Yaksha, an improved system and method for securing communications using split private key asymmetric cryptography
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United States of America Patent
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-
Jul 9, 1996
Grant Date -
N/A
app pub date -
Nov 9, 1994
filing date -
Nov 9, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a system, such as a system utilizing a Kerberos protocol, system users each have an associated asymmetric crypto-key. The security of communications over the system is enhanced by a first user generating a temporary asymmetric crypto-key having a first temporary key portion and an associated second temporary key portion. The second temporary key portion is encrypted by the first user with the first private key portion of the first user crypto-key to form a first encrypted message. Another user, preferably an authentication server, applies the second private key portion and the public key portion of the first user crypto-key to the first encrypted message to decrypt the second temporary key portion and thereby authenticate the first user to the security server. The authentication server then encrypts the first encrypted message with the second private key portion of the first user crypto-key to form a second encrypted message. The first user next applies the public key portion of the first user crypto-key to decrypt the second encrypted message and obtain the second temporary key portion, thereby authenticating the security server to the first user.
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