Java AES Encryption with salt

java encryption aes salt
cody picture cody · Sep 5, 2011 · Viewed 32.4k times · Source

Alright, turns out I suck at Encryption/Decryption. I just dont get it. How can I make Java encrypt String message1 = "hello world"; with String salt = "mySalt"; using AES encryption? also how can I decrypt it once encrypted?

If you have the time to provide the most basic code, it would help me a lot.

Also 1 general question about AES encryption, using the same salt, will the same message always have the same encryption?

Thanks in advance.

Answer

Oliver Charlesworth picture Oliver Charlesworth · Sep 5, 2011

AES doesn't have a concept of a salt. It just takes data, and a key. For the same input, it will always generate the same output.

How you combine your message with your salt is up to you. String concatenation is probably sufficient. But note that salts don't really make a lot of sense for something like AES, because it's not a hash algorithm.

Related questions

Java 256-bit AES Password-Based Encryption

I need to implement 256 bit AES encryption, but all the examples I have found online use a "KeyGenerator" to generate a 256 bit key, but I would like to use my own passkey. How can I create my own key? I …

Read More
Initial bytes incorrect after Java AES/CBC decryption

What's wrong with the following example? The problem is that the first part of the decrypted string is nonsense. However, the rest is fine, I get... Result: `£eB6O�geS��i are you? Have a nice day. @Test public void …

Read More
Android encryption / decryption using AES

Is there a good example of how to encrypt and decrypt image and other files with AES on Android?

Read More