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CTFlearn-Encryption Master
阅读量:317 次
发布时间:2019-03-03

本文共 2839 字,大约阅读时间需要 9 分钟。

直接给了密文

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

尝试解密

结尾两个=, 尝试base64

Nice! Now keep going. 54776f206d6f72652e203031303030313130203031313031303031203031313031313130203031313030303031203031313031313030203030313030303030203031303030313030203031313030313031203031313030303131203031313130303130203031313131303031203031313130303030203031313130313030203031313031303031203031313031313131203031313031313130203030313030303031203030313030303030203031303130303031203030313130303031203031303130303130203031303030313131203031313030313031203030313130303030203031313031313030203031313030313130203031303130303031203031303130313031203030313130303031203031313030313130203031303130313031203031303030313130203031303031303130203031303130303030203031303130313130203031303130313031203031303130303130203031313030313130203031303130313030203030313130303030203031303131303130203031313030313130203031303130313131203031303130313031203030313131303031203031303130313130203031313030313130203031303130303031203030313131313031203030313131313031

拿到类似16进制的密文, 尝试hex

wo more. 01000110 01101001 01101110 01100001 01101100 00100000 01000100 01100101 01100011 01110010 01111001 01110000 01110100 01101001 01101111 01101110 00100001 00100000 01010001 00110001 01010010 01000111 01100101 00110000 01101100 01100110 01010001 01010101 00110001 01100110 01010101 01000110 01001010 01010000 01010110 01010101 01010010 01100110 01010100 00110000 01011010 01100110 01010111 01010101 00111001 01010110 01100110 01010001 00111101 00111101

看出来是二进制, 接着走

Final Decryption! Q1RGe0lfQU1fUFJPVURfT0ZfWU9VfQ==

再来base64, 得到flag

CTF{I_AM_PROUD_OF_YOU}

总结

base64

hex
binary
base64

就这?

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