Data sending method and device and data receiving method and device

Abstract

The invention discloses a data sending method applied to a sending end. Signcryption can be conducted on to-be-sent data through double private keys and an elliptic curve encryption algorithm, and therefore data safety can be improved. A secret key of the elliptic curve encryption algorithm is shorter and smaller and signcryption calculation amount is smaller, so that signcryption efficiency and data sending efficiency can be improved. Flexibility and safety are higher. Correspondingly, a data sending device and a data receiving method and device provided by the invention also have the above technical effects.

Description

technical field [0001] The present application relates to the technical field of information security, in particular to a data sending method and device, and a data receiving method and device. Background technique [0002] In the prior art, in order to improve data security, when sending data, the sending end encrypts the data first, and then sends the encrypted data to the receiving end. Among them, when the sending end encrypts data, it often uses a key pair to encrypt data, such as: the sending end encrypts data with a private key, and the receiving end decrypts data with a corresponding public key. [0003] At present, the sender usually uses a single private key to encrypt data, and correspondingly, the receiver uses the public key corresponding to the private key to decrypt the data, that is, the whole process uses a pair of keys (that is, the private key and the public key of the sender), so its Security needs to be improved. Moreover, commonly used encryption algo...

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