ECDSA (Elliptic Curve Digital Signature Algorithm)

ECDSA (Elliptic Curve Digital Signature Algorithm) is a security method used to verify the authenticity of digital messages or transactions. It uses the mathematics of elliptic curves to create a unique digital signature for a sender’s information. When someone receives a message, they can check the signature with the sender’s public key to confirm it was genuinely from them and hasn’t been altered. This process ensures confidentiality, integrity, and authenticity, especially in applications like cryptocurrencies and secure communications, while maintaining relatively small key sizes for efficiency and security.