How to encrypt String in Java

Question

What I need is to encrypt string which will show up in 2D barcode(PDF-417) so when someone get an idea to scan it will get nothing readable.

Other requirements:

Answer 1

I would consider using something like https://www.bouncycastle.org/ It is a prebuilt library that allows you to encrypt whatever you like with a number of different Ciphers I understand that you only want to protect from snooping, but if you really want to protect the information, using Base64 won't actually protect you.