Invisible bits: hiding secret messages in SRAM’s analog domain

Electronic devices are increasingly the subject of inspection by authorities. While encryption hides secret messages, it does not hide the transmission of those secret messages---in fact, it calls attention to them. Thus, an adversary, seeing encrypted data, turns to coercion to extract the credentials required to reveal the secret message. Steganographic techniques hide secret messages in plain sight, providing the user with plausible deniability, removing the threat of coercion.