Abstract: Methods and systems are described for secure delivery of a content item from at least a first content distribution network (CDN1) to at least one content receiving entity using a split-key cryptosystem comprising encryption and decryption algorithms E and D, a cipher algorithm for generating encryption and decryption keys e,d on the basis of secret information S and a split-key algorithm using secret information S 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, such that Ddk(Ddk-1( . . . (Dd2(Dd1(Eei(Eei-1( . . . (Ee2(Ee1(X)) . . . ))=Ddk(Ddk-1( . . . (Dd2(Dd1(Xe1, e2, . . . , ei))=X wherein i,k?1 and i+k>2.
Type:
Grant
Filed:
September 7, 2012
Date of Patent:
May 24, 2016
Assignees:
Koninklijke KPN N.V., Nederlandse Organisate voor Toegepast-Natuurwetenschappelijk Onderzoe TNO
Inventors:
Peter Veugen, Mattijs Oskar Van Deventer, Omar Aziz Niamut