Method of changing key fragments in a multi-step digital signature system
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United States of America Patent
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Jun 25, 2002
Issued Date -
N/A
app pub date -
Dec 23, 1998
filing date -
Jun 5, 1995
priority date (Note) -
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Abstract
A multi-step digital signature system and method is provided having a distributed root certifying authority 20. Messages received at the root certifying authority 20 are distributed to root certifying authority members 22-30 who attach partial signatures to the message using root key fragments. In the system and method provided, the system adapts to system events such as the addition or removal of key fragment holders, the need to modify key fragments, etc., by changing key fragments.
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