CPC Class Codes
G06Q 20/341
Active cards, i.e. cards in...
G06Q 20/40145
Biometric identity checks
G06T 1/005
Robust watermarking, e.g. a...
G06T 1/0057
Compression invariant water...
G06T 2201/0052
Embedding of the watermark ...
G06T 2201/0065
Extraction of an embedded w...
G06T 2201/0081
whereby both original and w...
G07C 9/253
visually
G07D 7/0032
using holograms
G07D 7/004
using digital security elem...
G07F 17/16
for devices exhibiting adve...
G07F 17/26
for printing, stamping, fra...
G07F 7/08
by coded identity card or c...
G07F 7/086
by passive credit-cards ada...
G07F 7/1008
Active credit-cards provide...
G07F 7/1016
Devices or methods for secu...
G07F 7/12
Card verification
G10L 19/018
Audio watermarking, i.e. em...
G11B 20/00086
Circuits for prevention of ...
G11B 20/00094
involving measures which re...
G11B 20/00115 :
wherein the record carrier ...
G11B 20/00166 :
involving measures which re...
G11B 20/00181 :
using a content identifier,...
G11B 20/0021 :
involving encryption or dec...
G11B 20/00884 :
involving a watermark, i.e....
G11B 20/00891 :
embedded in audio data
H04B 1/665 :
using psychoacoustic proper...
H04N 1/00005 :
relating to image data
H04N 1/00037 :
Detecting, i.e. determining...
H04N 1/00079 :
remotely
H04N 1/00838 :
Preventing unauthorised rep...
H04N 1/00846 :
based on detection of a ded...
H04N 1/32144 :
embedded in the image data,...
H04N 1/32149 :
Methods relating to embeddi...
H04N 1/32208 :
involving changing the magn...
H04N 1/32251 :
in multilevel data, e.g. gr...
H04N 1/32288 :
Multiple embedding, e.g. co...
H04N 2005/91321 :
the copy protection signal ...
H04N 2005/91335 :
the copy protection signal ...
H04N 2201/3205 :
of identification informati...
H04N 2201/3207 :
of an address
H04N 2201/3226 :
of identification informati...
H04N 2201/3233 :
of authentication informati...
H04N 2201/327 :
which are undetectable to t...
H04N 2201/3271 :
Printing or stamping
H04N 2201/328 :
Processing of the additiona...
H04N 5/913 :
for scrambling ; for copy p...
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