Methods and systems for verifying a location factor associated with a token
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United States of America Patent
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Dec 6, 2011
Grant Date -
Mar 20, 2008
app pub date -
Aug 31, 2006
filing date -
Aug 31, 2006
priority date (Note) -
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Abstract
A server, method and/or computer-readable medium verifies a location factor associated with a token. The server generates a challenge and encrypts the challenge by a key commonly shared by the server and the token, and transmits the encrypted challenge to the token. The token decrypts the encrypted challenge by the commonly shared key and manipulates the challenge by an elliptic curve cryptography (ECC) procedure so that the server can verify that the signed manipulated challenge was generated at the token based upon the ECC public key.
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