Ciphper
| ID： | 666 |
|---|---|
| 标题： | Ciphper |
| 描述： | Background story: this code was once used on a REAL site to encrypt REAL data. Thankfully, this code is no longer being used and has not for a long time. A long time ago, one of the sites I was building needed to store some some potentially sensitive data. I did not know how to use any proper encryption techniques, so I wrote my own symmetric cipher. The encrypted content in **output.bin** is a well-known, olde English quote in lowercase ASCII alphabetic characters. No punctuation; jus |
| 类型： | Crypto |
| 网站： | bugku |
| 题目链接： | https://ctf.bugku.com/challenges/detail/id/796.html |
| 赛事： | TAMUctf2021 |
| 年度： | 2021 |
| Flag值： | First weakness in the cipher is the lack of encryption of the highest 3 bits. Use the whitespace to get the key length and a significant amount of the key. Fill in the blanks. |
| writeup： | https://ctftime.org/writeup/27905 |