American Civil Liberties Union

In an effort to rein in overreaching law enforcement practices, Rep. Jason Chaffetz (R-Utah) and Sen. Ron Wyden (D-Ore.) yesterday re-introduced the GPS Act, which would require a warrant for location tracking and create a critical check on the growing use of these invasive searches.

For the past year, the ACLU has been gathering information on local law enforcement agencies’ use of cell phone location tracking. (We’ve written about what we’ve learned here, here, here, here, and here.) In addition to everything we’ve discovered about location tracking itself, we’ve also learned about a number of other techniques law enforcement and the telcos can use when they work together. Sometimes the information came to light because, as with this telecom data retention chart, the information on the other techniques was mingled with the information on cell phone location tracking. Sometimes it was because law enforcement agencies misunderstood our public records requests and sent us everything they had related to telephones.

A federal magistrate judge in New York recently ruled that cell phone location data deserves no protection under the Fourth Amendment and that accordingly, the government can engage in real-time location surveillance without a search warrant. In an opinion straight from the Twilight Zone, magistrate judge Gary Brown ruled two weeks ago that “cell phone users who fail to turn off their cell phones do not exhibit an expectation of privacy.”

The case in question involved a physician who the DEA believed had issued thousands of prescriptions for pain killers in exchange for cash. In March of this year, the DEA had obtained a warrant for his arrest, and,

Internet-based text message apps are one of the most common means of communicating today. But when it comes to this relatively new technology, surveillance law is behind the times in important ways, and as is so often the case when the law lags technology, our privacy suffers as a result.

Text messages have for some time been a cash cow for the wireless carriers—back in 2007, annual global SMS revenue was estimated to be 60 billion dollars. Charging consumers 25 cents per 140 character text message is a great way to make money, but when those same consumers are already paying for internet connectivity to their smartphones, the market was ripe for disruption. In recent years, a number of internet companies have entered the text message market. In some cases, they have offered low-cost or free SMS services that interoperate with the carriers’ existing SMS system. In other cases, large companies like Facebook, Apple and WhatsApp have offered closed text message services to their smartphone using customers. Often seeking to reduce their monthly telephone bills, millions of consumers have migrated from smartphone text message services provided by the wireless carriers to smartphone text message services provided by internet companies.