E-CTF比赛 Write Up 目录E-CTF比赛 Write Up1. Cryptography(密码学)ASCII me anything but not the flagOIIAIOIIIAI 😼Hashes BinderRSA introCracking the Vault
et al., "Comparing the MOV and FR Reductions in Elliptic Curve Cryptography" (Section 2) :param P: the base point :param R: the point multiplication result :param max_k: the maximum value of embedding degree to try (default: 6) :param max_tries: the maximum amount of times to try ...
Cryptography:::merda 打开出现一段密文,看样子推测是凯撒密码 merda 解题思路:复制密文到凯撒密码的解密网站中,位移5位flag就出来了,flag是[2] Cryptography:::flawed 开始以为是要丢到hash去接,原来这只是一个MD5 解题思路:打开一个md5解密的网站,复制进去即可,flag是[3] Cryptography:::s̸̾̀͊͠...
The Cryptographer boyfriend: You meant to say it's you XOR cryptography. The Girlfriend: I am leaving you. roXen.py #!/usr/bin/env pythonfromCrypto.Util.numberimport*fromsecretimportexp, flag, nbitassertexp & (exp +1) ==0defadlit(x): l =len(bin(x)[2:])return(2** l -1) ^ ...
43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. FLAG ifyouthinkcryptographyistheanswertoyourproblemthenyoudonotknowwhatyourproblemisabcdefghijklmnopqrstu 参考: 作者:damedane-qiuqiu
Case loss:Cryptography:500pts DNA:Warmup:200pts EZBinary:Binary:250pts Weird Colors:Steganography:700pts Look in the shadow:Steganography:300pts Weird sounds:Cryptography:700pts Creds:Binary:300pts Electrical:Steganography:500pts Harekaze mini CTF 2021 (2021/12/24) Harekaze mini CTF 2021 623 Points...
using System.Security.Cryptography; using System.Text; internal class Demo{ private static string one(string A_0){ byte[] bytes = Encoding.ASCII.GetBytes(A_0); return "flag{" + BitConverter.ToString(new MD5CryptoServiceProvider().ComputeHash(bytes)).Replace("-", "") + "}"; ...
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---CRYPTO(密码学):全称Cryptography。题目考察各种加解密技术,包括古典加密技术、现代加密技术甚至出题者自创加密技术。实验吧“角斗场”中,这样的题目汇集的最多。这部分主要考查参赛选手密码学相关知识点。 ---REVERSE(逆向):全称reverse。题目涉及到软件逆向、破解技术等,要求有较强的反汇编、反编译扎实功底。需要...
在学习了凯撒大帝使用的神奇密码后,密码前辈们有创造出了更为奇异的加密方法。本题出题者喜欢用helloworld当密钥,密文如下:dlpcsegkshrij,请破解后提交。附录是一张似乎有用的表。答案为非常规形式。 希尔(Hill)密码:基于矩阵乘法 在线工具:http://www.practicalcryptography.com/ciphers/hill-cipher/...