I’ve made a pdf of the Guardian‘s online version of one, 32-frame X-Keyscore presentation. Download here. Oddly, that 32-page presentation is not the source of some of the frames in Greenwald’s accompanying article, even some marked with the “X-Keyscore” logo come from another X-Keyscore presentation, or from different presentations altogether. The first WaPo article about the NSA leak said there were a total of 91 slides, “plus supporting documentation”. – RB
X-Keyscore: NSA tool collects ‘nearly everything a user does on the internet’
Glenn Greenwald, Guardian, Jul 31 2013
A top secret NSA program allows analysts to search with no prior authorization through vast databases containing emails, online chats and the browsing histories of millions of individuals, according to documents provided by Edward Snowden. The NSA boasts in training materials that the program, called X-Keyscore, is its “widest-reaching” system for developing intelligence from the internet. The latest revelations will add to the intense public and congressional debate around the extent of NSA surveillance programs. They come as senior intelligence officials testify to the Senate judiciary committee on Wednesday, releasing classified documents in response to the Guardian’s earlier stories on bulk collection of phone records and FISA surveillance court oversight. The files shed light on one of Snowden’s most controversial statements, made in his first video interview published by the Guardian on Jun 10. Snowden said:
I, sitting at my desk, could wiretap anyone, from you or your accountant, to a federal judge or even the president, if I had a personal email.
US officials vehemently denied this specific claim. Mike Rogers, the Republican chairman of the House intelligence committee, said of Snowden’s assertion:
He’s lying. It’s impossible for him to do what he was saying he could do.
But training materials for X-Keyscore detail how analysts can use it and other systems to mine enormous agency databases by filling in a simple on-screen form giving only a broad justification for the search. The request is not reviewed by a court or any NSA personnel before it is processed. X-Keyscore, the documents boast, is the NSA’s “widest reaching” system developing intelligence from computer networks: what the agency calls Digital Network Intelligence. One presentation claims the program covers “nearly everything a typical user does on the internet,” including the content of emails, websites visited and searches, as well as their metadata. Analysts can also use X-Keyscore and other NSA systems to obtain ongoing “real-time” interception of an individual’s internet activity. Under US law, the NSA is required to obtain an individualized FISA warrant only if the target of their surveillance is a ‘US person’, though no such warrant is required for intercepting the communications of USAians with foreign targets. But X-Keyscore provides the technological capability, if not the legal authority, to target even US persons for extensive electronic surveillance without a warrant provided that some identifying information, such as their email or IP address, is known to the analyst. One training slide illustrates the digital activity constantly being collected by X-Keyscore and the analyst’s ability to query the databases at any time.
The purpose of X-Keyscore is to allow analysts to search the metadata as well as the content of emails and other internet activity, such as browser history, even when there is no known email account (a “selector” in NSA parlance) associated with the individual being targeted. Analysts can also search by name, telephone number, IP address, keywords, the language in which the internet activity was conducted or the type of browser used. One document notes that this is because “strong selection [search by email address] itself gives us only a very limited capability” because “a large amount of time spent on the web is performing actions that are anonymous.” The NSA documents assert that by 2008, 300 terrorists had been captured using intelligence from X-Keyscore. Analysts are warned that searching the full database for content will yield too many results to sift through. Instead they are advised to use the metadata also stored in the databases to narrow down what to review. A slide entitled “plug-ins” in a Dec 2012 document describes the various fields of information that can be searched. It includes “every email address seen in a session by both username and domain,” “every phone number seen in a session (eg address book entries or signature block),” and user activity: “the webmail and chat activity to include username, buddylist, machine specific cookies etc.” In a second Guardian interview in June, Snowden elaborated on his statement about being able to read any individual’s email if he had their email address. He said the claim was based in part on the email search capabilities of X-Keyscore, which Snowden says he was authorized to use while working as a Booz Allen contractor for the NSA. One top-secret document describes how the program “searches within bodies of emails, webpages and documents,” including the “To, From, CC, BCC lines” and the ‘Contact Us’ pages on websites.” To search for emails, an analyst using X-KS enters the individual’s email address into a simple online search form, along with the “justification” for the search and the time period for which the emails are sought.
The analyst then selects which of those returned emails they want to read by opening them in NSA reading software. The system is similar to the way in which NSA analysts generally can intercept the communications of anyone they select, including, as one NSA document put it, “communications that transit the US and communications that terminate in the US.” One document, a top secret 2010 guide describing the training received by NSA analysts for general surveillance under the FISA Amendments Act of 2008, explains that analysts can begin surveillance on anyone by clicking a few simple pull-down menus designed to provide both legal and targeting justifications. Once options on the pull-down menus are selected, their target is marked for electronic surveillance and the analyst is able to review the content of their communications:
Beyond emails, the X-Keyscore system allows analysts to monitor a virtually unlimited array of other internet activities, including those within social media. An NSA tool called DNI Presenter, used to read the content of stored emails, also enables an analyst using XKeyscore to read the content of Facebook chats or private messages.
