opampsteg
Opampsteg is a niche concept in steganography that refers to techniques for hiding information within the behavior of operational amplifier (op-amp) circuits. Unlike digital steganography, which conceals data in file formats or protocols, opampsteg exploits subtle variations in analog signals produced by circuits that use op-amps, such as audio or sensor signals. The carrier signal is kept within normal operating parameters so that the hidden data remains unnoticed by standard monitoring.
In broad terms, opampsteg encodes bits by modulating aspects of the op-amp’s response without visibly altering
Detection and extraction typically require synchronization between sender and receiver. A demodulator may use envelope detection,
Opampsteg is not widely standardized or extensively documented in peer-reviewed literature; references are mostly experimental, theoretical,