zjnuctf-crypto-writeup
1.md5+sha256
1 | 有人说md5加密和sha256加密是不可逆的,事实真的是这样吗?我窃取到了出题者的名字和生日泄露的信息你能帮我求出出题者的名字和生日吗 |
md5/sha256:https://www.cmd5.com
明文:md5(名字)=x1ao,sha256(生日)=0101
flag:flag{x1ao0101}
2.morse
1 | ..-. .-.. .- --. ----.-- -- ----- .-. ... . -.-. .. .--. .... . .-. -----.- |
morse:https://www.lddgo.net/encrypt/morse
明文:FLAG%u7bM0RSECIPHER%u7d(注:%u7b={ %u7d=} )
flag:flag{m0rsecipher}
3.url
1 | %66%6c%61%67%7b%61%6e%64%20%31%3d%31%7d |
url:https://www.toolhelper.cn/EncodeDecode/UrlEncodeDecode
flag:flag{and 1=1}
4.eazy
1 | 提示:一只兔子翻过一个栅栏 |
rabbit:https://www.sojson.com/encrypt_rabbit.html
f_tbrnlAri_mse_eca{abci_vafegblo_}
fance:https://ctf.bugku.com/tool/railfence (注:w型分四栏)
flag:flag{A_rabbit_climbs_over_a_fence}
5.变异凯撒
1 | 提示:最近刚复习了等差数列,什么!?这凯撒里有等差数列=== |
脚本:
1 | a='gofncsvh_ttzpzs_fnwqpe_xj_t_wfs_twwhwrr' |
flag:flag{this_caesar_cipher_is_a_bit_strange}
6.指北(一)
1 | 这是一个有用的crypto指北,相信你会喜欢上crypto |
vigenere:https://www.guballa.de/vigenere-solver(注:不需要密钥)
明文:https://www.guballa.de/vigenere-solver this is a very useful URL dedicated to decrypting Virginia passwords without a key. There are still many similar URLs that you need to explore slowly, so I won’t tell you here, ha, since you have decrypted it, then give you the flag:flag{Another_f1le_1s_Useful}
flag:flag{Another_f1le_1s_Useful}
