CERT Lookup
Query CERT records to retrieve certificate information stored in DNS
CERT records store certificates and related data in DNS, enabling certificate distribution and validation through the DNS infrastructure.
Domain Lookup
Enter a domain name to query its CERT records
What are CERT Records?
CERT (Certificate) records are DNS resource records that store certificates and related cryptographic information in the Domain Name System. They enable the distribution of certificates through DNS infrastructure, providing an alternative method for certificate discovery and validation.
Key Components:
- Type: Specifies the certificate format (1 for PKIX, 2 for SPKI, 3 for PGP, etc.)
- Key Tag: A short numeric value that identifies the certificate
- Algorithm: The cryptographic algorithm used (RSA, ECDSA, etc.)
- Certificate: The actual certificate data in binary format
How CERT Records Work:
- Applications query DNS for CERT records of a specific domain
- DNS server returns available certificate information
- Client validates the certificate using standard PKI procedures
- Certificate can be used for encryption, authentication, or digital signatures
CERT records are defined in RFC 4398 and provide a standardized way to distribute certificates via DNS.
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