METHOD AND SYSTEM FOR A CERTIFICATE-LESS AUTHENTICATION ENCRYPTION (CLAE)

摘要

A method of verifying a plurality of public parameters from a trusted center in an identity-based encryption system prior to encrypting a plaintext message by a sender having a sender identity string is described. The method includes identifying the trusted center by a TC identity string, the trusted center having an identity-based public encryption key of the trusted center based on the TC identity string; determining if the sender has a sender private key and the public parameters for the trusted center including the public encryption key of the trusted center and a bilinear map; and verifying the public parameters using the TC identity string prior to encrypting the plaintext message into a ciphertext by comparing values of the bilinear map calculated with variables comprising the sender private key and the public encryption key. The ciphertext may include an authentication component for authenticating the sender once the ciphertext is received and decrypted by the recipient using the identity string of the sender and the private key of the recipient.