Android AES encryption/decryption of images

Question

I need to find a way to encrypt/decrypt an images in Android.I'm new in Android programming and never been encrypt/decrypt on any other platform,so please provide me a good example,because I need to learn how to do it.I'm working on a project which needs to encrypt/decrypt images.I'll be really happy if you can help me about this. Thanks anyway!

Solution

You can take a look at this Stackoverflow Encryption Accepted Answer

Keep in mind that this is probably going to take a lot of time to encrypt/decrypt images. You also have not set any security standards (how secure must this be) so it's hard to give an authoritative answer

Update

After your comment here are a few more things to think about. Typically faster = less secure. Are you really trying to secure the images or just make them unavailable to unauthorized users.

For instance do you only want the images to be viewable on an authorized device or are you worried about them falling into the wrong hands?

I had a problem where the images should only be shown on a device that was an authorized account, that was fairly easy to solve, a unique ID associated with the users account was used to encrypt the data, so each user had their own (unique) key on the device and on the server, encryption was done on the fly on the server side. I also only needed to encrypt part of the data (header - first 4096 bytes) to make it unusable, I wasn't trying to keep the NSA from decrypting the images, just keep them from being easily decrypted and passed around.

So that was fast and secure enough, this is why I am suggesting you figure out what you are trying to do and protect against before picking a implementation plan.