Secure Distribution of Watermarked Content

Mattijs Oskar van Deventer (Inventor), Peter Joannes Mathias Veugen (Inventor)

Research output: Patent

14 Downloads (Pure)


Methods and systems are described for enabling secure delivery and watermarking of at least part of a content item X using a split-key cryptosystem comprising encryption and decryption algorithms E and D, a key generating algorithm for generating encryption and decryption keys e, d, a split-key algorithm for splitting e into i different split-encryption keys e1, e2, . . . , ei and/or for splitting d into k different split-decryption keys d1, d2, . . . , dk respectively wherein i, k≧1 and i+k>2; wherein executing i consecutive encryption operations and k consecutive decryption operations on content item X using said split-encryption and split-decryption keys respectively, generates a fully decrypted content item X (Ddk(Ddk-1( . . . (Dd2(Dd1(Eei(Eei-1( . . . (Ee2(Ee1(X)) . . . ))=X).

Original languageEnglish
Patent numberUS2016365973
IPCH04L 29/ 06 A I
Priority date30/10/12
Publication statusPublished - 15 Dec 2016
Externally publishedYes


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