made in the process of carrying out a communication operation, it is possible for the address book application executing on the device to store a separate, new record for the recipient, consisting only of the public key certificate and an associated e-mail address, in the address book 200 (personal information store) of the communication device 30.
However, in the preferred embodiment, the address book application avoids replicating the separate storage of individual information. The address book application seeks to add the received certificate information to an existing record stored in the address book of device 30. This is carried out by the address book application querying the personal address book 200 using techniques known in the art for information that relates to the received certificate information. Preferably, a corresponding record in the address book 200 is located using a principal identifier 350 obtained from the certificate 300. The principal identifier 350 is preferably an attribute with a value that is known to be suitable for unique identification of a user or recipient within the scope of the personal address book 200. As will be understood by a person skilled in the art, the query of the personal address book 200 may be accomplished by comparing the principal identifier of the received certificate information to the fields contained in the records of the personal address book 200. Such a query may result in a plurality of potential candidates for matches in the personal address book 200, which may be further refined by heuristics provided within the address book application or by allowing the user to select the appropriate matching personal address book entry 200.
In the example of FIG. 2, the principal identifier 350 is a subfield in the “subject” identifier, as shown (specified as the user e-mail address 320 associated with the certificate). E-mail addresses are generally considered suitable as principal identifiers in the art because they are typically unique to each individual or organization, and are usually readily available from the personal address book 200. Persons skilled in the art will recognized that other attributes may also be suitable for use as a principal identifier; for example, in the Microsoft Outlook® product, each database entry has a unique common name, and therefore the name attribute 220a may be used to uniquely identify a user or recipient in the personal address book 200. The personal address book application may be configured with a heuristic function that allows the personal address book 200 to be queried for variances of the principal identifier, for example variances in case or the use of a nickname or a common variant of a proper name (e.g., “Bob” instead of “Robert”).
If the query by the address book application successfully locates an entry in the personal address book 200 having a mail attribute value equal to the value of the principal identifier 350, then certain information from the certificate is copied to the corresponding record in the personal address book 200, resulting in merged record 210′. If the query does not locate such an entry, then a new entry is created in the personal address book 200 containing the certificate information. Thus, creation of multiple entries for the same recipient on the mobile communication device 30 is avoided.
The method for integrating the retrieved certificate 300 with the existing address book 200 on the communication device 30 is shown in the flow diagram of FIG. 3. At step 400, a certificate is received from a first information store, such as the certificate management system. At step 410, the personal address book 200 residing in memory in the mobile communication device 30 is queried using the key identifier. If the key identifier is located in the personal address book 200, then the certificate information is added at step 420 as a value for the user_certificate attribute in the existing personal address book record 210, forming merged record 210′. If the principal identifier is not found, then a new record is added to the personal address book 200 comprising only the information retrieved with the certificate 300 at step 430. The data from the server 10 and the personal address book 200 is thus merged, creating a rich information store without a duplicate address book entry on the mobile communication device 30.
The above describes how the data from the two different information stores was reconciled in the mobile communication device 30 to provide coherent data and to avoid the duplication of separate information storage in the personal information store of device 30. However, carrying out such steps in storing information on the device 30 does not ensure that the information stores resident on the server 10 are similarly merged. The global address list on the server 10, for example, may comprise an entry for a user or recipient that does not include certificate information, although certificate information for that individual is available via the certificate management system on the server 10, or from an external certificate store accessible to the mobile communication device 30 via the Internet. Therefore, in a preferred embodiment, once the data in the personal address book 200 on the mobile device 30 has been merged with the downloaded certificate 300, a flag 250 associated with the merged address book record 210′ is set to indicate the record's newly merged status. When the mobile device 30 is being synchronized with the server 10 via the fixed-link connection between the desktop system 20 and the mobile communication device 30, the synchronizing utility running on the mobile device 30 may upload the merged record 210′ from mobile device 30 to a personal address book resident on the desktop system 20. Preferably, in turn a synchronization utility running on the network or on the desktop system 20 similarly merges the newly-synchronized personal address book resident on the desktop system 20 with the global address list on the server 10. In a further embodiment, if the mobile device 30 is not connected to the desktop system 20, the synchronization utility may be configured to operate over the wireless network 140 between the device 30 and the network server 10, bypassing the desktop system 20.
