SIGNATURE IDENTIFICATION AUTHENTICATION APPARATUS

Brand	Owner	Address	Description
MYSIGNCATCHER	Kumahira Safe Co., Inc.	2-4-34, Ujinahigashi Minamiku Hiroshima 734 Japan	signature identification and authentication apparatus for protecting access to electronic host systems, local area networks, wide area networks, computers, automated bank teller machines, building security systems, and electronic access gates;MY SIGN CATCHER;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A method for validating untrusted authentication chip, the method includes the steps of: generating a secret random number and calculating a signature for the random number using a signature function, in a trusted authentication chip; encrypting the random number and the signature using a symmetric encryption function using a first secret key, in the trusted authentication chip; passing the encrypted random number and signature from the trusted authentication chip to an untrusted authentication chip; decrypting the encrypted random number and signature with a symmetric decryption function using the first secret key, in the untrusted authentication chip; calculating a signature for the decrypted random number using the signature function in the untrusted authentication chip; comparing the signature calculated in the untrusted authentication chip with the signature decrypted; in the event that the two signatures match, encrypting the decrypted random number together with a data message read from the untrusted chip by the symmetric encryption function using a second secret key and returning it together with the data message to the trusted authentication chip; encrypting the random number together with the data message by the symmetric encryption function using the second secret key, in the trusted authentication chip; comparing the two versions of the random number encrypted together with the data message using the second key, in the trusted authentication chip; in the event that the two versions match, considering the untrusted authentication chip and the data message to be valid; otherwise, considering the untrusted authentication chip and the data message to be invalid.