مقایسهٔ روش‌ها

	تابع هش SHA	طرح امضای دیجیتال
حوزه	رمزنگاری	رمزنگاری
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1993	1978
پدیدآور	National Institute of Standards and Technology (NIST)	Ronald Rivest, Adi Shamir, Leonard Adleman
نوع	One-way hash algorithm	Asymmetric signature algorithm
منبع بنیادین	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.
نام‌های دیگر	SHA-1, SHA-256, SHA-512, Secure Hash Algorithm	Digital Signature Algorithm, Message Authentication and Integrity, Public Key Signature
مرتبط	4	4
خلاصه	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.