IC card and authentication method for information processing apparatus
First Claim
1. An IC card for connection to an information processing apparatus, comprising:
- a clock for counting time;
ID storage means for storing a permanent ID;
information storage means for storing a changeable password to identify said IC card when said IC card is connected to said information processing apparatus;
procedure storage means for storing a changeable ciphering program for encrypting said password; and
control means for encrypting said password in accordance with said ciphering program stored in said procedure storage means and outputting the encrypted password to a connected information processing apparatus in response to a request for such encrypted password from the connected information processing apparatus.
2 Assignments
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Accused Products
Abstract
An IC card 30, which is employed to permit the exchange of secret information while ensuring that security is maintained, includes: a ROM 38 in which an ID is held; a clock 42; a RAM 40 in which a password is stored; a RAM 36 in which a ciphering program is stored; and a CPU 34 that executes a process. The ciphering program is loaded, the stored ID, password and the time t measured by the clock 42 are read and encoded in accordance with the ciphering program, and the results are outputted to a computer system 10. The computer system 10 decodes the output from the IC card 30 and extracts a password, and compares the decoded password with a registered password. When the passwords match, access is enabled; but when they do not match, access is disabled.
117 Citations
6 Claims
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1. An IC card for connection to an information processing apparatus, comprising:
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a clock for counting time; ID storage means for storing a permanent ID; information storage means for storing a changeable password to identify said IC card when said IC card is connected to said information processing apparatus; procedure storage means for storing a changeable ciphering program for encrypting said password; and control means for encrypting said password in accordance with said ciphering program stored in said procedure storage means and outputting the encrypted password to a connected information processing apparatus in response to a request for such encrypted password from the connected information processing apparatus. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification