Secure Processing Offload in Recombining Media Segments for Mobile Access

We develop an architecture for a federation of home gateways. We distinguish inner and outer circle friends and describe a mechanism for social-aware backup of content and sharing with friends. To facilitate remote access, content can be segmented and redundantly stored at gateways of friends. We develop innovative solutions that allow secure and redundant storage of segments with inner and outer circle friends. They enable decoding of segments in the encrypted domain without the need of sharing a decryption key with friends, which relieves the computational effort of mobile devices accessing the content. We combine Vandermonde-Reed-Solomon codes with homomorphic encryption to three different solutions and describe their differences in complexity.