encryption-decryption

Encryption Decryption (Java) Project from https://hyperskill.org.

This is a little encryption/decryption program.

Parameters:

• data (optional) [string] - message to be processed by the program. When data and in aren't defined, promps the user to enter data and key parameters.
• key [integer] - gives the key to be used by the encryption algorithm. Required when in parameter it's defined.
• alg (optional) [string] - defines the algorithm used by the program. When not defined, prompts user. Possible values:
  • shift - shifts each letter by the specified number (key) according to its order in the alphabet. If you reach the end of the alphabet, start back at the beginning (a follows z). Only lowercase
  • unicode - shifts every character from the given string data number of key positions on unicode table.
• mode (optional) [string] - defines program mode. When not defined, prompts user. Possible values:
  • enc - encrypts data
  • dec - decrypts data
• in (optional) [string] - path to a file containing text to be procced by the program
• out (optional) [string] - path to a file to print the result of the program. If not defined the result its printed to the console.

Example

java Main -key 10 -mode enc -in road_to_treasure.txt -alg unicode -out protected.txt