Abstract:
A login system is adapted to be connected to a network for logging in a plurality of servers connected to the network. A reception processor is operable to receive a designation of at least two of the servers and a password from a user. A login processor is operable to automatically execute a login processing with respect to at least one of the designated servers for which the received password is valid.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a login system and a login method. Specifically, the present invention relates to a system and a method for logging in at least one of a plurality of servers connected to a network. 
     For example, Japanese Patent Publication No. 2002-183094A discloses as a login system in which an encrypted password is used so that login a plurality of servers is achieved. In this system, when a client computer logs in a specific server by inputting a user ID and a password, the server encrypts the user ID and the password used for the login, and then transmits them to the client computer. When the client computer should login another server, the client computer transmits the encrypted user ID and password having been received, to the server to be logged in. Thus, the other server decrypts the encrypted user ID and password, and thereby executes login processing. 
     Nevertheless, in the above-mentioned login system, the client computer needs to login a specific server initially, while another server needs to have relevance to the specific server. Further, the specific server needs to perform encryption processing for the user ID and password, while the other server needs to perform decryption processing for the encrypted user ID and password. 
     SUMMARY OF THE INVENTION 
     It is therefore an object of the invention to provide a login system and a login method capable of realizing easy login with respect to a plurality of servers connected to a network, without using encryption processing and decryption processing. 
     In order to achieve the above object, according to the invention, there is provided a login system, adapted to be connected to a network for logging in a plurality of servers connected to the network, the login system comprising: 
     a reception processor, operable to receive a designation of at least two of the servers and a password from a user; and 
     a login processor, operable to automatically execute a login processing with respect to at least one of the designated servers for which the received password is valid. 
     With this configuration, the login with respect to the designated servers can be easily achieved. Further, a plurality of the servers need not have specific relevance to each other. 
     The login system may further comprise a display operable to display a text and an image. Here, the reception processor is operable to cause the display to display a list of the servers from which the at least two servers are designated, and a text box to which the password is inputted. 
     With this configuration, the server designation and the password input can be facilitated. 
     The login processor may cause the display to display an indicator next to the at least one of the designated servers, thereby indicating that the login processing is successfully executed with respect to the at least one of the designated servers. 
     With this configuration, the user is notified of servers to which login has been successful and servers to which login has been unsuccessful among the designated servers. 
     The login processor may be operable to activate the reception processor to receive another password with respect to at least one of the designated servers that the login processing is not successfully executed. 
     With this configuration, login can be performed with respect to remaining one by inputting a different password by selecting servers to be logged into using the different password. 
     The login processor may be operable to repeat the activation of the reception processor until a termination requirement is satisfied. 
     Here, the termination requirement may be that login all of a plurality of the servers has been successful or alternatively that the operator performs a termination operation. 
     Alternatively, the termination requirement may be that an instruction for terminating the login processing is issued from the user. 
     According to the invention, there is also provided a method of logging in a plurality of servers connected to a network, comprising: 
     receiving a designation of at least two of the servers and a password from a user; and 
     executing automatically a login processing with respect to at least one of the designated servers for which the received password is valid. 
     According to the invention, there is also provided a program product comprising a computer program operable to cause a computer to execute the above method. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above objects and advantages of the present invention will become more apparent by describing in detail preferred exemplary embodiments thereof with reference to the accompanying drawings, wherein: 
         FIG. 1  is a diagram showing a client computer installed with a login program according to one embodiment of the invention and servers which are connected to a network; 
         FIG. 2  is a flowchart showing a login processing executed by the login program; and 
         FIGS. 3 to 5  are views showing examples of a login screen displayed in the client computer. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Embodiments of the invention will be described below in detail with reference to the accompanying drawings. 
     As shown in  FIG. 1 , a client computer  20  in which a login program  30  is installed is connected to a network  10 . The login program  30  installed in the client computer  20  includes: a selection receiving module  32  for displaying a login screen and then receiving the selection of servers to be logged in among a plurality of servers  12 - 18  connected to the network  10  and the input of a login password; a login executing module  34  for sequentially executing login processing to the selected servers using the inputted password; and a repeat terminating module  36  for causing the selection receiving module  32  and the login executing module  34  to repeatedly execute until a termination requirement is satisfied that a termination operation is performed by an operator or alternatively that login all the servers  12 - 18  connected to the network  10  has been achieved. 
     Next, login processing is described below that is performed by the client computer  20  when the login program  30  of the embodiment is executed with reference to  FIG. 2 . When the login processing is executed, first, all the servers  12 - 18  connected to the network  10  are searched and displayed on a login screen (step S 100 ) as shown in  FIG. 3 . Then, reception processing is performed for the selection of servers and the input of a password provided from an operator (step S 110 ). In this embodiment, a list of the server names, the MAC addresses, and the IP addresses of all the servers connected to the network  10  is displayed under the explanatory note of the login screen (in the center of the login screen). Under the list, displayed are an input field for password, a “select all” button, an “finish” button, an “OK” button, a “cancel” button, etc. Using a pointing device such as a mouse, an operator reverses (the display of) one or a plurality of desired servers and thereby selects servers to be logged into. Then, using a keyboard, the operator inputs a password into the input field for password.  FIG. 4  shows this state. Here, the operator can cancel the selection of a server or servers having already been selected, when the reversed display is canceled using the pointing device. Further, as for the selection of servers, when the “select all” button is operated using the pointing device, etc., all the servers can be selected. 
