| A\_Canonical Public Key | Public key generated by ITS-Station and used by the EA to verify EC request signature. | Integrity |
| A\_Data encryption key | AES key used to encrypt requests and responses messages data. | Integrity, confidentiality |
| A\_CA private keys | Private keys corresponding to the public keys contained in CA certificates issued by the PKI system. These keys are used for signature/encryption mechanisms. | Confidentiality, integrity |