Encrypt_Decrypt

This project is about Encryption & Decryption using Command Line in java.

To use this code, go to the Ecrypt_Decrypt Directory:

To Compile the Main :

 javac Main.java

You ll see in the Ecrypt_Decrypt Directory .class of all classes.

To run this code we can pass several arguments in the command line :

• -alg : To choose the which algorithm; we've shift or unicode. if we didn't specifie by default it will use shift Algorirthm.
• -mode: To choose the mode; enc or dec. If we didn't specifie by default it will use enc mode.
• -data : To set the data to encrypt or decrypt.
• -key : To set the key to encrypt or decrypt. If we didn't specifie by default it will use 0 as a key.
• -in : To set the Input file to read data from which will be encrypt or decrypt. If we've both -in and -data we choose -data over -in.
• -out : To set the Output file to write the result. If we don't have both -out we print the result to the standard output.

As you will see in the examples the order of the parameters is not important.

• Exemples for running the Main :

java -cp . Main -alg unicode -mode enc -key 5  -in input.txt -out protected.txt 

java -cp . Main -mode ENC -data "Hello There!" -out protected.txt -key 5 

java -cp . Main -mode dec -in protected.txt -out decrypted.txt -key 5 -alg shift

java -cp . Main -mode ENC -data "Hello There!"  -key 5 -alg unicode