The present invention provides a privacy protection method and a privacy protection apparatus in vehicle communication. The privacy protection method comprises the steps of acquiring a first secret key allocated by an operator, wherein after the operator allocates the first secret key, multiple pairs of (PMSI, KPMSI) are encrypted by using the first secret key and then are sent to an authentication management center; sending a request of signing a public key of a vehicle terminal to the operator, and receiving a signature result returned from the operator, wherein the operator uses a private key of the operator to sign the public key of the vehicle terminal; sending an identifier of the vehicle terminal, the public key of the vehicle terminal and a signature result to the authentication management center, and receiving at least one pair of (PMSI, KPMSI) that is encrypted by using the public key of the vehicle terminal and the first secret key and is sent by the authentication management center; and decrypting the received (PMSI, KPMSI) according to the first secret key and the private key of the vehicle terminal, and performing vehicle communication according to the decrypted (PMSI, KPMSI). Through adoption of the method and apparatus, the privacy security in vehicle communication is greatly improved.