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Paul Merrell

The Supreme Court's Groundbreaking Privacy Victory for the Digital Age | American Civil... - 0 views

  • The Supreme Court on Friday handed down what is arguably the most consequential privacy decision of the digital age, ruling that police need a warrant before they can seize people’s sensitive location information stored by cellphone companies. The case specifically concerns the privacy of cellphone location data, but the ruling has broad implications for government access to all manner of information collected about people and stored by the purveyors of popular technologies. In its decision, the court rejects the government’s expansive argument that people lose their privacy rights merely by using those technologies. Carpenter v. U.S., which was argued by the ACLU, involves Timothy Carpenter, who was convicted in 2013 of a string of burglaries in Detroit. To tie Carpenter to the burglaries, FBI agents obtained — without seeking a warrant — months’ worth of his location information from Carpenter’s cellphone company. They got almost 13,000 data points tracking Carpenter’s whereabouts during that period, revealing where he slept, when he attended church, and much more. Indeed, as Chief Justice John Roberts wrote in Friday’s decision, “when the Government tracks the location of a cell phone it achieves near perfect surveillance, as if it had attached an ankle monitor to the phone’s user.”.
  • The ACLU argued the agents had violated Carpenter’s Fourth Amendment rights when they obtained such detailed records without a warrant based on probable cause. In a decision written by Chief Justice John Roberts, the Supreme Court agreed, recognizing that the Fourth Amendment must apply to records of such unprecedented breadth and sensitivity: Mapping a cell phone’s location over the course of 127 days provides an all-encompassing record of the holder’s whereabouts. As with GPS information, the timestamped data provides an intimate window into a person’s life, revealing not only his particular movements, but through them his ‘familial, political, professional, religious, and sexual associations.’
  • The government’s argument that it needed no warrant for these records extends far beyond cellphone location information, to any data generated by modern technologies and held by private companies rather than in our own homes or pockets. To make their case, government lawyers relied on an outdated, 1970s-era legal doctrine that says that once someone shares information with a “third party” — in Carpenter’s case, a cellphone company — that data is no longer protected by the Fourth Amendment. The Supreme Court made abundantly clear that this doctrine has its limits and cannot serve as a carte blanche for the government seizure of any data of its choosing without judicial oversight.
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  • While the decision extends in the immediate term only to historical cellphone location data, the Supreme Court’s reasoning opens the door to the protection of the many other kinds of data generated by popular technologies. Today’s decision provides a groundbreaking update to privacy rights that the digital age has rendered vulnerable to abuse by the government’s appetite for surveillance. It recognizes that “cell phones and the services they provide are ‘such a pervasive and insistent part of daily life’ that carrying one is indispensable to participation in modern society.” And it helps ensure that we don’t have to give up those rights if we want to participate in modern life. 
Paul Merrell

The Government Can No Longer Track Your Cell Phone Without a Warrant | Motherboard - 0 views

  • The government and police regularly use location data pulled off of cell phone towers to put criminals at the scenes of crimes—often without a warrant. Well, an appeals court ruled today that the practice is unconstitutional, in one of the strongest judicial defenses of technology privacy rights we've seen in a while.  The United States Court of Appeals for the Eleventh Circuit ruled that the government illegally obtained and used Quartavious Davis's cell phone location data to help convict him in a string of armed robberies in Miami and unequivocally stated that cell phone location information is protected by the Fourth Amendment. "In short, we hold that cell site location information is within the subscriber’s reasonable expectation of privacy," the court ruled in an opinion written by Judge David Sentelle. "The obtaining of that data without a warrant is a Fourth Amendment violation."
  • In Davis's case, police used his cell phone's call history against him to put him at the scene of several armed robberies. They obtained a court order—which does not require the government to show probable cause—not a warrant, to do so. From now on, that'll be illegal. The decision applies only in the Eleventh Circuit, but sets a strong precedent for future cases.
  • Indeed, the decision alone is a huge privacy win, but Sentelle's strong language supporting cell phone users' privacy rights is perhaps the most important part of the opinion. Sentelle pushed back against several of the federal government's arguments, including one that suggested that, because cell phone location data based on a caller's closest cell tower isn't precise, it should be readily collectable.  "The United States further argues that cell site location information is less protected than GPS data because it is less precise. We are not sure why this should be significant. We do not doubt that there may be a difference in precision, but that is not to say that the difference in precision has constitutional significance," Sentelle wrote. "That information obtained by an invasion of privacy may not be entirely precise does not change the calculus as to whether obtaining it was in fact an invasion of privacy." The court also cited the infamous US v. Jones Supreme Court decision that held that attaching a GPS to a suspect's car is a "search" under the Fourth Amendment. Sentelle suggested a cell phone user has an even greater expectation of location privacy with his or her cell phone use than a driver does with his or her car. A car, Sentelle wrote, isn't always with a person, while a cell phone, these days, usually is.
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  • "One’s cell phone, unlike an automobile, can accompany its owner anywhere. Thus, the exposure of the cell site location information can convert what would otherwise be a private event into a public one," he wrote. "In that sense, cell site data is more like communications data than it is like GPS information. That is, it is private in nature rather than being public data that warrants privacy protection only when its collection creates a sufficient mosaic to expose that which would otherwise be private." Finally, the government argued that, because Davis made outgoing calls, he "voluntarily" gave up his location data. Sentelle rejected that, too, citing a prior decision by a Third Circuit Court. "The Third Circuit went on to observe that 'a cell phone customer has not ‘voluntarily’ shared his location information with a cellular provider in any meaningful way.' That circuit further noted that 'it is unlikely that cell phone customers are aware that their cell phone providers collect and store historical location information,'” Sentelle wrote.
  • "Therefore, as the Third Circuit concluded, 'when a cell phone user makes a call, the only information that is voluntarily and knowingly conveyed to the phone company is the number that is dialed, and there is no indication to the user that making that call will also locate the caller,'" he continued.
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    Another victory for civil libertarians against the surveillance state. Note that this is another decision drawing guidance from the Supreme Court's decision in U.S. v. Jones, shortly before the Edward Snowden leaks came to light, that called for re-examination of the Third Party Doctrine, an older doctrine that data given to or generated by third parties is not protected by the Fourth Amendment.   
Paul Merrell

Fourth Circuit adopts mosaic theory, holds that obtaining "extended" cell-site records ... - 0 views

  • A divided Fourth Circuit has ruled, in United States v. Graham, that “the government conducts a search under the Fourth Amendment when it obtains and inspects a cell phone user’s historical [cell-site location information] for an extended period of time” and that obtaining such records requires a warrant. The new case creates multiple circuit splits, which may lead to Supreme Court review. Specifically, the decision creates a clear circuit split with the Fifth and Eleventh Circuits on whether acquiring cell-site records is a search. It also creates an additional clear circuit split with the Eleventh Circuit on whether, if cell-site records are protected, a warrant is required. Finally, it also appears to deepen an existing split between the Fifth and Third Circuits on whether the Stored Communications Act allows the government to choose whether to obtain an intermediate court order or a warrant for cell-site records. This post will cover the reasoning of the new case in detail.
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