Java encryption alternitive to hardcoded key

Question

I am new to encryption.

I have looked at the javax.crypto documentation and got encryption of a file to work using this code ...

File saveFile = new File         


        

Answer 1

If your program can encrypt / decrypt a file on its own, then everything you need to perform the decryption is already built into the program, so a determined troublemaker could decrypt files you encrypted.

If possible, ask the user for a 'password,' and use what they give you as the encryption / decryption key.