14results about How to "Improve signature efficiency" patented technology

The invention discloses a more efficient lattice signature method based on lattice codes, and relates to the technical field of cryptography and information security, the method is improved on the basis of a Fiat-Shamir lattice signature scheme, a high-order hash technology and a one-dimensional character string are used for replacing a randomness technology of a multi-dimensional vector, and the more efficient lattice signature method is constructed. The rejection condition of the signature process can be optimized, so that the rejection frequency of the scheme is reduced, and meanwhile, the time required for single operation is reduced.

The invention relates to the technical field of cryptography, and discloses a time-limited key and message dependent open group signature method based on a lattice password. The method comprises the steps that a user interacts with a group administrator and joins in a group, and a private key of each group member is related to an authorization time period set; group members can generate group signatures in an authorized time period on behalf of the whole group; the group administrator can add the revocation element into the revocation list, and revokes the signature authority of the group member in the corresponding authorized time period; a verifier can verify the group signature through the revocation list; a group administrator can track all group signatures; the open authority may track a group signature for a corresponding message after obtaining an admitter-generated tag about the message. According to the method, a non-interactive and revocable message-dependent open group signature method is realized by combining a modified time-limited key method, and the anonymity and signature efficiency of a signer are enhanced.

The invention discloses a transaction signature method and device, a computer readable medium and electronic equipment, and the method comprises the steps: carrying out the elliptic curve point product calculation of a randomly generated signature confusion fragment with a preset length according to an elliptic curve public parameter, and summarizing, and obtaining a confusion voucher; generating a left signature of the transaction information according to the confusion voucher, the transaction information and the elliptic curve public parameters; based on each fragment parameter and the corresponding confusion factor, generating a fragment left parameter and a temporary factor corresponding to each fragment parameter; obtaining a randomly generated confusion parameter group; generating a right signature of the transaction information according to the temporary factor corresponding to each fragment parameter, the confusion parameter group and the left signature; and combining the left signature and the right signature to obtain signature data of the transaction information. According to the technical scheme, complex zero-knowledge proof parameter calculation does not need to be introduced, so that the data volume needing to be transmitted by the transaction participant is reduced, the calculation complexity of the transaction signature is also reduced, and the signature efficiency is improved.

The present invention discloses an electronic seal using method, device, equipment and computer-readable storage medium. The method comprises: if one or more electronic seal using requests sent by a user end are received, detecting whether the using request matches a preset rule set according to a preset matching condition; the using request comprises a document to be used for printing; if the using request matches the preset rule set, generating an operation thread corresponding to the using request based on the rule set; executing the operation thread to stamp the document to be used with an electronic seal; the present invention avoids the problem of low signing efficiency caused by manually stamping each document to be used with an electronic seal in turn, the present invention is easy to expand, can meet the large-scale and enterprise-level signing requirements, and improves the signing efficiency of the electronic seal.

The invention discloses a signature method and device of an application program, equipment and a storage medium, the signature method of the application program comprises the following steps: receiving an application certificate generation request of a development end, and when the application certificate generation request carries a csr file, signing and issuing an application certificate for the development end based on the csr file; the method comprises the following steps: acquiring application information of an application program to be signed, and signing and issuing a profi authorization file by adopting a profi key pair and a profi signature certificate which are generated in advance based on the application information; and controlling the development end to sign the application package data of the to-be-signed application program and the profi authorization file based on the key pair stored in the development end and the application certificate. The application certificate and the profi authorization file are automatically signed and issued for the application program according to the application certificate generation request sent by the development end, so that the development end can automatically perform digital signature based on the application certificate and the profi authorization file, and the signature efficiency of the application program can be effectively improved.

The embodiment of the invention provides a digital signature method and device, a storage medium and electronic equipment, and the method comprises the steps: carrying out the discretization of a to-be-signed target message, and obtaining N sub-messages, N being an integer greater than 1; processing each sub-message through the initialized parameter set to obtain a Hamming weight of each sub-message; and signing each sub-message by using the Hamming weight to obtain N signature results of the N sub-messages, and determining the N signature results as a target signature result of the target message. According to the invention, the method solves a problem that the signature of an elliptic curve cryptographic algorithm in the prior art consumes much time.