As described above, individual information is obtained by communication device 30 from information stores on the server as part of its communication process. This information is then added to the personal information store in communication device 30 in a coherent manner. The synchronization step is then utilized to effectively merge individual information on the server 10 by uploading the combined information from the communication device 30 to the information stores on the accessible network.
As shown in FIG. 4, once the merged record 210′ has been created, at step 440 the flag 250 is set to indicate that the record 210′ contains new information, and at step 450 the updated values of the record 210′ are uploaded to the server 10 and merged with the global address list in a similar manner to that used on the mobile device 30. For example, the synchronizing utility will query the global address list for a matching principal identifier 350. Once the record 210′ has been merged with the global address list, the corresponding flag 250 is reset at step 460.
Thus, the system accomplishes not only a merger of data from disparate information stores on the mobile communication device 30, but also allows for incremental synchronization of the disparate information stores on the server 10 itself, using the merged records 210′ created on the mobile communication device 30. When a plurality of mobile communication devices 30, each individually practising the method of creating merged records 210′, each communicate with the server 10 to merge their respective merged records 210′ with the global address list resident on the network 10, the process of merging and updating the global address list is thus distributed among a number of devices similar to that shown by example as device 30. It is not necessary for the server 10 to perform a server-based merging process, with the attendant use of server resources, to consolidate disparate information store entries. In a preferred embodiment, only those flagged, merged records 210′ are utilized in this synchronization process, although in an alternate embodiment the entire personal address book 200 may be uploaded and used to synchronize the information stores on the server 10. Preferably, if the personal address book 200 comprises entries flagged as “private”, as is known in the art, those entries may be excluded from this synchronization process so that private address book entries are not shared on the global address list.
Further, the updating of server data may be carried out without waiting until the mobile device 30 is being synched with the server 10. The data communication between the mobile device 30 and the server 10 may take place at any time over the wireless network 140 and the Internet 110, preferably when the cost of air time for wireless data communication is inexpensive, particularly if the personal address book 200 is large.
It will be appreciated that in order to achieve this synchronization and updating of information stores, the user of the mobile device 30 will have adequate permissions on the server 10 to update the global address list. As the communication between the mobile device 30 and the server 10 is preferably undertaken only with transport encryption, the synchronization procedure is secure.
Preferably, the address book application on the mobile device 30, when importing certificates 300 from a source other than the server 10, also verifies the serial number 345 against any certificates listed in the global address book or the certificate management system on the server 10 during synchronization. Since it is possible for a single user or recipient to have multiple certificates 300, the system and method described above allow additional certificates 300 to be recorded in the global address list on the server 10.
Accordingly, there is provided a system for merging information from a plurality of enterprise information stores on a network for storing communication information, the system comprising a mobile communication device for accessing the network. The mobile communication device comprises a personal information store used in carrying out the communication function of the mobile communication device and program code operative to request communication information from the plurality of enterprise information stores as part of the communication function of the mobile communication device and, upon receipt of the requested information, to merge the received communication information with related information present in the personal information store in the mobile communication device to create a merged data set and to upload the merged data set to the one of the plurality of enterprise information stores.
A further aspect of the system provides that the information in at least one of the plurality of enterprise information stores on the network is stored in association with a principal identifier and that the information in the personal information store is stored in association with the principal identifier, and that the program code is further operative on receipt of enterprise information having an associated principal identifier value from the plurality of information stores to query the personal information store for information having a principal identifier value matching the principal identifier value for the received information.
A method for merging contact information is further provided, comprising the steps of providing a plurality of enterprise information stores on a network, providing a mobile communication device configured to provide communication functions and capable of accessing the enterprise information stores on the network, providing on the mobile communication device a personal contact information store for use in association with the communication functions of the device, requesting, using the mobile communication device, contact information from the plurality of enterprise information stores as part of the communication functions of the mobile communication device, receiving, using the mobile communication device, the requested contact information, merging, using the mobile communication device, the received contact information with related information present in the personal contact information store in the mobile communication device to create a merged data set; and uploading, using the mobile communication device, the merged data set to the one of the plurality of enterprise information stores. In a further embodiment, the method further provides the steps of identifying at least one principal identifier having a first value, the principal identifier being associated with the received contact information and with the personal contact information store, and querying the personal contact information store for a principal identifier having a value matching the first value.
