posted 19 years ago
Anything that is sent across the wire is, ultimately, a byte stream. Whether the original object was an image, a text file or sound clip is irrelevent.
The process you'll need to follow is:
1) convert image to a byte stream
This can be done in a variety of ways, from getting the image (in memory) bytes and using those, to reading the raw bytes from the storage medium.
2) encrypt bytes
This is a very well documented process with hundreds of tutorials all over the web on how to take a byte stream, an by using a cryptographic engine construct a stream of bytes that are, encrypted. Whether you use symmetric key cryptography or asymmetric public/private) key cryptography is up to you.
3) send bytes to the receiver
4) receiver reverses process
Its important to realise that this is analogous to using a comms stack and in fact, sits atop the standard layers because each distinct layer is essentially talking/communicating with its peer layer in the remote end, regardless that its actually sending data to its layers above and below it to facilitate the communications.
