pwnyuan's blog

Break repeating-key XORThere's a file here. It's been base64'd after being encrypted with repeating-key XOR.Decrypt it.Here's how:1. Let KEYSIZE be the guessed length of the key; try values from 2 to (say) 40.2. Write a function to compute the edit

Implement repeating-key XORHere is the opening stanza of an important work of the English language:Burning 'em, if you ain't quick and nimbleI go crazy when I hear a cymbalEncrypt it, under the key "ICE", using repeating-key XOR.In repeating-key XOR

Detect single-character XOROne of the 60-character strings in this file has been encrypted by single-character XOR.Find it.Your code from #3 should help.)关于这个，我的想法是读取文件，并将其每行字符串进行challenge3中的操作，最终选择得分最高的的字符串。对此，我只需要在challenge3的基础上修改一下下就行，但不知为何始终出不来

Fixed XORWrite a function that takes two equal-length buffers and produces their XOR combination.If your function works properly, then when you feed it the string:1c0111001f010100061a024b53535009181c... after hex decoding, and when XOR'd against:686

Single-byte XOR cipherstring:1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736descript:... has been XOR'd against a single character. Find the key, decrypt the message.You can do this by hand. But don't: write code to do it for you

Convert hex to base64string:49276d206b696c6c696e6720796f757220627261696e206c696b65206120706f69736f6e6f7573206d757368726f6f6dshould produce:SSdtIGtpbGxpbmcgeW91ciBicmFpbiBsaWtlIGEgcG9pc29ub3VzIG11c2hyb29tdescript:So go ahead and make that happen. Yo