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@trgw

IPA基本情報技術者試験で混同しがちな公開鍵暗号方式によるメッセージの暗号化及び複合とディジタル署名の検証による送信者の正当性の確認

Last updated at Posted at 2023-11-04

メッセージの暗号化

受信者の目的：複合
送信者が受信者の公開鍵で暗号化し、
受信者が受信者の秘密鍵で複合する
image.png

ディジタル署名の検証

受信者の目的：送信者の正当性の確認
送信者が送信者の秘密鍵でディジタル署名を生成し、
受信者が送信者の公開鍵で署名を複合し（ハッシュ値の比較により）送信者の正当性を確認する。
image.png

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