قارن الطرق

	نظام التوقيع الرقمي	دالة التجزئة SHA
المجال	علم التعمية	علم التعمية
العائلة	Process / pipeline	Process / pipeline
سنة النشأة	1978	1993
صاحب الطريقة	Ronald Rivest, Adi Shamir, Leonard Adleman	National Institute of Standards and Technology (NIST)
النوع	Asymmetric signature algorithm	One-way hash algorithm
المصدر التأسيسي	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.
الأسماء البديلة	Digital Signature Algorithm, Message Authentication and Integrity, Public Key Signature	SHA-1, SHA-256, SHA-512, Secure Hash Algorithm
ذات صلة	4	4
الملخص	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.