The invention belongs to the technical field of digital signature, and discloses a two-party SM2 signature method based on an obfuscation technology, which comprises the following steps of: 1, generating a key; step 2, confusing and returning the signature program; step 3, generating and sending an encrypted signature; 4, decrypting the encrypted signature, and outputting a standard signature; and 5, verifying the signature. Five algorithms including a key generation algorithm, a confusion SM2 encryption signature algorithm, a confusion algorithm, a decryption algorithm and a verification algorithm are used in the steps. According to the method, an SM2 signature technology and a Paillier encryption technology are combined, the security of a signature private key is effectively protected through program confusion, and provable white box security is achieved; the communication round is low, the efficiency is higher than that of an existing two-party signature method under the condition of high network delay, and high performance and usability are ensured.

The application relates to the technical field of electronic signatures, and provides a signature position determination method, device and equipment and a storage medium. The method comprises the following steps: obtaining a target file to be signed and a signature user who needs to perform signature on the target file; obtaining a target template file corresponding to the target file according to the file type of the target file and the signature user; identifying a historical signature position in the target template file, and calculating a signature position of the signature user in the target file according to the historical signature position. The signature position determination method provided by the application realizes automatic adaptation of the signature position based on the historical signature position of the template file, so that manual operation of dragging is not needed, the signature efficiency is improved, meanwhile, through automatic adaptation of the signature position, when multiple users need to perform signature on the same file and / or the same user needs to perform multiple times of signature, the wrong signature and the missed signature can be reduced.

The application provides a data cross-chain transmission method based on multi-signature proof, relates to the technical field of blockchain interoperability and cross-chain trusted transmission, and performs data update on a sending log list based on a cross-chain set of a message source chain, obtains broadcast log data and performs broadcast sending; a signer set is determined according to a heterogeneous chain type of the message source chain, a checkpoint of the broadcast log data is constructed based on the signer set; the checkpoint is subjected to hash calculation to obtain a checkpoint hash, the checkpoint hash is subjected to threshold signature according to the signer set to obtain a final certification; transmission data is obtained according to the checkpoint and the final certification, message verification is performed based on the transmission data on a target chain to obtain a verification result, the checkpoint containing the sending message can be subjected to threshold signature according to the blockchain, and the verification efficiency of cross-chain data verification is improved.

The invention discloses a digital signature method and device for big data, and relates to the technical field of big data management. According to the method, the data stream is signed in a segmented mode, each segment of data is signed independently, the current signature result is used as the input parameter of the next signature, the signature module can send the result data while operating, and the signature efficiency of a large amount of data can be improved.

The present invention relates to a dual-ring signature generation method based on the SM2 digital signature algorithm, which can effectively reduce the computational complexity and communication complexity, both of which can be reduced from the original single-ring structure to . The present invention also has the unconditional anonymity of the ring signature and can be proved under the random oracle model.

The invention relates to the technical field of electronic signature, and particularly provides an engineering drawing signature positioning method and device, a storage medium, electronic equipment and a product, and the method can comprise the steps: obtaining a page rotation value of a PDF document corresponding to an engineering drawing; obtaining a page equivalent matrix corresponding to the page rotation value; and determining a signature coordinate position based on the page equivalent matrix. According to some embodiments of the invention, the signature positioning accuracy can be guaranteed, and the efficiency of engineering drawing signature can be improved at the same time.

The application provides an anti-quantum cooperative signature method, and relates to the technical field of information security. The method comprises the following steps: acquiring an anti-quantum joint key, a joint random point, a first key random number and a second key random number; signing a message according to the joint random point and the first key random number to obtain a first signature component, and receiving a second signature component sent by a second communication terminal; signing the message according to the first signature component, the second signature component and first private key blocks corresponding to each first public key block in the first post-quantum public key to obtain a first joint signature; and generating a target joint signature according to the first joint signature and a second joint signature. The method provided by the application can significantly reduce the calculation and communication overhead, improve the signature efficiency and be suitable for a resource-limited scene.

The embodiment of the invention provides a data processing method and a data processing chip. The data processing method comprises the following steps: determining a signature node from at least two leaf nodes of a current Merkel tree; determining at least one verification node from a plurality of nodes of the current Merkel tree based on the signature node; and in the process of determining the father node of the first node, if the first node is one verification node in the at least one verification node, outputting the first node, and determining the father node of the first node based on the first node. Therefore, in the process of upwards determining the father node of a certain node, if the node is the verification node, the node is output firstly, and then the father node of the node is determined, so that the output sequence of each verification node is ensured to be an upward sequence, and no additional storage space is needed for independently storing each verification node; therefore, not only is the storage space reduced, but also the resource consumption is reduced and the signature efficiency is improved while the signature security is ensured.