Thesis Archive
An ID Tamper-Proofing System Using A Digital Watermarking Algorithm (2007)
Girard Philip D. Bautista, Raymond V. Del Prado, Cornelio S. Francisco, Voltaire T. Garcia and Ryan Emmanuel D. Tani, advised by Engr. Edzel R. Lapira
Abstract:
-n this research, the group proposes a system for tamper-proofing IDs using digital watermarking. A digital watermark is embedded onto an ID using a DCT-based algorithm modified by a secret “key”. The proposed algorithm adds robustness to the watermark necessary for the problems introduced by the print-and-scan process. The IDs are then printed and then scanned using the same resolution. Suspect IDs are authenticated by attempting to extract this same watermark. Heavy damage or corruption of the extracted watermarks suggest that the ID has been tampered with. Complete absence of the watermark implies that the ID is fake or has been heavily manipulated. Unintentional attacks on the quality of the ID such as the effects of minimal creasing, fading and blurring have little effect on the quality of the extracted watermark and still indicate an authentic ID. Security of the system is increased by the secret key used in the embedding process because it is impossible to recover the correct watermark without it.
Correspondence:
Engr. Edzel R. Lapira
[email protected]