Secure content objects

Details Secure content objects Secure content objects

2001-01-19

2009-02-24

Hoffman, Brandon S (Department: 2436)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

Reexamination Certificate

active

07496767

ABSTRACT:
A secure content object protects electronic documents from unauthorized use. The secure content object includes an encrypted electronic document, a multi-key encryption table having at least one multi-key component, an encrypted header and a user interface device. The encrypted document is encrypted using a document encryption key associated with a multi-key encryption method. The encrypted header includes an encryption marker formed by a random number followed by a derivable variation of the same random number. The user interface device enables a user to input a user authorization. The user authorization is combined with each of the multi-key components in the multi-key encryption key table and used to try to decrypt the encrypted header. If the encryption marker is successfully decrypted, the electronic document may be decrypted. Multiple electronic documents or a document and annotations may be protected by the secure content object.

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