Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-04-20
2009-08-25
Nalven, Andrew L (Department: 2434)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
Reexamination Certificate
active
07581106
ABSTRACT:
One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if terms of a license agreement associated with the digital certificate are violated.
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Agrawal Sunil C.
Das Sujata
Myers, IV Charles R.
Adobe Systems Incorporated
Kowert Robert C.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Nalven Andrew L
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