Earlier quoted context omitted.
I worked at IBM in the '90s and again in the early 2000s. (Yeah, I'm not bright.) I worked on three major projects (i.e. things that had newspaper articles at the time and Wikipedia entries today) and relatively minor one (cough, cough, AACS). None of the projects shipped. One had hard technical problems, but those paled in comparison to the management problems. In the final case, the entire division disappeared in t…
Honest question, why do you feel you are unable to talk freely about what you worked on? It seems odd to me that 10/15 years later one would not talk openly about past projects. Certainly any NDA's have long since expired?
In roughly 2005, shortly after I finished my Ph.D. and while I was busy not finding a research job, I went to work at IBM as a contractor. The project I was working on, xCP, was a peer-to-peer distributed system for securely sharing digital media, i.e. between various devices in a user's home or car. It used a technique called broadcast encryption, much of which IP is owned by IBM (Jeff Lotspiech worked for IBM[1]).
I wrote the C version of the prototype distributed system including translating (and fixing) the (horribly, horribly broken) Java reference implementation of the broadcast encryption library.
Shortly afterwards, the project was cancelled and IBM's Pervasive Computing division (not Pervasive Computing the company) disappeared like a puff of smoke.
Then I remembered why I didn't want to work for IBM again.
[1] https://en.wikipedia.org/wiki/Advanced_Access_Content_System