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参考サイト:
https://www.fe-siken.com/kakomon/29_aki/pm01.html

#デジタル署名とは
データの受信者側で送信元確認と改竄検知を行う仕組み。

#具体的には
以下の流れで、データ送信者の照合を行います。

[送信者]
メッセージダイジェスト(本文のハッシュ値)を「自身(送信者)の秘密鍵」で暗号化したものを本文に付けて送信

[受信者]
デジタル署名を「送信者の公開鍵」で複合

この一連の流れを図に表したのが、下になります。
degitalsyomei.png

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