METHOD AND APPARATUS FOR AUTHENTICATING A RECIPIENT OF A SECURITY TOKEN

摘要

Disclosed are a method and apparatus for authenticating a recipient of a security token. An external apparatus connected to the security token performs a concatenation operation on a pseudorandom number received from the security token and on a constant value. After a unidirectional hash function is applied, a value resulting from the unidirectional hash function and a symmetrical key encryption algorithm for a shared authentication key are applied and transmitted to the security token, and the security token authenticates the recipient on the basis of whether or not a self-generated encryption value and a received encryption value are the same.