An analyst can monitor such Facebook chats by entering the Facebook user name and a date range into a simple search screen.
Analysts can search for internet browsing activities using a wide range of information, including search terms entered by the user or the websites viewed.
As one slide indicates, the ability to search HTTP activity by keyword permits the analyst access to what the NSA calls “nearly everything a typical user does on the internet.”
The X-Keyscore program also allows an analyst to learn the IP addresses of every person who visits any website the analyst specifies.
The quantity of communications accessible through programs such as X-Keyscore is staggeringly large. One NSA report from 2007 estimated that there were 850b “call events” collected and stored in the NSA databases, and close to 150b internet records. Each day, the document says, 1b to 2b records were added. William Binney, a former NSA mathematician, said last year that the agency had “assembled on the order of 20 trillion transactions about US citizens with other US citizens,” an estimate, he said, that “only was involving phone calls and emails”. A 2010 WaPo article reported:
Every day, collection systems at the NSA intercept and store 1.7b emails, phone calls and other types of communications.
The X-Keyscore system is continuously collecting so much internet data that it can be stored only for short periods of time. Content remains on the system for only three to five days, while metadata is stored for 30 days. One document explains:
At some sites, the amount of data we receive per day (20+ terabytes) can only be stored for as little as 24 hours.
To solve this problem, the NSA has created a multi-tiered system that allows analysts to store “interesting” content in other databases, such as one named Pinwale which can store material for up to five years. It is the databases of X-Keyscore, one document shows, that now contain the greatest amount of communications data collected by the NSA.
In 2012, there were at least 41b total records collected and stored in X-Keyscore for a single 30-day period.
While the FISA Amendments Act of 2008 requires an individualized warrant for the targeting of US persons, NSA analysts are permitted to intercept the communications of such individuals without a warrant if they are in contact with one of the NSA’s foreign targets. The ACLU’s deputy legal director, Jameel Jaffer, told the Guardian last month that national security officials expressly said that a primary purpose of the new law was to enable them to collect large amounts of USAians’ communications without individualized warrants. Jaffer said:
The government doesn’t need to ‘target’ USAians in order to collect huge volumes of their communications. The government inevitably sweeps up the communications of many USAians when targeting foreign nationals for surveillance.
An example is provided by one X-Keyscore document showing an NSA target in Tehran communicating with people in Frankfurt, Amsterdam and New York.
In recent years, the NSA has attempted to segregate exclusively domestic US communications in separate databases. But even NSA documents acknowledge that such efforts are imperfect, as even purely domestic communications can travel on foreign systems, and NSA tools are sometimes unable to identify the national origins of communications. Moreover, all communications between USAians and someone on foreign soil are included in the same databases as foreign-to-foreign communications, making them readily searchable without warrants. Some searches conducted by NSA analysts are periodically reviewed by their supervisors within the NSA. Snowden told the Guardian in June:
It’s very rare to be questioned on our searches, and even when we are, it’s usually along the lines of: ‘let’s bulk up the justification.’
In a letter this week to senator Ron Wyden, DNI Clapper acknowledged that NSA analysts have exceeded even legal limits as interpreted by the NSA in domestic surveillance. Acknowledging what he called “a number of compliance problems,” Clapper attributed them to “human error” or “highly sophisticated technology issues” rather than “bad faith.” However, Wyden said on the Senate floor on Tuesday:
These violations are more serious than those stated by the intelligence community, and are troubling.
In a statement to the Guardian, the NSA said:
NSA’s activities are focused and specifically deployed against and only against legitimate foreign intelligence targets in response to requirements that our leaders need for information necessary to protect our nation and its interests. X-Keyscore is used as a part of NSA’s lawful foreign signals intelligence collection system. Allegations of widespread, unchecked analyst access to NSA collection data are simply not true. Access to X-Keyscore, as well as all of NSA’s analytic tools, is limited to only those personnel who require access for their assigned tasks. In addition, there are multiple technical, manual and supervisory checks and balances within the system to prevent deliberate misuse from occurring. Every search by an NSA analyst is fully auditable, to ensure that they are proper and within the law. These types of programs allow us to collect the information that enables us to perform our missions successfully: to defend the nation and to protect US and allied troops abroad.