方法对比

	数字签名方案	迪菲-赫尔曼密钥交换
领域	密码学	密码学
方法族	Process / pipeline	Process / pipeline
起源年份	1978	1976
提出者	Ronald Rivest, Adi Shamir, Leonard Adleman	Whitfield Diffie, Martin Hellman
类型	Asymmetric signature algorithm	Asymmetric key exchange algorithm
开创性文献	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.	Diffie, W., & Hellman, M. E. (1976). New directions in cryptography. IEEE Transactions on Information Theory, 22(6), 644–654.
别名	Digital Signature Algorithm, Message Authentication and Integrity, Public Key Signature	DH Key Exchange, Diffie-Hellman Key Agreement
相关	4	4
摘要	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 Diffie-Hellman key exchange, invented by Whitfield Diffie and Martin Hellman in 1976, is a foundational protocol for establishing a shared secret over an insecure communication channel. Two parties who have never previously communicated can use Diffie-Hellman to agree on a symmetric encryption key that an eavesdropper cannot easily derive, even after observing all public exchanges.