33 results about "Commutative encryption" patented technology

Disclosed is a domain DRM system, a license sharing method for the domain DRM system, and a license server. The domain DRM system includes at least one domain including at least one user module adapted for encryption or decryption using a provided encryption key and a domain manager adapted for decryption using a provided encryption key, and a license server for creating encryption keys corresponding to the domain manager and the one user module, respectively, and providing them with the created contents, respectively, so that, when at least one user module requests contents, a contents encryption key used to encrypt the contents is encrypted by using an encryption key of the user module and an encryption key of the domain manager according to a commutative encryption scheme, and one of the domain manager and the user module is provided with a shared license obtained as a result of encryption.

A method, system, and non-transitory computer readable medium are described for providing a sender a plurality of ephemeral keys such that a sender and receiver can exchange encrypted communications. Accordingly, a sender may retrieve information, such as a public key and a key identifier, for the first receiver from a local storage. The retrieved information may be used to generate a key-encrypting key that is used to generate a random communication encryption key. The random communication encryption key is used to encrypt a communication, while the key-encrypting key encrypts the random communication key. The encrypted communication and the encrypted random communication key are transmitted to the first receiver.

The present application describes a method, system, and non-transitory computer-readable medium for exchanging encrypted communications using hybrid encryption. According to the present disclosure, a first device receives an encrypted communication from a second device. The encrypted communication includes a first encrypted secret, a second encrypted secret, a first signature, and a second signature. The first device verifies the first signature and the second signature, and, when the first and second signatures are valid, decrypts the first encrypted secret using a first encryption algorithm and the second encrypted secret using a second encryption algorithm. The first device combines the first decrypted secret and the second decrypted secret to recover a first communication and provides the first communication to a user of the first device.

The invention discloses an encryption-based wireless unlocking method. The encryption-based wireless unlocking method comprises the following steps of entering an unlocking process; reporting the effective unlocking time range, the authority range and the unlocking reason of a designated lock to an unlocking management platform to apply for an unlocking authority; through the unlocking managementplatform, handing the unlocking authority application to an administrator for examination and approval, who corrects an appropriate time range and an appropriate authority range to complete examination and approval; then generating authorization data via the unlocking management platform; via the unlocking management platform, delivering the authorization data to a wireless terminal, which exchanges encrypted data with the lock; encrypting the authorization data in the wireless data and transmitting the encrypted authorization data to the lock; verifying the encrypted authorization data in thelock to determine whether the encrypted authorization data are legal, if so, unlocking the lock; else, quitting the unlocking process. The encryption-based wireless unlocking method has the advantages of achieving authorization controllability and ensuring key safety, authorization safety and lock safety.