公开(公告)号：DE60325105D1

公开(公告)日：2009-01-15

申请号：DE60325105

申请日：2003-09-19

Applicant: IBM

Inventor： AMINI LISA D ,  FROSSARD PASCAL ,  VENKATRAMANI CHITRA ,  VERSCHEURE OLIVIER ,  WESTERINK PETER

IPC: H04L29/06

Abstract: Techniques for securely and adaptively delivering multimedia content are disclosed in which a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each access unit from the set of alternate access units of the previous time slot are obtained. An encryption stream index is then assigned to each access unit in the set of alternate access units in the current time slot, such that the encryption index increases over time. Thus, the invention overcomes the problem of encrypting a multimedia stream that may have multiple access units for each time slot by selecting the encryption index for each access unit such that the encryption index increases, regardless of which access unit the delivery system (e.g., server) selects for transmission.

公开(公告)号：AT416553T

公开(公告)日：2008-12-15

申请号：AT03756843

申请日：2003-09-19

Applicant: IBM

Inventor： AMINI LISA ,  FROSSARD PASCAL ,  VENKATRAMANI CHITRA ,  VERSCHEURE OLIVIER ,  WESTERINK PETER

IPC: H04L29/06

Abstract: Techniques for securely and adaptively delivering multimedia content are disclosed in which a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each access unit from the set of alternate access units of the previous time slot are obtained. An encryption stream index is then assigned to each access unit in the set of alternate access units in the current time slot, such that the encryption index increases over time. Thus, the invention overcomes the problem of encrypting a multimedia stream that may have multiple access units for each time slot by selecting the encryption index for each access unit such that the encryption index increases, regardless of which access unit the delivery system (e.g., server) selects for transmission.

公开(公告)号：AU2003304065A1

公开(公告)日：2004-11-23

申请号：AU2003304065

申请日：2003-09-19

Applicant: IBM

Inventor： AMINI LISA D ,  FROSSARD PASCAL ,  VENKATRAMANI CHITRA ,  VERSCHEURE OLIVIER ,  WESTERINK PETER

IPC: H04L29/06

Abstract: Techniques for securely and adaptively delivering multimedia content are disclosed in which a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each access unit from the set of alternate access units of the previous time slot are obtained. An encryption stream index is then assigned to each access unit in the set of alternate access units in the current time slot, such that the encryption index increases over time. Thus, the invention overcomes the problem of encrypting a multimedia stream that may have multiple access units for each time slot by selecting the encryption index for each access unit such that the encryption index increases, regardless of which access unit the delivery system (e.g., server) selects for transmission.