Digital Signature

A Digital Signature is a cryptographic technique used to verify the authenticity and integrity of digital messages or documents. It acts as a virtual fingerprint, ensuring that the content hasn’t been altered and confirming the identity of the sender. Digital signatures are widely used in blockchain transactions, contracts, and secure communications.

Why It Matters

Digital signatures are crucial for maintaining trust and security in digital communications. They provide proof of origin, integrity, and non-repudiation, ensuring that the sender cannot deny the authenticity of the signed message or document. In blockchain, they secure transactions and prevent fraud.

How It Works

Digital signatures use asymmetric encryption, involving a private key to create the signature and a public key to verify it. When a message is signed, a hash of the message is encrypted with the sender’s private key. The recipient can use the sender’s public key to verify that the message hasn’t been tampered with.