Encrypted content recovery

Details Encrypted content recovery Encrypted content recovery

2007-05-08

2007-05-08

Song, Hosuk (Department: 2135)

Cryptography

Key management

C380S281000, C380S282000

Reexamination Certificate

active

10404689

ABSTRACT:
Systems and techniques to enable secure and efficient recovery of encrypted content may include accessing a public key of a user and another user and encrypting data using the public keys. The another user may be the user's manager. Systems and techniques may include generating a session key, encrypting data using the session key, and encrypting the session key using the public keys of at least two users. A data structure such as a directory may be accessed to obtain information such as one or more public keys.

REFERENCES:
patent: 5144665 (1992-09-01), Takaragi et al.
patent: 5200999 (1993-04-01), Matyas et al.
patent: 5559889 (1996-09-01), Easter et al.

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