| 摘要 |
Provided is a method and apparatus for establishing online a shared key that is required to perform a security communication between an automatic teller machine (ATM) and a host. Through this, it is possible to reduce costs and procedures that may be required to use or operate a certificate authority. Also, it is possible to reduce overheads that may occur in generating and verifying a certificate. Accordingly, it is possible to more securely prevent a leakage of the shared key.
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