Information security – Prevention of unauthorized use of data including prevention... – Access control
Reexamination Certificate
2004-07-01
2009-02-17
Kincaid, Kristine (Department: 2139)
Information security
Prevention of unauthorized use of data including prevention...
Access control
C380S259000, C380S262000, C380S286000, C380S285000, C380S045000, C380S282000, C713S171000, C713S181000, C713S183000, C711S216000
Reexamination Certificate
active
07493661
ABSTRACT:
A method and apparatus for transferring a message securely from a sender to a recipient over a network and includes at each transfer: creating a message; retrieving the public key of the recipient from an external key server just prior to sending the message; signing the message using the private key of the sender; encrypting the signed message using a public key encryption algorithm and the public key of the recipient producing an encrypted signed message; generating an E-mail message addressed to the recipient; attaching the encrypted signed message as an attachment to the E-mail message; and, transmitting the E-mail message to the recipient.
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Cook David P.
Liu Gary G.
Fish & Richardson P.C.
Kincaid Kristine
Le Canh
Zix Corporation
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