Identity-based-encryption messaging system
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United States of America Patent
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Aug 4, 2009
Grant Date -
Sep 16, 2004
app pub date -
Mar 14, 2003
filing date -
Mar 14, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A system is provided that uses identity-based encryption to support secure communications between senders and recipients over a communications network. Private key generators are used to provide public parameter information. Senders encrypt messages for recipients using public keys based on recipient identities and using the public parameter information as inputs to an identity-based encryption algorithm. Recipients use private keys to decrypt the messages. There may be multiple private key generators in the system and a given recipient may have multiple private keys. Senders can include private key identifying information in the messages they send to recipients. The private key identifying information may be used by the recipients to determine which of their private keys to use in decrypting a message. Recipients may obtain the correct private key to use to decrypt a message from a local database of private keys or from an appropriate private key server.
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