| 摘要 |
<p>The present invention relates to a method for digitally signing transaction data using a digital signature scheme based on cryptographic primitives, preferably asymmetric cryptography. The digitally signing comprises the steps: a) sending data (50, 51, 52) on the basis of the transaction data (50) from an e-commerce server (100) to a service provider (11); b) digitally signing the received data (50, 51, 52) on the service provider (11) by using a private signature generation key (20) of said service provider (11); c) generating visually observable digitally signed data (30) on the basis of the digitally signed data (150, 151, 152) and d) providing the visually observable digitally signed data (30) to a user. The present invention also relates to the subsequent verifying method for verifying whether the visually observable signed data (30) are signed by the service provider (11). The verifying method comprising the steps of: e) capturing the visually observable digitally signed data (30) with a camera of a mobile device (3) and temporarily storing the captured data in form of image data in a memory of the mobile device (3); f) transforming said image data into digitally signed data; g) verifying whether the digitally signed data are signed from the service provider (11) by using the public signature verification key (10) of service provider (11); and h) displaying the result of the verifying step g) on a display (4) of the mobile device (3).</p> |
