Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2003-03-17
2009-06-30
Vu, Kimyen (Department: 2431)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S188000, C713S168000, C380S054000, C380S200000, C380S203000, C380S277000, C380S278000, C382S100000, C382S115000, C382S118000, C382S124000
Reexamination Certificate
active
07555650
ABSTRACT:
The computational cost of embedding information in a digital representation is reduced by making a set of at least two copies of the digital representation and altering subdivisions of the copies so that corresponding subdivisions in the copies are distinguishable from each other. The subdivisions may be arbitrary or may be functional subdivisions of the digital representation. The subdivisions may be distinguishable by features such as watermarks that do not affect the way in which the digital representation is normally used. The marked copy in which the information is embedded is then made by selecting a given subdivision in the marked copy from one of the set of copies. Selection may be done using a selection string that has an element for each subdivision. The value of the element indicates which of the set of digital representations the subdivision corresponding to the element is to be selected from. The result of this procedure is a sequence of distinguishable subdivisions in the marked copy, and the sequence carries the embedded information. Each marked copy may have a unique sequence, in which case the sequence functions as a fingerprint for the copy. The sequence may also encode information. Examples are an identification of the recipient of the copy, information about the transaction that resulted in the copy being made, or encoded information about the content of the marked copy.
REFERENCES:
patent: 5822432 (1998-10-01), Moskowitz et al.
patent: 6064764 (2000-05-01), Bhaskaran et al.
patent: 6373960 (2002-04-01), Conover et al.
patent: 6590995 (2003-07-01), Schwenk et al.
patent: 6792130 (2004-09-01), Jones et al.
patent: 7036024 (2006-04-01), Watson
patent: 7058809 (2006-06-01), White et al.
patent: 2002/0012445 (2002-01-01), Perry
patent: 2002/0016922 (2002-02-01), Richards et al.
patent: 2002/0099947 (2002-07-01), Evans
patent: 2003/0009669 (2003-01-01), White et al.
patent: 2003/0084306 (2003-05-01), Abburi et al.
patent: 2003/0202679 (2003-10-01), Rodriguez
patent: 2004/0008864 (2004-01-01), Watson et al.
patent: 2005/0025463 (2005-02-01), Bloom et al.
patent: 2005/0129270 (2005-06-01), Prakash
patent: 2007/0258583 (2007-11-01), Wajs
patent: WO 00/56059 (2000-09-01), None
patent: WO 0056059 (2000-09-01), None
Dan Boneh and James Shaw, “Collusion-Secure Fingerprinting for Digital Data”, Sep. 1998, IEEE Transactions On Information Theory, vol. 44, No. 5.
Thorwirth Niels
Zhao Jian
Ferguson Catherine A.
Opalach Joseph J.
Shedd Robert D.
Sherkat Arezoo
Thomson Licensing
LandOfFree
Techniques for reducing the computational cost of embedding... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Techniques for reducing the computational cost of embedding..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Techniques for reducing the computational cost of embedding... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4063440