| 摘要 |
PROBLEM TO BE SOLVED: To provide a mutual network authentication protocol whose security can be proved and which is safe and is based only on a password. SOLUTION: Shared secret gxy is generated between two parties A and B involved in sharing a password through a data network by using Diffie-Hellman type key exchange related to a specific group. The symbol g represents a group generating element that is already known to both parties involved, the symbol x represents an exponent that is known to one party A involved (e.g. client) and the symbol y represents an exponent that is known to the other party B involved (e.g. server). The party A generates a parameter m by performing a group operation with respect to gx and at least a password function H1 and transmits the parameter m to the party B. This, the party B performs an inverse group operation of the parameter m and the function H1 to extract the secrecy gx and can further calculates the shared secrecy gxy from the party B and can generate the shared secret gxy. |
