Described herein is a system and method for validating media integrity using asymmetric key cryptography utilizing a public/private cryptographic key pair. The private key is kept secret and is known to an originator and/or publisher of a media file. The public key is added to the media file and is used to validate integrity of the media file, that is, that content of the media file (e.g., portion(s), frame(s)) has not been altered since publication of the media file. By validating integrity of the media file, strong proof that the media file came from an owner of the keypair (e.g., had possession of the private key) can be obtained, for example, resolving issues of trust and/or authenticity common in altered content. In some embodiments, information regarding an origin of the content can further be determined.

Generating a verifiable pairwise claim. Receiving a request for issuing a verifiable claim that is associated with a subject entity and is verifiable by one or more verifying entities. The request includes at least an encrypted portion using a particular type of encryptography. Verifying that the subject entity is associated with a subject of the verifiable claim based on decrypting the encrypted portion using the particular type of cryptography. In response to verifying that the subject entity is associated with the subject of the verifiable claim, issuing the verifiable claim that is structured to be verifiable only by the one or more verifying entities.

A method for data processing is performed by an operation data recording device. The method includes: in response to a data access request sent by a client for a target vehicle, generating symmetric keys for symmetrically encrypting operation data of the target vehicle, in which the symmetric keys are generated based on a user ID and a primary public key for a third party, and the user ID is carried in the data access request; obtaining target encrypted data by symmetrically encrypting the operation data using the symmetric keys; and sending the target encrypted data to the client.

A method including determining, by a device, a sharing decryption key based at least in part on an assigned private key associated with the device and a group access public key associated with a group; decrypting, by the device, a group access private key associated with the group by utilizing the sharing decryption key; and decrypting, by the device, encrypted content included in a folder associated with the group based at least in part on utilizing the group access private key associated with the group. Various other aspects are contemplated.

A system software and method which relates to the field of computing technology or business process models or computer systems or distributed computer systems or computer networks relating to general purpose devices that can be programmed to carry out a set of data table or hash table updates, validations or modifications supporting, enabling or executing public and private services, financial transactions and commercial applications. More specifically, the present invention is directed to distributed and decentralized computing in which said distributed network is supported and encrypted by cryptographic technology, hash functions and distributed public or private keys or other related technology. System and methods for managing dynamic electronic documents on a private distributed ledger comprise establishing a dynamic electronic document comprising a first state object, wherein the state object references a prior approved first transaction; proposing a second transaction comprising as an input the first state object and as an output a transaction command to alter the state object as well as what parameters are required to validate the second transaction; validating the proposed second transaction; and updating the state object on a private distributed ledger to reference the second transaction.

The present invention realizes an electronic signature system with high security level in which abuse of a signature key by a system administrator is prevented. A user sets an authentication information conceived by the user himself to his/her own signature key stored in the tamper resistant device (5) via the terminal device (2). When digitally signing an electronic document, the user transmits his/her own encrypted authentication information to the tamper resistant device (5) through the terminal device (2) and asks for permission to use his/her signature key. The tamper resistant device (5) decodes the inputted authentication information, verifies the decoded authentication information, and allows the digital signing only if the correct authentication information is entered. As a result, the electronic signature system in which only a user having valid use authority for the signature key can digitally sign is built.

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.

An electric vehicle charger includes a power supply and a controller. The power supply is for supplying electric power over a charging connection to an electric vehicle. The charging connection employs charging conductors to supply electric power from the power supply to the electric vehicle for charging. The power supply is adapted to send data to and receive data from the electric vehicle over the charging conductors according to a power-line communications protocol. The controller coupled to the power supply to control supply of electric power to the electric vehicle, The controller is adapted to, prior to initiating supply of electric power by the power supply to the electric vehicle for charging, communicate with the electric vehicle to identify a payment method associated with the electric vehicle and with the payment network to authorize the payment method for payment for electric power supplied to the electric vehicle for charging.

A method for maintaining state and event information for all of a user's devices associated in a common location using a blockchain where each block includes an event block and a device block within it, where each event and device block refers to an earlier block of the respective type, resulting in a blockchain-in-a-blockchain architecture. The device and event blocks store data regarding each device associated with a user and events related to the devices/user, respectively. Any time a new event occurs, or a device is registered or removed, a new set of blocks is created, where submissions regarding device changes or events can be made by any participant due to the decentralized and public nature of a blockchain. The result is a system where all data regarding a user's registered devices and events is kept in a common location in a manner that is auditable and verifiable.

A routing plane includes an authentication packaging system that receives client authentication information, as part of a request from a requesting client that is to be routed to a target service. The authentication packaging system combines the authentication information with assertion information indicative of an assertion as to the identity of the routing plane, using an entropy, such as a signing key. The authentication package is attached to the request and is sent to the target service. The target service validates the authentication package based on the entropy and authenticates the routing plane based on the assertion information and performs authentication processing based on the authentication information.