Crypto

Cipher software, known weaknesses have been removed.

Features

• word encoding instead of letter encoding
• up to 4,000 rotors
• each rotor will have 46,655 values
• same rotor can be used multiple times
• up to 500 plugboards
• each plugboard will have 46,655 values
• no reflector, value can map to itself
• random step size for each rotor
• random direction rotor rotation
• same passphrase & recipient handle can be used for all messages
• random seed generation, Crypto will never encrypt a message using the same settings
• ability to randomize word directory for increased security

Usage

• explorer: double click crypto.jar
• command line: java -Xmx2g -jar crypto.jar
• rotor count is limited by java heap size
• accepted text characters: A-Z, a-z, 0-9, standard punctuation

Encrypt Usage

• enter rotor/plugboard count
• enter pass phrase, this can be anything (both parties must have this information)
• enter recipient email/handle, this can be anything recipient specific (both parties must have this information)
• enter text
• press encrypt button

Decrypt Usage

• enter rotor/plugboard count (same as used to encrypt message)
• enter pass phrase (same as used to encrypt message)
• enter recipient email/handle (same as used to encrypt message)
• enter encrypted text
• press decrypt button

Dependencies

• Apache Commons
• siphash
• log4j
• junit

References

https://en.wikipedia.org/wiki/Enigma_machine
https://en.wikipedia.org/wiki/Enigma_rotor_details
https://en.wikipedia.org/wiki/Fialka
http://www.cryptomuseum.com/crypto/enigma/working.htm
https://en.wikipedia.org/wiki/SIGABA