Σύγκριση μεθόδων

	Συνάρτηση κατακερματισμού SHA	Ψηφιακή Υπογραφή
Πεδίο	Κρυπτογραφία	Κρυπτογραφία
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1993	1978
Δημιουργός	National Institute of Standards and Technology (NIST)	Ronald Rivest, Adi Shamir, Leonard Adleman
Τύπος	One-way hash algorithm	Asymmetric signature algorithm
Θεμελιώδης πηγή	National Institute of Standards and Technology (1993). Secure Hash Standard (SHS). Federal Information Processing Standards (FIPS) Publication 180.	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.
Εναλλακτικές ονομασίες	SHA-1, SHA-256, SHA-512, Secure Hash Algorithm	Digital Signature Algorithm, Message Authentication and Integrity, Public Key Signature
Συναφείς	4	4
Σύνοψη	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.	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.