A method is further provided for merging contact information from disparate enterprise information stores on a network using a mobile communication device, the mobile communication device being configured to provide a communication function and comprising a personal contact information store for use in association with the communication function, the method comprising the steps of requesting, using the mobile communication device, contact information from at least one of the disparate enterprise information stores, receiving, using the mobile communication device, the requested contact information, merging, using the mobile communication device, the received contact information with related information present in the personal contact information store in the mobile communication device to create a merged data set; and uploading, using the mobile communication device, the merged data set to at least one of the disparate enterprise information stores. In a further aspect, the method also provides the steps of identifying at least one principal identifier with a first value, the principal identifier being associated with the received contact information and with the personal contact information store, and prior to the step of merging, querying the personal contact information store for a principal identifier having a value matching the first value.
There is also provided a method, comprising: receiving, at a mobile device, data of a first type from a first network source; merging the received data with data of a different type stored at the mobile device to create a merged data set, the merging including matching an identifier associated with the received data against an identifier associated with the stored data; and merging the merged data set with a data record at a different network source, the merging including matching an identifier associated with the merged data set against an identifier associated with the data record.
In one aspect, the received data and the stored data are merged when the identifier associated with the received data matches the identifier associated with the stored data.
In another aspect, merging the received data with the stored data comprises copying the received data into a record comprising the stored data, the merged data set thus comprising the record.
In still another aspect, the method comprises setting a flag indicating that the record comprises a merged data set.
In a further aspect, wherein the identifier associated with the received data comprises a first attribute of the received data having a first value, and the identifier associated with the stored data comprises a different attribute of the stored data having a value matching the first value.
In yet a further aspect, the first value comprises either a name or an address.
Still further, merging the merged data set with the data record may comprise initiating a synchronization procedure at the mobile device.
In another aspect, the data of the first type comprises a digital certificate, and the data of the different type comprises an address book record.
Furthermore, the identifier associated with the stored data may comprise a first attribute of the stored data having a corresponding value, and the identifier associated with the data record may comprise a second attribute of the data record different from the first attribute.
There is also provided a method, comprising maintaining, in a data store of a communication device, a plurality of data items of a first type including a first data item, each of the plurality of data items being associated with a corresponding identifier relating to a first attribute of the plurality of data items; receiving, by the communication device, a second data item of a second type different from the first type, the second data item being associated with a second identifier relating to a second attribute different from the first attribute; determining whether the second identifier matches any of the identifiers corresponding to the plurality of data items; when the second identifier matches the identifier of the first data item, merging the second data item with the first data item and storing the merged first data item at the communication device; when the second identifier does not match any of the identifiers, storing a new data item of the first type comprising the second data item; and providing the merged first data item for updating, in a remote data store, a remote data item corresponding to the merged first data item as determined by matching identifiers of the merged first data item and the remote data item.
In one aspect, the method further comprises the communication device, prior to providing the merged first data item for updating: receiving a further data item of the second type; determining that a further identifier of the further data item matches the identifier of the merged first data item; further merging the further data item with the merged first data item, such that the merged first data item provided for updating the remote data item includes the further data item.
There is also provided a mobile device, which can include the features described above, such as at least one communications subsystem, a data store, and at least one processor, where the at least one processor configured to enable the method and variations described herein.
Various embodiments of the present invention having been thus described in detail by way of example, it will be apparent to those skilled in the art that variations and modifications may be made without departing from the invention. The invention includes all such variations and modifications as fall within the scope of the appended claims.

