Communication apparatus

Details Communication apparatus Communication apparatus

1996-05-31

1998-08-18

Nguyen, Hoa T.

Cryptography

Key management

Having particular key generator

380 3, G11B 2328

Patent

active

057969434

ABSTRACT:
A non-contact type IC card comprising a memory including a manufacturer code area and an error signal output circuit is disclosed. The error signal output circuit outputs an error signal such that an access from a read/write apparatus is allowed when a password coincidence is obtained when a predetermined code is stored in the manufacture code area. On the other hand, when the predetermined code is not stored in the manufacturer code area, the error signal output circuit outputs an error signal such that an access to all the memory area from the read/write apparatus is allowed regardless of a result of the password collation performed by the password collation circuit.

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