E-Office certificate validation

According to article 11.2 d) of Royal Decree 203/2021, of March 30, which approves the Regulations for the action and operation of the public sector by electronic means, electronic offices will have a system for verifying the certificates of the office.

You can verify the validity of the certificate from the electronic headquarters of the Tax Agency, directly and free of charge, through the platform VALIDe .

The purpose of headquarters certificates is to identify the electronic headquarters and guarantee secure communication with them, thereby preventing malicious intrusion by third parties.

According to the CCN-STIC 807 ICT Security Guide Cryptology for use in the National Security Scheme, the cryptographic protocols and algorithms allowed for 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_CHACHA20_POLY1305_SHA256

Note. The TLS 1.3 configuration will not be activated on www1.agenciatributaria.gob.es to ensure compatibility with all Electronic DNI models.