     Then, in the state that the servers have been selected while the password has been inputted, when the “OK” button or the “finish” button is operated, the button having been operated is determined (step S 120 ). When the “OK” button has been operated, login processing is executed for the next server in the sequence (the first server initially) among the selected servers by using the inputted password (step S 130 ). Then, it is determined whether login has been successful (step S 140 ). Whether the login has been successful is determined on the basis of a response from the server to which login processing is executed. Then, when the login is successful, a green lamp indicating successful login is turned on in the left side of the name of the successfully-logged-in server in the login screen (step S 150 ), while the reversed display in the login screen is changed into normal display. Here, when login is unsuccessful, the green lamp is not turned on, while the reversed display is not changed into normal display. 
     Then, it is determined whether any next server is present in the sequence, that is, whether any server to which login processing is not yet performed is present among the selected servers (step S 160 ). When the next server is present, the procedure returns to the login processing of step S 130  for the next server. When no next server is present, it is determined whether login has been successful to all the servers connected to the network  10  (step S 170 ). When any server to which login has been unsuccessful is present, the procedure returns to the reception processing for the selection of servers and the input of a password at step S 110 . When login has been successful to all the servers connected to the network  10 , termination processing is executed such as the canceling of the display of the login screen (step S 180 ), so that the login processing is terminated. 
     Supposing a case where the login password is common to the server  12  and the server  16  while the login password to the server  14  and the server  18  differs from the login password to the server  12  and the server  16 , that is, for example, when the login password to the server  12  and the server  16  is “AAA” while the login password to the server  14  and the server  18  is “BBB,” a case is considered below that the servers  12 - 18  are selected while “AAA” is inputted to the input field for password and that the “OK” button is then operated, login becomes successful for the server  12  and the server  16 , so that a green lamp is turned on in the left side of each of the server names of the server  12  and the server  16  in the login screen while the reversed display for the server  12  and the server  16  is changed into normal display. On the other hand, since the login password for the server  14  and the server  18  is not “AAA,” login becomes unsuccessful. Thus, a green lamp is not turned on in the left side of each of the server names of the server  14  and the server  18  in the login screen, while the reversed display for the server  14  and the server  18  is maintained intact in that state.  FIG. 5  shows this state. 
     Here, the server  14  and the server  18  to which login using the password “AAA” has been unsuccessful are selected, while no input is yet provided to the input field for password. Thus, when the operator inputs “BBB” into the input field for password in this state and then operates the “OK” button, the processing of steps S 130 -S 160  is repeatedly performed in a state that the server  14  and the server  18  are selected. Thus, the login with respect to the server  14  and the server  18  becomes successful. Accordingly, a green lamp is turned on in the left side of each of the server names of the server  14  and the server  18  in the login screen, while the reversed display for the server  14  and the server  18  is changed into normal display. Here, in the state of  FIG. 5 , the operator may select an additional server, or alternatively may cancel the selection of an already selected server. 
     In any one of a state that no server is selected while no password is inputted in the login screen, a state that a server is selected but a password is not yet inputted, and a state that a server is selected while a password is inputted, when the “finish” button is operated, termination processing such as canceling of the display of the login screen is executed intact in that state (step S 180 ), so that the login processing is terminated. For example, when the “finish” button is operated in the state of  FIG. 5 , the login processing is terminated in a state that login is achieved for the server  12  and the server  16  while login is not achieved for the other servers. 
     According to the login program  30  of the embodiment described above, when a plurality of desired servers are selected from a plurality of servers connected to the network  10  while a password is inputted and while and the “OK” button is then simply operated, login can automatically be executed (achieved) to servers having a login password in agreement with the inputted password, among the selected servers. Further, for each server to which login has been successful, a green lamp is turned on in the left side of the corresponding server in the login screen. This allows the operator to be notified of servers to which login has been successful and servers to which login has been unsuccessful. Further, as for the servers to which login has been unsuccessful among the selected servers, login processing can be executed in a state that the servers have been selected, that is, starting with the reception processing for the input of a password. This avoids the necessity of reselection of servers, and hence simplifies the operation of login to a plurality of servers. Further, when the “finish” button is operated, the login processing is terminated regardless of the processing state. Thus, the login processing may be terminated when login a desired server is confirmed. This permits easy and more reliable login the desired server. 
     In the login program  30  of the embodiment, for each server to which login has been successful, a green lamp has been turned on in the left side of the corresponding server in the login screen. However, any indication may be employed as long as the successful login can be notified. 
     In the login program  30  of the embodiment, as for the servers to which login has been unsuccessful among the selected servers, login processing has been executed in a state that the servers have been selected, that is, starting with the reception processing for the input of a password. However, also for the servers to which login has been unsuccessful among the selected servers, login processing may be executed starting with the reception processing for the selection of servers and the input of a password. Further, login processing need not start with the reception processing for the selection of servers and the input of a password as described above. That is, after login processing is performed for all the selected servers, the login processing may be terminated regardless of whether the login has been successful. 
     Although the present invention has been shown and described with reference to specific preferred embodiments, various changes and modifications will be apparent to those skilled in the art from the teachings herein. Such changes and modifications as are obvious are deemed to come within the spirit, scope and contemplation of the invention as defined in the appended claims.