1. How does it get sent to a black hat, the user was shown the recipient.
2. The whitespace steganography falls under a sanitization problem, but I concede that "hiding" messages can be a problem. Can't imagine the bandwidth being large at all, let alone encode your contacts and inbox.
2. The whitespace steganography falls under a sanitization problem, but I concede that "hiding" messages can be a problem. Can't imagine the bandwidth being large at all, let alone encode your contacts and inbox.