Group oriented public key encryption and key management system
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United States of America Patent
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-
Mar 4, 2003
Grant Date -
N/A
app pub date -
Jun 18, 1998
filing date -
Jun 20, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a public key encryption system where an individual is used as a unit, an idea of 'group' is newly introduced. Then, both an encryption process operation of a plain text by an arbitrary member belonging to the group, and a decryption process operation of cryptogram information can be executed by employing such a combination key made from a group public key and a group secret key, which are produced in unit of 'group', and further an individual public key and an individual secret key. With employment of this encryption system, while high secrecies can be maintained inside and outside the group, the cryptogram information can be commonly shared based upon a confirmation of a member among members within the group. Also, an electronic signature can be made by a member belonging to the group.
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