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Packet-filter firewall, 75
Paintbrush (PCX) files, 145
Patchwork, 53, 89–90, 191
Payload, 75
PC FileSafeNICETEXT (steganography software), 124–125
PCM (pulse code modulation), 51
PCX files, 145
PDF files, 145
Pedophilia, 200
Perceptual masking, 53, 55
Perfect fingerprinting, 96
Persia, 16–17
Personal ads, 33
Phase coding, 55
Philippines, University of the, 182
PH indicators, 12
PhotoCheck (watermarking software), 149
Phototile (steganography software), 125
Physical fingerprinting, 96
Picture, 40
Picture Messenger (steganography software), 126
Pigeons, 24–25
Pixels, 89
PKI (public key infrastructure), 169
.Png files, 112
Poems, 10
Point Lock PRO (steganography software), 126
Pornography, 199
Porta, Giovanni, 20
Prayers, 19
PRETTY GOOD ENVELOPE (steganography software), 126
Prisoners, 33
Prisoner's Problem, 6–7, 38
PrivateInfo (steganography software), 126–127
Proof of ownership, 85–86
Protector (steganography software), 127
Provos, Niels, 179–180
Public key infrastructure (PKI), 169
Pueblo (ship), 33
Pulse code modulation (PCM), 51
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