Σύγκριση μεθόδων

	Ψηφιακή Υπογραφή	Συνάρτηση κατακερματισμού SHA
Πεδίο	Κρυπτογραφία	Κρυπτογραφία
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1978	1993
Δημιουργός	Ronald Rivest, Adi Shamir, Leonard Adleman	National Institute of Standards and Technology (NIST)
Τύπος	Asymmetric signature algorithm	One-way hash algorithm
Θεμελιώδης πηγή	Rivest, R. L., Shamir, A., & Adleman, L. (1978). A method for obtaining digital signatures and public-key cryptosystems. Communications of the ACM, 21(2), 120–126.	National Institute of Standards and Technology (1993). Secure Hash Standard (SHS). Federal Information Processing Standards (FIPS) Publication 180.
Εναλλακτικές ονομασίες	Digital Signature Algorithm, Message Authentication and Integrity, Public Key Signature	SHA-1, SHA-256, SHA-512, Secure Hash Algorithm
Συναφείς	4	4
Σύνοψη	A digital signature scheme provides authentication, integrity assurance, and non-repudiation of electronically signed documents. Using public-key cryptography (such as RSA, DSA, or ECDSA), the originator signs a message with a private key in a way that any recipient can verify the signature using the originator's public key, proving that the message was created by the claimed author and has not been tampered with.	The Secure Hash Algorithm (SHA) is a family of cryptographic hash functions standardized by NIST starting in 1993. SHA functions produce fixed-length digests from arbitrary-length input data, serving as a fundamental building block for digital signatures, message authentication, and data integrity verification across security-critical applications.