手法を比較

	RSA暗号方式の分析	ディフィー・ヘルマン鍵交換
分野	暗号学	暗号学
系統	Process / pipeline	Process / pipeline
提唱年	1978	1976
提唱者	Ronald Rivest, Adi Shamir, Leonard Adleman	Whitfield Diffie, Martin Hellman
種類	Asymmetric encryption and signature algorithm	Asymmetric key exchange algorithm
原典	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.
別名	RSA Analysis, Rivest–Shamir–Adleman Analysis	DH Key Exchange, Diffie-Hellman Key Agreement
関連	4	4
概要	RSA (Rivest–Shamir–Adleman) is a foundational asymmetric cryptosystem introduced in 1978 that enables both encryption and digital signatures using a pair of public and private keys. It remains one of the most widely deployed cryptographic algorithms in modern security infrastructure, supporting secure communication and authentication across the internet.	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.