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Collaborative signature method and device supporting trusted display

A technique for trusted, signed messages, applied in the field of cryptography

Active Publication Date: 2019-11-26
北京向芯力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the access control is done at the caller, and the attacker can bypass this restriction by tampering with the caller's program to complete a complete digital signature

Method used

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  • Collaborative signature method and device supporting trusted display
  • Collaborative signature method and device supporting trusted display
  • Collaborative signature method and device supporting trusted display

Examples

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0053] Such as figure 1 As shown, a collaborative signature method supporting trusted display includes the following steps:

[0054] Step 11: The sub-private key D is stored in the caller 1 , securely store sub-private key D in the cooperative party 2 ;

[0055] Step 12: The caller uses the sub-private key D 1 Generate the first part of the signature Q 1 , and the messages M and Q to be signed 1 sent to the collaborating party;

[0056] Step 13: The cooperating party credibly presents the message M to be signed, and after the user verifies that the message is correct, generates the message digest e of the message M t...

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PUM

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Abstract

The invention discloses a collaborative signature method and device supporting trusted display, and the method comprises the following steps: 1), signature parameters are initialized and public parameters needed in the whole signature process are generated; 2) a calling party and a collaboration party generate a secret key; according to the scheme, it is guaranteed that a complete digital signature can be generated only after a user confirms that the to-be-signed message is correct, and meanwhile it is guaranteed that when data of the collaboration party is lost, an attacker cannot generate the complete digital signature through the collaboration party due to the fact that the data of the collaboration party lacks a sub-private key stored in the calling party.

Description

technical field [0001] The invention relates to cryptography technology, in particular to a collaborative signature method and device supporting credible display. Background technique [0002] Digital signature devices are widely used in e-commerce, e-government and other scenarios to provide functions such as digital signature and identity authentication. [0003] At present, the private key information is stored in the digital signature device. In order to prevent the digital signature device from digitally signing the wrong message without the user's knowledge, the existing technology proposes: the caller initiates the message according to the information to be signed sent by the digital signature requester. When requesting a digital signature, the information to be signed is displayed to the user. After the user confirms the correctness of the information to be signed and verifies the user's PIN code, the digital signature is completed and returned to the digital signatu...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L9/30H04L9/32
CPCH04L9/0825H04L9/0861H04L9/0866H04L9/0869H04L9/3066H04L9/3247
Inventor 韩留明王庆芝
Owner 北京向芯力科技有限公司
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