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DER
A strict binary format for encoding structured data such as cryptographic certificates.
DER (Distinguished Encoding Rules) is a canonical byte-level encoding of ASN.1, the schema language used to describe certificates and keys. 'Canonical' means each value has exactly one valid encoding, which matters for signatures. Because DER data often arrives from untrusted sources, microZeus notes a DER reader 'built for hostile input' — hardened against malformed data.
See also
- ECDSAA widely used way to create and verify digital signatures using elliptic-curve math.
- ECDSA P-256ECDSA signatures using the specific, widely trusted NIST P-256 elliptic curve.
- differential oracleA testing method that checks your code by comparing its output, byte for byte, against a trusted reference implementation.