sudo apt install bsdgames
Tools
Classical
| What | Link |
|---|---|
| Geocaching Toolbox (many classic crypto decoders) | http://www.geocachingtoolbox.com/index.php |
| Substitution Cipher Fiddle | http://ba.net/util/cipher2/cipher.html |
| Substitution Cipher Autosolver | http://www.quipqiup.com/index.php |
| ROT cipher (caesar) decoder (outputs all possible rotations) | http://planetcalc.com/1434/ |
| Rail fence cipher decoder | http://rumkin.com/tools/cipher/railfence.php |
| Bacon cipher decoder | http://rumkin.com/tools/cipher/baconian.php |
| Vigenere cipher decoder | http://www.guballa.de/vigenere-solver |
| Polybius cipher breaker | http://www.dcode.fr/polybius-cipher |
Modern
| What | Link |
|---|---|
| Prime factorization (using database) | factordb.com |
| factordb CLI + python library | pypi github |
| RSA calculator | https://www.cs.drexel.edu/~introcs/Fa11/notes/10.1_Cryptography/RSA_Express_EncryptDecrypt.html |
| RSA worksheet | https://www.cs.drexel.edu/~introcs/Fa11/notes/10.1_Cryptography/RSAWorksheetv4d.html |
| RSA python lib | https://pypi.python.org/pypi/rsa |
| Discrete logarithm calculator | http://www.alpertron.com.ar/DILOG.HTM |
Hashing
| What | Link |
|---|---|
| Online Hash database | https://hashkiller.co.uk/ |
| John the Ripper | ubuntu apt tool, use Jumbo version for extra functionality http://www.openwall.com/john/ |
MD5 - 32 characters
SHA1 - 40 characters
Documentation
Classical
| What | Link |
|---|---|
| Rail Fence Cipher | wikipedia |
| Scytale cipher | scytale cipher |
Modern
Hashing GOST hashing algorithm: http://en.wikipedia.org/wiki/GOST_%28hash_function%29
Tips and Tricks
$ echo 'hello, world' | rot13
uryyb, jbeyq
$ echo 'hello, world' | caesar 1
ifmmp, xpsme