Importance

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Abstract

The amount of information associated with an electronic mail message that must be transmitted from an electronic mail server to a client electronic mail application at a user's computer or workstation is reduced using a cache-based compaction technique. This technique enable a requested electronic mail message to be encoded in the server using information relating to similar objects that were previously transferred by the server to the client and that remain available to the server. Differential encoding is performed in the server such that the server transmits to the client information indicative of the differences between the requested object and the reference (similar) objects available in the server cache. A corresponding decoding operation is performed in the client, using the encoded version and reference objects available in the client cache. A similar technique is employed for encoding electronic mail messages in the client that are to be transmitted to the server.

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First Claim