Improved Optical Document Security Techniques Based on Volume Holography and Lippmann Photography

Author(s):  
Hans I. Bjelkhagen
Author(s):  
Maria Chiara Ubaldi ◽  
Pierpaolo Boffi ◽  
Davide Piccinin ◽  
Claudio Frascolla ◽  
Mario Martinelli
Keyword(s):  

2010 ◽  
Vol 30 (2) ◽  
pp. 503-507
Author(s):  
李海莲 Li Hailian ◽  
杨德兴 Yang Dexing ◽  
任小元 Ren Xiaoyuan ◽  
赵建林 Zhao Jianlin

2015 ◽  
Vol 42 (9) ◽  
pp. 0909003
Author(s):  
王崝 Wang Zheng ◽  
曹良才 Cao Liangcai ◽  
张浩 Zhang Hao ◽  
金国藩 Jin Guofan

2020 ◽  
Vol 14 (11) ◽  
pp. 2070064
Author(s):  
Shan Liu ◽  
Leszek Mateusz Mazur ◽  
Wieslaw Krolikowski ◽  
Yan Sheng

Author(s):  
Christopher H. Walker

While issues of encryption, firewalls, surveillance technologies, and cyber terrorism occupy the day-to- day thoughts of contemporary practitioners on the frontiers of information science, the essential problems they face are old, not new. The concept of document security goes back to some of the earliest eras from which writing survives. Testimony to the efforts of information professionals confronting security issues in the ancient world can be found in business, government, family, and temple contexts.


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