Professor Richelson's recent work "How to Subvert Backdoored Encryption" has been featured on Bruce Schneier's blog and Cory Doctorow's Blog, and spent some time on the front page of Hacker News. The paper describes a protocol for secure communication in an Orwellian world where citizens' only legal method of communication is via a backdoored encryption scheme where all secret keys are known to the central government.