Patent ID: 7895163

Claim:
A method for managing messages in an archiving system for Electronic Discovery (E-Discovery), the method comprising: capturing a message through classifying the message by at least one of a port number, a packet content and a packet pattern when the message is transmitted by all communication devices officially recognized in a company; storing the captured message at an on-line storage through an indexing and a compression after removing a duplicate the message for a large capacity retrieval, wherein the message is stored in a form of an original message or together with a hash value about data proving the message to be the original message in order to increase a legal evidence power, wherein the duplicate message is removed by identifying the duplicate the message through an analysis of an Identifier (ID) included in a header of the message or a periodic management/comparison of the hash value of the message data, wherein, unless the message is stored in the form of the original message, data on the message is separated and stored by each attribute of names (accounts) of a sender and a receiver (or accounts), a title, a main text, and an attached file in order to retrieve and manage one of the captured messages; and backing up the data at a unalterable permanent recording media in accordance with priorities selectively designated according to the attributes, where at least one of the names (or accounts) of the sender and receiver and the title of the message is retrieved on the on-line storage in a longer term than at least one of the main text and the attached file by preferentially backing up at least one of the main text and the attached file and by subsequently backing up at least one of the names (or accounts) of the sender and receiver and the title of the message.