Cryptography – Key management – Key distribution
Reexamination Certificate
2007-02-20
2007-02-20
Moise, Emmanuel L. (Department: 2137)
Cryptography
Key management
Key distribution
C380S277000
Reexamination Certificate
active
10351683
ABSTRACT:
One aspect relates to a process and associated device that provides a private key of an asymmetric key pair in a key device. A symmetric master key is derived from the private key of the asymmetric key pair. The symmetric master key is stored in a computer memory location. The symmetric master key is used to encrypt or decrypt a file encryption key. The file encryption key can encrypt or decrypt files. In another aspect, the user can still access the files even if a user deactivates the key device by encrypting or decrypting the file encryption key directly from the symmetric master key.
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Benaloh Josh D.
Cross David B.
Gu Jianrong
Jones Thomas C.
Leach Paul J.
Merchant & Gould P,C,
Moise Emmanuel L.
Nguyen Minh Dieu
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