| 摘要 |
The present invention relates to an on-line/off-line electronic signature system for securing the safety of an off-line token, by using the off-line token protected by encryption, and a method thereof. More particularly, the present invention relates to an on-line/off-line electronic signature technique to secure the safety of an electronic signature technique since confidential information is not exposed even when the off-line token is exposed, by encrypting the off-line token by using a symmetric-key algorithm. The on-line/off-line electronic signature system includes a key generation part, an on-line/off-line signature generation part, and a signature verifying part. |
