Elliptic Curve Digital Signature Algorithm (ECDSA)

Elliptic Curve Digital Signature Algorithm (ECDSA) is a Digital Signature Algorithm (DSA) which uses keys derived from elliptic curve cryptography (ECC). While functionally providing the same outcome as other digital signing algorithms, because ECDSA is based on the more efficient elliptic curve cryptography, ECDSA requires smaller keys to provide equivalent security, and therefore more efficient.

Frequently Asked Questions
What is elliptic curve cryptography used for?

Elliptic-curve cryptography (ECC) is type of public-key cryptography based on the algebraic structure of elliptic curves over finite fields. ECC requires smaller keys compared to non-EC cryptography (i.e. RSA) to provide equivalent security, and therefore preferred when higher efficiency is required or stronger security (via larger keys).

ECC is used for key agreement, digital signatures, pseudo-random generators and other tasks.

What is ECDSA certificate?

A public key certificate, also known as a digital certificate or identity certificate, is an electronic document used to prove the ownership of a public key. The certificate includes information about the key, the identity of its owner (called the subject), and the digital signature of an entity that has verified the certificate’s contents (called the issuer).

An ECDSA certificate is a public key certificate where the public key and also certificate signing keys are derived from elliptic curve cryptography.

What is ecdhe_ecdsa?

ECDSA key can refer to a private or public key belonging to the ECDSA key pair. In digital signatures, the private key is used to sign messages and the public key is used to verify the authenticity of the signature.

What is ECC algorithm?

Elliptic-curve cryptography (ECC) is type of public-key cryptography based on the algebraic structure of elliptic curves over finite fields. ECC requires smaller keys compared to non-EC cryptography (i.e. RSA) to provide equivalent security, and therefore preferred when higher efficiency is required or larger keys.

ECC is used for key agreement, digital signatures, pseudo-random generators and other tasks.