Index_P

O

Object-based classification, 96

Old typewriter effect, 46

One-time pads, 8

Onion juice, 22

On the Defense of Fortified Places, 17–18

Open codes, 43–45

Opener (cryptolope), 173

Open MG copyright protection technology, 173–174

Open-space method, 56

Orthogonal projection, 89–90

Outguess 01.3b, 187

OutGuessNICETEXT (steganography software), 124

Ownership, proof of, 85–86