Nikon Image Authentication System: Compromised
This is a bit off topic, I suppose, but interesting nonetheless. See this post in which Nikon's Image Authentication security suite has been cracked. As an aside, it is interesting to note that Nikon stores the Image Authentication digital signatures in their XIF MakerNote tag 0×0097 (Color Balance). That would explain why non-Nikon software is unable to read color balance info. The article also notes that Canon's image authentication scheme is flawed and was so-reported a year and a half ago.