This extension provides server-side verification for ECDSA SHA-256 digital signatures generated by iOS and Android mobile devices using hardware-backed Elliptic Curve (NIST P-256) keys. It automatically normalizes cross-platform public key structures (iOS ANSI X9.63 and Android DER SubjectPublicKeyInfo) and converts mobile ASN.1 DER signatures into the IEEE P1363 format required by the .NET Framework, allowing seamless biometric challenge-response verification on the OutSystems backend.