Cryptography |

“Cryptography” is data encryption and decryption application based on Data Encryption Standard (DES) and Merkle-Hellman knapsack cryptosystem. The application has written on Java SE 8.

How to build local

~/> git clone https://github.com/GUSAR1T0/Cryptography.git
~/> cd Cryptography
~/Cryptography> ./gradlew build
:compileJava
:processResources
:classes
:jar
:assemble
:compileTestJava
:processTestResources
:testClasses
:test
:check
:copyDeps
:copylib NO-SOURCE
:build

BUILD SUCCESSFUL

Total time: 8.197 secs
~/Cryptography> _

When you execute the last command, you will see the message status of it. Remember only BUILD SUCCESSFUL message will be positive result of build.

How to use

This application has the certain list of options which used for running via command line interface:

usage: Cryptography
 -c,--cipher <arg>   Encrypt or decrypt, if it is not stated, program will do both cipher modes simultaneously
 -k,--generate-key   Generate one key for encryption of all files, it is only for data which should be encrypted
 -p,--path <arg>     Paths to files, can be used several times or never

Examples of usage

Encryption without key generation: ~/Cryptography/build/libs> java -jar Cryptography.jar -c=encrypt p=<path1> p=<path2> ... p=<pathN>
Encryption with key generation: ~/Cryptography/build/libs> java -jar Cryptography.jar -c=encrypt -k p=<path1> p=<path2> ... p=<pathN>
Decryption: ~/Cryptography/build/libs> java -jar Cryptography.jar -c=decrypt p=<path1> p=<path2> ... p=<pathN>
Both cipher modes: ~/Cryptography/build/libs> java -jar Cryptography.jar p=<path1> p=<path2> ... p=<pathN>

Notice: option “-p” can be unset. If you miss it, the application will choose files by default which were put into resources directory.

License

This code is under the Apache Licence v2.

See the NOTICE file for required notices and attributions.