Re: [請問] 兩題資安導論 elgamal / RSA:Realtime－2016韓劇推薦排行榜 , 2016韓劇推薦好看的 , 2016韓劇推薦必看 , 2016韓劇 , 2016韓劇排行榜前十名 , 韓劇推薦 ,

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Re: [請問] 兩題資安導論 elgamal / RSA

Jan 20th 2015, 03:33, by sixthday

作者sixthday (姬[TORCH])

看板ask

標題Re: [請問] 兩題資安導論 elgamal / RSA

時間Tue Jan 20 03:33:52 2015

※ 引述《irenelove (irenelove)》之銘言： : Q1: Consider an ElGamal scheme between Alice and Bob with a common : prime q=71 and a primitive root α=7. Alice 和 Bob 用 ElGamal 加密溝通選了一個質數 q=71 和它的原根 α=7 : 1. If Bob has public key Y_B=3 and Alice chooses the random integer k=2, : what is the ciphertext of M=30? 如果 Bob 的公開鑰 Y_B=3 Alice 的隨機整數 k=2 請問 M=30 加密後是多少 : 2. If Alice now chooses a different value of k so that the encoding of M=30 : is C=(59,C_2 ), what is the integer C_2? 如果 Alice 選了另一個值作為 k 用這個 k 加密 M=30 後是 C=(59,C_2 ) 那 C_2 是啥 : Q2: Suppose Alice and Bob use a RSA with : p q n e : Alice 11 5 55 9 : Bob 13 7 91 11 : Alice want to send plaintext x=5 to Bob by using both RSA encryption and : digital signature. Please note that only plaintext is used for RSA : encryption. Please show the ciphertext y, signature s, and how Bob ensure : this message is sent by Alice. Alice 想要寄明文 x=5 要給 Bob 雙方都用 RSA 加密與數位簽章只有明文是用在 RSA 加密請寫出密文 y 簽名 s 以及 Bob 怎麼驗證這訊息是 Alice 寄的 RSA 的 pqne 如表格 : 看完投影片還是不太會寫不知道那些代號是什麼跪求幫忙> 翻譯完畢然後你要的代號這邊都找得到 http://security.nknu.edu.tw/textbook/chap3.pdf http://security.nknu.edu.tw/textbook/chap5.pdf -- SONICO is busty. She makes our people horny. -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 220.133.124.133 ※ 文章網址: https://www.ptt.cc/bbs/ask/M.1421696038.A.9D5.html ※ 編輯: sixthday (220.133.124.133), 01/20/2015 03:34:15 ※ 編輯: sixthday (220.133.124.133), 01/20/2015 03:35:34

推 irenelove: 感謝你~~ 等下來好好研究一下 01/20 03:36

※ 編輯: sixthday (220.133.124.133), 01/20/2015 03:49:45 剛剛發現有地方翻錯修正一下另外補上 RSA 數位簽章的連結 ※ 編輯: sixthday (220.133.124.133), 01/20/2015 03:52:17

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