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@Jochun

[Cryptosystem] 共通鍵暗号方式、公開鍵暗号方式、デジタル署名について

Last updated at Posted at 2024-08-05

早見表

共通鍵暗号方式 公開鍵暗号方式 デジタル署名
キー名 共通鍵 公開鍵、秘密鍵 公開鍵、秘密鍵
キー所有者 送信者、受信者 受信者 送信者
使用方法 共通鍵で暗号化、復号 公開鍵で暗号化
秘密鍵で復号		 秘密鍵で暗号化（署名）
公開鍵で復号（検証）
実装方式 AES
DES		 RSA
楕円曲線暗号
ElGamal
n人の通信の
必要な鍵数		 n(n-1)/2 2n

参考リンク

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