39 lines
1.3 KiB
Markdown
39 lines
1.3 KiB
Markdown
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# xor-vigenere
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xor-encoded vigenere cypher decoder for ru-ru alphabet.
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Decodes uppercase text without white spaces and Ë letter.
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## Build
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Requires [go1.19](https://go.dev/dl/)
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```
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$ go build .
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```
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## Usage
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Specify input file and wait for result.
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```
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$ ./xor-vigenere -i example/cipher.txt -r 2
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Cypher text file: example/cipher.txt
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Parallel workers: 12 (override with -w flag)
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Trying to predict secret key length ... 8 (override with -l flag)
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Cypher text sample size to analyze: 2000 (override with -s flag)
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Number of letters in permutations: 4 [ОЕАИ] (override with -p flag)
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Number of results to show: 2 (override with -r flag)
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Analyzing 100% [##################################################] (65536/65536, 36315 keys/s)
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Key=АБЫРВАЛГ Sample:ГДЕЖЕВЕСЬМИРВДЕНЬМОЕГОРОЖДЕНИЯГДЕЭЛЕКТРИЧЕСКИЕФО Div:0.145333
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Key=АЙЫРВАЛГ Sample:ГМЕЖЕВЕСЬДИРВДЕНЬДОЕГОРОЖМЕНИЯГДЕХЛЕКТРИЧНСКИЕФО Div:0.166576
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Execution duration: 1.805705397s
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```
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`АБЫРВАЛГ` is a valid secret key on top.
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To receive better (but slower) results use:
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- bigger sample size for analyzing cypher text (`-s 0` for analyzing whole text)
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- look through more possible keys (`-r` flag)
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- use more frequently used letters to create more permutations (slows **really** hard, `-p` flag)
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