Encryption key management system using multiple smart cards
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United States of America Patent
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Dec 14, 2004
Grant Date -
N/A
app pub date -
Nov 19, 1999
filing date -
Nov 19, 1999
priority date (Note) -
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Abstract
Initially, a key range variable is created by concatenating the card group value, card number and reference number for an encryption key to be generated. A hashing algorithm generates an encryption key from a master key and the variable key range variable. The encryption key and the key range variable are output to the caller who requested the key. The encryption key is used to encrypt the information, while the variable key range is stored with the encrypted data. Generation of a decryption key requires a user call for a decryption key and includes the key range variable from the encrypted data. A hashing algorithm generates a decryption key from the master key and the key range variable. The decryption key is used to decrypt the information.
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