Abstract
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 language | English |
|---|---|
| Patent number | US2016365973 |
| IPC | H04L 29/ 06 A I |
| Priority date | 30/10/12 |
| Publication status | Published - 15 Dec 2016 |
| Externally published | Yes |