JPEG2000 Security Standard, JPSEC
At her blog, HP’s Susie Wee gives some insight on newly approved Part-8 of Jpeg2000 standard which deals with, among other things, intelligent encryption of Jpeg 2000 files.
Susie has been working on media security for scalable media for some years now, and is a co-editor of the JPSEC standard.
In short, the multitude of progressive/scalability options that JPEG 2000 provides (which are the formats real strength) will disappear on encrypting the entire compressed streams as a whole. The solution lies in providing a format aware standard which can look through Jpeg2000’s tiles/layers/packets/etc to encrypt just those parts so that a server can still process all different progressive requests without having to go through the entire encode/decode cycle. The standard also specifies the signaling data that must be included in the protected bitstream to allow the protected subsets of data to be extracted.
In Susie’s words, “simultaneously allowing mid-network transcoding and end-to-end security”.