Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for data encryption and decryption. In example embodiments, a first cipher key and a second cipher key are obtained. The first cipher key comprises a vector of cipher elements, and the second cipher key comprises a set of indices corresponding to a subset matrix of a polarizing matrix. A cipher vector is generated by polar coding of a data vector based on the first and second cipher keys and the polarizing matrix. The data and cipher vectors are combined for encryption of the data vector.

A cryptographic system includes an encryption apparatus including a memory and a processor configured to encrypt a plaintext into a ciphertext. The processor of the encryption apparatus executes generating first information resulting from encryption of the plaintext by an encryption function of a predetermined block cipher using a first secret key; generating second information resulting from encryption of a preset adjustment value by the encryption function using a second secret key; and generating the ciphertext by encrypting an arithmetic operation result of a bitwise exclusive OR of the first information and the second information by the encryption function using the first secret key.

A blockchain-based privacy protection method for a CCN includes: executing, by a trusted AAC, an initialization algorithm to generate common parameters and a master key, generating a public key and a private key for each consumer and publisher, and randomly generating, by the trusted AAC, its own public key and private key; calculating a public key, and generating ciphertext and uploading the ciphertext to a CSP; performing transaction on-chaining; and during decryption, finding, by the consumer, transaction information of the content on the consortium blockchain, sending an interest packet based on the transaction information, and obtaining ciphertext CT through a storage address in the transaction information; generating, by the consortium blockchain, an access transaction based on access information of the consumer; sending the ciphertext CT to the consumer through a data packet; and locally decrypting, by the consumer, the ciphertext CT, and verifying correctness of the content.

Disclosed are systems and methods that authenticate non-fungible tokens (“NFT”) and/or digital data represented by or pointed to by an NFT. In some implementations, authentication may be with respect to an existing NFT. In other implementations, authentication may be with respect to an NFT that is being created. The disclosed implementations may compare a candidate and/or candidate NFT data with existing NFTs and/or existing NFT data to determine if the candidate NFT and/or candidate NFT data is similar to other NFTs and/or other NFT data of another NFT, which may exist on any of many different blockchains.

A vehicle identifier and a nonfungible token (NFT) associated with the vehicle identifier are stored on an electronic ledger. The electronic ledger is a distributed electronic ledger shared between at least a computer and a remote computer. Upon transitioning a vehicle to an on state, the electronic ledger is queried to identify programming instructions associated with the NFT. Upon retrieving the identified programming instructions from the electronic ledger, the vehicle is actuated based on the retrieved programming instructions.

This disclosure relates to, among other things, systems and methods for deriving key identifiers and managing mapping between keys and key identifiers. Consistent with embodiments disclosed herein, the disclosed systems and methods may provide a mechanism that allows multiple parties to reconstruct unique identifiers given a set of known inputs that may be used to look up, identify, and/or otherwise access services and/or data objects. In some embodiments, this may allow for a service provider and a rights management service to independently derive key identification information based on information that both entities share (e.g., a content document such as a Content Protection Information Exchange Format document), thereby reducing requirements to maintain such mappings.

Systems and methods for sharing secrets including passwords, keys, and other confidential information used in computing environments. A secrets record generated at a secrets vault client device is encrypted using an application key associated with a computing environment. The encrypted secrets record is stored in the secrets vault server. The secrets vault client device configures a sharing client device and associated with an access token. The secrets vault client device hashes the access token and sends to the secrets vault server as a client identifier. The sharing client device performs a first-time authentication using a hashed access token with the secrets vault server. Upon successful authentication, the sharing client device requests secrets records from the secrets vault server using the client identifier.

A method for enabling pruning of a blockchain of a blockchain network includes creating an active blocks commitments Merkle tree from hashes of active blocks and creating an active smart contracts commitments Merkle tree from hashes of active smart contracts. The Merkle trees are created after an amount of blocks created in the blockchain has reached a threshold set by a pruning threshold parameter stored in the blockchain network. Hashes of the roots of the Merkle trees are stored in a header of a new block as a new genesis block. The new genesis block is broadcast to the blockchain network. A set of the active blocks and active smart contracts used respectively to create the active blocks commitments Merkle tree and the active smart contracts commitments Merkle tree are committed to upon the blockchain network reaching consensus on the new genesis block.

In one embodiment, data communication apparatus includes a network interface for connection to a network and configured to receive a sequence of data packets from a remote device over the network, the sequence including data blocks, ones of the data blocks having block boundaries that are not aligned with payload boundaries of the packets, and packet processing circuitry to cryptographically process the data blocks using a block cipher so as to write corresponding cryptographically processed data blocks to a memory, while holding segments of respective ones of the received data blocks in the memory, such that the packet processing circuitry stores a first segment of a data block of a first packet in the memory until a second packet is received, and then cryptographically processes the first and second segments together so as to write a corresponding cryptographically processed data block to the memory.

Systems, methods, and computer-readable storage media for receiving, from an issuer, an electronic prescription for a patient, then fulfilling that prescription using a blockchain/distributed ledger verification system. The system receives multiple public keys, combines them, then performs a hash function (or other encryption) on that combination. The resulting output is then transmitted to a pharmacy for prescription fulfillment.