How do I decrypt a string using an unknown encryption algorithm?
How to decrypt a string with an unknown encryption algorithm?
There is a line:
5aaC5p6c5L2g5a + 55oiR5Lus5Zyo5YGa55qE5LqL5oOF5pyJ5YW06Laj77yM5bm25LiU5a + 5cmFpbHMv5YmN56uv5byA5Y + R5pyJ6Ieq5L + h77yM5qyi6L + O5Y + R6YCB6YKu5Lu25YiwZ2hvc3RtNTVAZ2l0Y2FmZS5jb23pooTnuqbkuqTmtYHml7bpl7TvvIznoa7lrprkuYvlkI7lj6 / ku6Xnm7TmjqXmnaXliLDmiJHku6znmoTlt6XkvZzlrqTlj4Lop4LkuqTmtYHvvIzosKLosKIK
I don't know the encryption algorithm. How to decode it?
To analyze and solve this problem, what should I find out?
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This is not an encryption algorithm, but base64. You can tell because of the + s.
http://www.opinionatedgeek.com/dotnet/tools/base64decode/
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NOTE. If it was actually encrypted, and you didn't really know what it was encrypted in, you would be screwed, because any good encryption algorithm turns the output into meaningless gibberish, unusable without a key. Base64 doesn't have a key, you can just change it the same way every time.
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Well, the string is most likely Base64 encoded. If you decode it, you should get an effective random piece of binary data if you encrypt it (EDIT: as others have shown, it is not encrypted, but the following would apply if it was)
By checking the length, you can determine the size of the encryption block. If it is not an even block size, it could probably be a stream cipher (or a block cipher operating in stream mode).
However, more information will need to be enlightened from other sources - since the point of good encryption is to make the data truly opaque.
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Its encryption is Base 64. The above code translates as:
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HOW DO YOU TURN IT INTO ENGLISH?
qꬺ · jɨz כⅉ k "本 μ ° 嬒 糝 ¨v © jY ݮ <" GG 鍊 鼱 d% ^ 3ź ゛ * nzhŶ٤vfǠª 轇 ົ k ² ² ² ²iɸ ک² a-HD1e ּ SRE ӑBSX0￥%4, QHaIT rNHV$°a0 LdH0,u
° 0 N N0 N 0 r NNNNNN ӑBSX0￥%4, QHaIT rNHV$°a0 LdH0,u
° ii 8 2eE҅H8AÁ1EX3ψLϴ0V! H8ky 栿 m¶ÿbq "vjz [! ¢) | mxþ ޤ Zv]? WƉ: 䃬 ԍ¼˱
w ± B! 榚 5¦wq] Ŝ¿tr ᒇ \ ߗ r'fɕɕ V¬o9ҝ 뮞 u ־µ 罻 Ԟº¿⍶Ӯz 콯 Mv 뎴 潺 썶 ۽´ {ﭸࠝ㎷ ӎ¹ ڍ1 ~ 5] ֽµ] ¸ ߶ 掵 ⯹ 칯 η η 췯 {ꎼ ﷳ ^ ºͬm¶ÿbq "vjz [! ¢ ؚ 廓 6o¾̜⭛kɧZ² 艛 ³ {SY; ^ Ŋ 黇 ̕ѱ³ R̕ѱ 湃 5Q´". 熫 ^ ǽ 缲 ҥ 쑣떜 Ϟɋ 脗 ʵS ν 듴 Q (6 ۪ O
° ϞT. ¨x ¹ r +) wf @ ³ 絢 뀜, UȻU = ´ / $$ "숭, bp 엻 խ R.¯¿鿺
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