Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1996-06-07
1998-05-05
Barron, Jr., Gilberto
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 30, H04L 908
Patent
active
057487359
ABSTRACT:
A method is provided for securing stored files in a system having a plurality of system users with each system user having an associated asymmetric crypto-key with a public key portion and a corresponding private key portion. Each public key portion is accessible to the plurality of system users. Each private key portion has a first private key portion known only to the associated user and a corresponding second private key portion known only to a security server. Data to be stored is identified. A symmetric crypto-key is encrypted with only the second private key portion of a first user crypto-key to form an encrypted key message, thereby restricting access to the symmetric crypto-key to only the first user. The symmetric crypto-key is obtained by the first user by applying the first private key portion of the first user crypto-key to decrypt the encrypted key message. The first user encrypts the data with the symmetric crypto-key to form an encrypted file, and stores the encrypted file and the encrypted key message.
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Barron Jr. Gilberto
Bell Atlantic Network Services Inc.
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