11results about How to "Improve decryption efficiency" patented technology

The invention discloses an audio stream adaptive decryption method, system and device and a storage medium. The method comprises the following steps: acquiring an MPEG-DASH list file and analyzing the MPEG-DASH list file; the standard DRM interface is initialized; performing feature extraction on the identified audio segmentation information in the audio segmentation mode, and dynamically adjusting a segmentation request and processing logic according to the extracted features to perform adaptive segmentation downloading and preprocessing; extracting the encryption parameter to identify an encryption mark of the target audio stream platform, and selecting a corresponding decryption algorithm according to the encryption mark to decrypt the current audio segment; and performing audio frame reconstruction on the decrypted data to form an updated audio stream, caching the updated audio stream to a preset cache region based on a self-adaptive buffer strategy, and outputting the final audio stream to ensure the continuity of the final audio stream and realize efficient parallel processing of decryption and playing, so that the decryption efficiency is improved, and the user experience is improved. And particularly, in a high-concurrency scene, the user experience is improved.

The embodiment of the invention provides an equipment resource decryption method and device, electronic equipment and a storage medium, and relates to the technical field of resource decryption. In the embodiment of the invention, an application program can store a password used for decrypting a first device resource in a cache under the condition that the first device resource is successfully decrypted, and sends first linkage information to a loaded first to-be-decrypted device resource, and the first linkage information is used for prompting to execute linkage decryption on the first to-be-decrypted device resource. And performing linkage decryption on the first to-be-decrypted device resource by using the password in the cache. Therefore, under the condition that the password for successfully decrypting the first equipment resource is obtained, the password can be directly utilized to perform linkage decryption on the first to-be-decrypted equipment resource, and the decrypted equipment resource is obtained. Therefore, a user can directly browse other device resources without decrypting each device resource, so that the complexity of device resource decryption is reduced, and the efficiency of device resource decryption is improved.

The invention relates to the technical field of intelligent network connection, in particular to a management system and method adaptive to multiple sets of public key infrastructure (PKI) security certificates, and aims to solve the problem of how to reduce the complexity of switching different PKI certificate systems at a vehicle end. The invention provides a management system adaptive to multiple sets of public key infrastructure (PKI) security certificates, which is applied to an Internet of Vehicles terminal, and comprises a security management module used for processing security messages and providing security credentials and security data; the PKI system detection module is in signal connection with the safety management module and is used for acquiring the system type of a PKI system currently applied by the vehicle networking terminal; and the adaptation module is in signal connection with the PKI system detection module and is used for receiving the system type from the PKI system detection module and calling a corresponding vehicle end software development kit SDK according to the system type so as to implement a PKI function corresponding to the system type.

The invention provides a data processing method and device, electronic equipment and a storage medium, and relates to the field of network security. When an SSL connection with an opposite terminal is established based on a national cryptographic algorithm and an encrypted data packet sent by the opposite terminal based on the SSL connection is received, the encrypted data packet is sent to the opposite terminal; the method comprises the following steps of: merging encrypted data blocks with the size of a first data block in an encrypted data packet into a merged encrypted data block with the size of a second data block, and merging the encrypted data blocks which are not enough to be merged into the merged encrypted data block into the merged encrypted data block by using an auxiliary patch; the size of the first data block is the size of the data block processed by the native national cryptographic algorithm, the size of the second data block is the size of the data block processed by the national cryptographic algorithm accelerated based on the instruction set, and the size of the second data block is larger than the size of the first data block and is a multiple of the size of the first data block. In this way, the combined encrypted data block can be decrypted by using the national cryptographic algorithm accelerated based on the instruction set, so that the data decryption efficiency in an SSL encryption communication scene can be improved.

The application relates to a collaborative decryption attribute encryption method and system suitable for a file sharing scene and relates to the technical field of information security, and solves the technical problem of how to design an attribute encryption scheme suitable for a one-to-many file publishing and sharing scene. The method comprises the following steps: an attribute authorization agency generates system parameters and generates a user private key according to the system parameters and multiple attributes of a user; a data owner performs monotone span program encoding on an access strategy and generates attribute ciphertext encapsulating a symmetric key according to an encoding result and the master public key; a data user performs monotone span program decoding on the encoding result of the data owner and generates collaborative request data according to a decoding result and the attribute ciphertext; an attribute collaborative manager generates collaborative decryption data according to the collaborative request data; and the data user recovers the symmetric key according to the collaborative decryption data.

