Validation of the headquarters certificate
According to article 11.2 d) of Royal Decree 203/2021, of 30 March, approving the Regulation on the operation and operation of the public sector by electronic means, the electronic headquarters will have a system of verification of the certificates of the headquarters.
You will be able to verify the validity of the certificate of the electronic headquarters of the Tax Agency, directly and free of charge, through the VALIDe platform.
The headquarters certificates are useful for identifying the electronic headquarters and ensuring secure communication with them, so that they do not allow the malicious intrusion of third parties.
According to the ICT Security Guide CCN-STIC 807 Cryptology of employment in the National Security Scheme the cryptographic protocols and algorithms allowed in access to the electronic headquarters are:
TLS 1.2
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS 1.3
TLS_AES_128_GCM_SHA256
TLS_AES_256_GCM_SHA384
TLS_CHACHA 20_POLY1305_SHA256