The Elliptic Curve Digital Signature Algorithm (ECDSA)

Public-Key Cryptography Standard (PKCS)
Public-Key Cryptography Standard (PKCS) #1, RSA Cryptography Standard, defines mechanisms for encrypting and signing data using the RSA algorithm. PKCS #1 v2.1 specifies
two digital signature processes and corresponding formats:

1. RSASSA-PKCS1-v1.5 and
2. RSASSA-PSS.

Both signature schemes are Approved for use, but additional constraints are imposed beyond those specified in PKCS #1 v2.1.

1. Implementations that generate RSA key pairs shall use the RSA criteria and the method in B.3.2 to generate those key [..]

DSA Signature Verification and Validation

Signature verification may be performed by any party (i.e., the signatory, the intended recipient or any other party) using the signatory’s public key. A signatory may wish to verify that the computed signature is correct, perhaps before sending the signed message to the intended recipient.

The intended recipient (or any other party) verifies the signature to determine its authenticity.

Prior to verifying the signature of a signed message, the domain parameters, and [..]