Digital Signature

Definition: A cryptographic method used to verify the integrity and authenticity of digital data. A digital signature confirms that a document or message originates from a specific sender and has not been altered.

Key Features:

  • Authenticity: Confirms the identity of the sender.

  • Integrity: Indicates whether the data has been altered since signing.

  • Non-repudiation: A sender cannot deny having signed the message.

Popular Standards:

  • RSA: A widely-used algorithm for creating digital signatures.

  • PKI (Public Key Infrastructure): A system of certificates, public and private keys for managing digital signatures.

Applications: E-commerce, digital contracts, email security, software distribution, and many other areas where verification of digital data is required.