DKIM Security Tools
Go beyond surface-level syntax checks. Mathematically prove your DNS records contain functioning RSA public keys. We decode raw ASN.1 structures and instantiate live cryptographic objects via our real-time .NET engine to verify exact bit-lengths and public exponents, eliminating false positives with zero simulated data.
Does your published DNS record actually contain a mathematically valid RSA public key? We will extract the Base64 string, attempt to instantiate an RSA cryptographic object, and verify its internal ASN.1 structure, Modulus, and Exponent.
Most tools simply check if your DNS record has a `p=` tag. Our DKIM Verification Tool goes deeper: it mathematically proves that the data inside the `p=` tag is a functioning cryptographic key.
SubjectPublicKeyInfo (X.509 standard for DKIM) and legacy PKCS#1 RSAPublicKey formats to help you debug compatibility issues.Your feedback has been submitted successfully. We appreciate your help in improving our tools.