Encryption and decryption method and apparatus

Details Encryption and decryption method and apparatus Encryption and decryption method and apparatus

1997-01-31

1999-12-28

Barron, Jr., Gilberto

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 30, 380 49, H04L 932

Patent

active

060091738

ABSTRACT:
A method for efficient encryption and decryption (100) comprises the steps of encrypting a message (104) at a sending unit which is to be sent to a receiving unit using a message key (106) and appending to the message at the sending unit the message key encrypted (108 and 109) using a receiver's public key (110). Subsequently, a sender's certificate (116) is appended at a first server (302) and extracted at a second server (310). The message key is then decrypted at the receiving unit using a receiver's private key (140) to provide a decrypted message key. Subsequently the message is decrypted using the decrypted message key (142 & 143) and authenticated by comparing a pair of digest (152 and 156).

REFERENCES:
patent: 5283832 (1994-02-01), Lockhart, Jr. et al.
patent: 5420927 (1995-05-01), Micali
patent: 5475758 (1995-12-01), Kikuchi
patent: 5532920 (1996-07-01), Hartrick et al.
patent: 5588060 (1996-12-01), Aziz
patent: 5604804 (1997-02-01), Micali
patent: 5606617 (1997-02-01), Brands
patent: 5751813 (1998-05-01), Dorenbos
patent: 5812671 (1998-09-01), Ross, Jr.

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