  Authenticity of access in very information are very important in the current
era of Internet-based technology, there are many ways to secure information
from irresponsible parties with various security attacks, some of technique can
use for defend attack from irresponsible parties are using steganography,
cryptography or also use digital signatures. Digital signatures could be one of
solution where the authenticity of the message will be verified to prove that
the received message is the original message without any change,
Ong-Schnorr-Shamir is the algorithm are used in this research and the
experiment are perform on the digital signature scheme and the hidden channel
scheme.
