Digital signature

From CryptoDox, The Online Encyclopedia on Cryptography and Information Security

A digital signature is an electronic signature that can be used to authenticate the identity of the sender of a message or the signer of a document, and possibly to ensure that the original content of the message or document that has been sent is unchanged. Digital signatures are easily transportable, cannot be imitated by someone else, and can be automatically time-stamped. The ability to ensure that the original signed message arrived means that the sender cannot easily repudiate it later. To be effective, digital signatures must be unforgeable.

Digital Signature Algorithms

• DSA
• ECDSA
• Schnorr signature
• Undeniable signature
• ElGamal signature scheme
• Rabin signature algorithm
• Pointcheval-Stern signature algorithm
• SHA (typically SHA-1) with RSA
• Full Domain Hash, RSA-PSS etc., based on RSA

Laws & Regulations on Digital Signatures

There are country specific Laws and Regulations on Digital Signatures.

External Links

• Electronic Privacy Information Center - Digital Signatures
• An Introduction to Digital Signatures

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