Access and storage of secure group communication cryptographic keys
Patent 6256733 Issued on July 3, 2001. Estimated Expiration Date: 
June 30, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 30, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesProcess for improving public key authentication Broadcast key distribution apparatus and method using Chinese Remainder Verification of the source of program information in a conditional access system Patent #: 6105134 InventorsAssigneeApplicationNo. 343761 filed on 06/30/1999US Classes:713/156, By certificate380/277, KEY MANAGEMENT380/279, Key distribution center380/286, Key escrow or recovery713/155, Central trusted authority provides computer authentication713/158, Revocation or expiration713/175By generation of certificateExaminersPrimary: Swann, Tod R.Assistant: Darrow, Justin T. Attorney, Agent or FirmInternational ClassesH04L 009/32H04L 009/08 AbstractA method and apparatus for secure group communication allows on-demand procurement of stored security credentials of a group. In one embodiment, this is done by having a processor store at least a portion of the security credentials of the group in a location accessible from more than one member of the group, such as in an encrypted form in a public directory. Security credentials include at least a cryptographic key use to secure information. Each member may have a dedicated entry containing a group security credential associated with that member. The information may also be stored in a variety of other ways including, for example, storing a composite set of encrypted group security credentials. A member accesses the stored group security credentials on an on-demand basis.Other References
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