7 results about "Target signature" patented technology

The application relates to a method and device for identifying a proxy signature, electronic equipment and a storage medium, and relates to the technical field of information security and pattern recognition. The method comprises the following steps: acquiring a set of signature images without labels; for each original signature image, performing standardization preprocessing on the original signature image; inputting each obtained target signature image into a feature extraction model trained through migration learning to extract a deep feature vector; freezing the parameters of a pre-trained bottom model and fine-tuning the parameters of a top model during training; using a density-based unsupervised clustering algorithm to cluster the target signature images according to the deep feature vectors; performing character recognition on each target signature image in each cluster to obtain signature texts; and if each signature text corresponding to a cluster contains at least two different names, it is determined that a proxy signature exists. The application realizes efficient, automatic and high-credibility identification of the specific illegal mode of one person proxying for multiple people without relying on supervised learning.

A method of generating a blockchain transaction comprising: generating a transaction comprising a locking script comprising a first shared hash value (HV) generated by applying a hash function (HF) to a second shared HV, wherein the second shared HV is generated by applying a HF to a combination of the respective public keys, and wherein the locking script is configured to require an unlocking script to comprise a target public key, a target signature, and an intermediate HV generated based on all but one of the respective public keys, apply the HF to the target public key to generate a target HV, combine the target HV and the intermediate HV to generate a target second shared HV, apply the HF to the target second shared HV to generate a target first shared HV, an verify that the target first HV matches the first shared HV, and verify the target signature.

This application discloses a method, apparatus, device, and computer storage medium for electronic signature verification, relating to the field of blockchain technology. The method involves a user device sending an electronic signature retrieval request to a server. Upon receiving the request, the server retrieves verification images of text corresponding to the user's identifier from different storage areas of the blockchain device and sends them to the user device. Multiple verification images of different texts are stored in different storage areas. After receiving the verification images, the user device selects a signature image from the verification images and sends the selection result to the server. The server receives the selection result and, if the selection result includes a signature image of the text corresponding to the user's identifier, verifies the signature image, combines them to generate an electronic signature, and sends the electronic signature to the user device. This embodiment stores different signature images in different areas, and after verification, the user generates a target signature image based on the signature image identifier, thus improving the security of electronic signature verification.

Embodiments of the present application provide a signature generation method, a signature verification method and a computer device. The method comprises: in response to receiving a target information product, obtaining a target information segment from the target information product; converting the target information segment into a target information segment represented in a target encoding format by using a preset encoding conversion rule; generating target signature information of the target information product based on the target information segment represented in the target encoding format, and then verifying a to-be-verified information product by using the target signature information. The signature information of the technical solution has good tamper resistance and abuse prevention capability, and meets the demand of AI service for response speed.

The application discloses an electronic signature comparison method and device, computer equipment and a storage medium. The electronic signature comparison method comprises the following steps: obtaining a signature comparison request, the signature comparison request comprising a target name and a user input signature corresponding to the target name; processing the target name by using a pre-trained target signature generation model to obtain a target signature corresponding to the target name; performing feature extraction on the user input signature and the target signature respectively to obtain a first feature vector corresponding to the user input signature and a second feature vector corresponding to the target signature; and obtaining an electronic signature comparison result based on the first feature vector and the second feature vector. The technical scheme can reduce errors in the electronic signature comparison process and improve the accuracy of the electronic signature comparison.

The present application relates to a fault injection method and apparatus, a fault testing method and apparatus, a computer device, and a medium. The fault injection method comprises: acquiring a fault modification request, parameters of the fault modification request at least comprising a target signature, a target identifier, a fault type, modification content, and an injection validity period; calling a fault injector to generate a fault program corresponding to the fault modification request; and using the fault injector to inject the fault program into a target function, wherein when the target function is called by a target process, the fault program is used for processing an input parameter and / or a return parameter of the target function, the target function is a function corresponding to the target signature, and the target process is a service process corresponding to the target identifier.

Embodiments of the present application provide a kind of asynchronous collaborative signature processing method, device, electronic equipment and storage medium, the method includes: sending the pre-application request of collaborative signature to cooperation party equipment, wherein, first to be signed data is included in pre-application request;Pre-application information corresponding to pre-application request returned by cooperation party equipment is received, current signature time and pre-application information are signed by using the signature algorithm of pre-setting, and target signature data is obtained;Target signature data is sent to receiver equipment, and receiver equipment judges whether current signature time is in line with signature time window after receiving the target signature data, and then target signature data is verified.Through collaborative signature pre-application mechanism and signature time window control mechanism, the efficiency and availability problem caused by traditional collaborative signature network dependence and the security risk problem caused by time effectiveness loss are effectively solved.