Yesterday, there was a great lecture at The Change You Want To See Gallery in Brooklyn, NY about mobile media, dataveillance. The focus was SMS, or Short Message Service, for the uninitiated, also known as texts. You can read more about the lecture here.
Sms's are much easier to surveil than phone conversations as the messages are ready to be indexed and searched. With voice calls, it takes quite a bit of computing horsepower to decode the analog voice waves into bits that computers can understand and search, and even so, the results are fuzzy at best. As well, a former AT&T employee was present and keyed us onto the fact that all SMS's are logged and persisted along with their metadata. So who sent a message, who they sent it to, where they sent it from, where it was received, and the content as well is logged and saved, at least with AT&T and still sits today waiting for analyzation by a curious priviledged user.
Enter CryptoSMS(http://cryptosms.org/).