## Claims

1. A method implemented by a mobile device having stored thereon a set of address book records, each address book record having a set of attributes, wherein a remote server stores a plurality of address book records including a copy of the set of address book records stored on the mobile device, the method comprising:
receiving, at the mobile device, a digital certificate from a first network source different from the remote server, the received digital certificate having attributes including a principal identifier, the digital certificate including one or more attributes different than attributes of the plurality of address book records;
matching, by the mobile device, the principal identifier with a value of an attribute in one of the address book records;
merging the received digital certificate with the matched address book record stored at the mobile device to create a merged address book record, wherein merging includes copying one or more attributes from the received digital certificate into an empty field of the matched address book record, and wherein the copied one or more attributes are non-existent in the matched address book record prior to the copying; and
transmitting the merged address book record that was created at the mobile device to the remote server to update the plurality of address book records at the remote server with the merged address book record.

2. The method of claim 1, further comprising setting a flag indicating that the merged address book record has been modified.

3. The method of claim 1, wherein the principal identifier comprises an attribute of the received digital certificate having a first value, and the attribute associated with the matched address book record comprises a different attribute of the stored address book record having a value matching the first value.

4. The method of claim 3, wherein the first value comprises either a name or an address.

5. The method of claim 1, wherein transmitting comprises initiating a synchronization procedure at the mobile device.

6. The method claimed in claim 1, wherein the remote server comprises a lightweight directory access protocol server and wherein the plurality of address book records at the remote server comprises a global address list.

7. The method of claim 1, wherein attributes of the plurality of address book records include at least one of a name, electronic mail address, business phone number, or organization name.

8. The method of claim 1, wherein attributes of the digital certificate include at least one of a public key, principal identifier, serial number, or validity period.

9. A mobile device, including:
at least one communications subsystem;
a data store having stored thereon a set of address book records, each address book record having a set of attributes, wherein a remote server stores a plurality of address book records including a copy of the set of address book records stored on the mobile device; and
at least one processor configured to enable:
receiving, using the at least one communications subsystem, a digital certificate from a first network source different from the remote server, the received digital certificate having attributes including a principal identifier, the digital certificate including one or more attributes different than attributes of the plurality of address book records;
matching, by the mobile device, the principal identifier with a value of an attribute in one of the address book records;
merging the received digital certificate with the matched address book record stored at the mobile device to create a merged address book record, wherein merging includes copying one or more attributes from the received digital certificate into an empty field of the matched address book record, and wherein the copied one or more attributes are non-existent in the matched address book record prior to the copying; and
transmitting the merged address book record that was created at the mobile device to the remote server to update the plurality of address book records at the remote server with the merged address book record.

10. The mobile device of claim 9, further comprising setting a flag indicating that the merged address book record has been modified.

11. The mobile device of claim 9, wherein the principal identifier comprises an attribute of the received digital certificate having a first value, and the attribute associated with the matched address book record comprises a different attribute of the stored address book record having a value matching the first value.

12. The mobile device of claim 11, wherein the first value comprises either a name or an address.

13. The mobile device of claim 9, wherein the at least one processor is configured to transmit the merged data record by initiating a synchronization procedure.

14. The mobile device of claim 9, wherein attributes of the address book records include at least one of a name, electronic mail address, business phone number, or organization name.

15. The mobile device of claim 9, wherein attributes of the digital certificate include at least one of a public key, principal identifier, serial number, or validity period.

16. A method implemented by a wireless handheld communication device, comprising:
maintaining, in a data store of the communication device, a plurality of data items of a first type including a first data item, each of the plurality of data items having a respective identifier relating to a first attribute of the plurality of data items;
receiving, by the communication device, a second data item of a second type different from the first type, the second data item being associated with a second identifier relating to a second attribute different from the first attribute;
determining whether the second identifier matches any of the respective identifiers of the plurality of data items;
when the second identifier matches the respective identifier of the first data item, merging the second data item with the first data item and storing the merged first data item at the communication device, wherein merging includes copying one or more attributes from the second data item of the second type to the first data item of the first type, and wherein the copied one or more attributes are non-existent in the first data item prior to the copying;
when the second identifier does not match any of the respective identifiers, storing a new data item of the first type comprising the second data item; and
providing the merged first data item that was created based on merging the second data item with the first data item for updating, in a remote data store, a remote data item corresponding to the merged first data item as determined by matching identifiers of the merged first data item and the remote data item,
wherein the data item of the second type comprises a public key certificate for encrypting communications with an individual associated with the data item of the second type, and wherein a matched first data item comprises contact information for the individual.

17. The method of claim 16, further comprising the communication device, prior to providing the merged first data item for updating:
receiving a further data item of the second type;
determining that a further identifier of the further data item matches the identifier of the merged first data item;
further merging the further data item with the merged first data item,
such that the merged first data item provided for updating the remote data item includes the further data item.