The invention discloses a block chain-based lightweight message distribution mechanism for Internet of Things end equipment, CP-ABE decryption operation is unloaded to edge equipment for processing, and after the edge equipment completes ciphertext dimension reduction conversion, terminal equipment only needs to execute bilinear pairing operation and group element multiplication operation once to complete decryption. A task scheduling mechanism based on attribute cooperative authorization is designed, and distribution of ciphertext conversion tasks between edge devices is supported. According to the method, the ciphertext is encrypted by adopting CP-ABE, the identity information of the message receiver on the block chain is encrypted and hidden, and the temporary identity credential is decrypted on the edge equipment, so that correct distribution of the message is ensured, and the risk of inferring the long-term behavior privacy of the user through on-chain transaction mode analysis is prevented. A credible collaboration system is constructed based on an intelligent contract, and the traceability of a collaboration process, the compliance of node screening and the blocking of illegal equipment are guaranteed. The mechanism effectively avoids the limitation of the traditional scheme in the aspects of terminal computing load, edge expansibility, identity privacy protection and the like.

This invention relates to a fast decryption method for attribute-based encryption using a key policy based on SM9. The method includes: a key generation center first generates system public parameters and a system master private key based on given system security parameters; secondly, it defines the system's attribute space based on the attributes used in the system; finally, it publishes the system public parameters but keeps the master private key secret; the data owner encrypts the message based on the attribute set corresponding to the data, generating corresponding ciphertext; the key generation center sets an access policy based on the user's decryption permissions, where a matrix is ​​used to map rows in the matrix to attributes in the attribute set, generating a private key corresponding to the corresponding access policy; after receiving the ciphertext, the data receiver can successfully decrypt it if and only if the attribute set in the ciphertext satisfies the access policy on the key; otherwise, decryption fails. This invention overcomes the decryption efficiency problem in attribute-based encryption algorithms using a key policy based on SM9.

The present disclosure provides a data encoding method, device, electronic device and storage medium applied to a homomorphic encryption system, wherein the method comprises: obtaining multiple groups of original data to be subjected to homomorphic operation, and determining, for each group of the original data, the encoding range and scaling ratio corresponding to the original data; encoding the original data based on the encoding range and scaling ratio corresponding to the original data to obtain encoded data corresponding to the original data; the value of the encoded data is less than or equal to the maximum value of the encoding range; for the encoded data corresponding to each group of the original data, merging the encoded data corresponding to the group of original data to obtain target data corresponding to the group of original data; the target data supports homomorphic operation properties; homomorphically encrypting the target data corresponding to each of the multiple groups of original data to obtain ciphertext data, and the ciphertext data is used to perform homomorphic operation.

The present application provides a bidding document processing system based on blockchain, including a bidding document production system client, a digital witness service platform, a bid opening auxiliary system and a blockchain support system. The bidder can select the decryption method corresponding to the bidding document through the bidding document production system client. When the bidder chooses automatic decryption, the bidding document production system client can upload the decryption key corresponding to the bidding document to the node device of the blockchain support system for storage after segmented encryption. When the bidding is reached, the tenderer can automatically decrypt the bidding document that has been authorized for automatic decryption through the bidding opening auxiliary system, the digital witness service platform and the blockchain support system. Therefore, compared with the unified uploading of the bidding documents and the decryption key to the electronic bidding platform for maintenance and decryption, it can not only ensure that the bidding documents are not tampered with or leaked before the bidding is opened, but also avoid centralized processing and improve the decryption efficiency of the bidding documents.

Embodiments of the present disclosure provide a decryption method, a variable storage method, and related devices, equipment, media and products. The decryption method monitors the current signal of the chip through the current probe, monitors the electromagnetic signal of the SRAM through the electromagnetic probe, determines the key bit value corresponding to the coordinate value stored in the SRAM based on the signal change mode of the current signal and the electromagnetic signal, and then obtains the decryption result. Through the current-electromagnetic dual-channel acquisition and analysis scheme, the ability to obtain effective information in the decryption process is improved, the redundant information processing process is reduced, and the password cracking efficiency is improved. The variable storage method stores the coordinate values of at least two coordinate dimensions of at least one password intermediate variable in at least two SRAMs, or stores the coordinate values of at least one coordinate dimension of at least two password intermediate variables in the same SRAM, which can avoid local electromagnetic radiation analysis and the storage process does not affect the execution efficiency of the encryption algorithm.

The invention relates to the technical field of decryption, in particular to a lattice-based decryption method and device, equipment, a medium and a chip, and the method comprises the steps: obtaining a private key s, and splitting the private key s into a first sub-private key s1 and a second sub-private key s2; acquiring a ciphertext (u, v), acquiring a first decryption parameter w1 based on w1 = v-s1Tumodq, and acquiring a second decryption parameter w2 based on w2 =-s2Tumodq; obtaining a third decryption parameter m1 based on # imgabs0 #, and obtaining a fourth decryption parameter m2 based on # imgabs1 #; and acquiring a plaintext m based on the # imgabs2. The scheme is a decryption protection scheme with a mask, can resist first-order side channel attacks, is relatively simple, does not need multiple times of analog conversion or addition and subtraction operation, improves the decryption efficiency and reduces the cost.