Method for providing blind access to an encryption key
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United States of America Patent
Stats
-
Oct 8, 1996
Grant Date -
N/A
app pub date -
Mar 9, 1995
filing date -
Mar 9, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Blind access (100, 300, 400) to a desired encryption key of a predetermined first group member is provided to a second group. The first group encrypts a plurality of first group member encryption keys using a predetermined algorithm and transfers to the second group, the encrypted plurality of first group member encryption keys with corresponding unencrypted first group member identification fields, IDs, and a list of IDs corresponding to the first group members. The desired ID-free encryption key is selected and encrypted by the second group using a predetermined algorithm. The doubly encrypted key is transferred to the first group, decrypted by the first group and transferred to the second group for decryption. Thus, the encryption key is provided without knowledge to the first group of which member's encryption key is being examined and with knowledge to the second group of only the desired encryption key.
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