Ron Paul, a former republican member of Congress and prominent libertarian, thanked Snowden and Greenwald and denounced the mass surveillance as unuseful and damaging, urging instead more transparency in the US government actions.[ He called Congress "derelict in giving that much power to the government," and said that had he been elected president, he would have ordered searches only when there was probable cause of a crime having been committed, which he said was not how the PRISM program was being operated.

In a blog post, David Simon, the creator of The Wire, compared the NSA's programs, including PRISM, to a 1980s effort by the City of Baltimore to add dialed number recorders to all pay phones to know which individuals were being called by the callers; the city believed that drug traffickers were using pay phones and pagers, and a municipal judge allowed the city to place the recorders. The placement of the dialers formed the basis of the show's first season. Simon argued that the media attention regarding the NSA programs is a "faux scandal." Political critic Noam Chomsky argued, "Governments should not have this capacity. But governments will use whatever technology is available to them to combat their primary enemy – which is their own population" In regards to PRISM and other NSA surveillance programs, Steve Wozniak, a co-founder of Apple Computers, said to FayerWayer, a Spanish technology website, "All these things about the constitution, that made us so good as people – they are kind of nothing." Valerie Plame Wilson and Joseph C. "Joe" Wilson said that "Prism and other NSA data-mining programs might indeed be very effective in hunting and capturing actual terrorists, but we don't have enough information as a society to make that decision."

The Electronic Frontier Foundation (EFF), an international non-profit digital-rights group based in the U.S., is hosting a tool, by which an American resident can write to their government representatives regarding their opposition to mass spying.

According to an interview released by Snowden in a Q&A on The Guardian, using Strong encryption for communication is an effective countermeasure for citizens to protect themselves from the PRISM snooping, but notes that endpoint security is still a weak point.

Response from companies

The original Washington Post and Guardian articles reporting on PRISM noted that one of the leaked briefing documents said PRISM involves collection of data "directly from the servers" of several major internet services providers.

Corporate executives of several companies identified in the leaked documents told The Guardian that they had no knowledge of the PRISM program in particular and also denied making information available to the government on the scale alleged by news reports. Statements of several of the companies named in the leaked documents were reported by TechCrunch and The Washington Post as follows:

Microsoft: "We provide customer data only when we receive a legally binding order or subpoena to do so, and never on a voluntary basis. In addition we only ever comply with orders for requests about specific accounts or identifiers. If the government has a broader voluntary national security program to gather customer data we don't participate in it."

Yahoo!: "Yahoo! takes users' privacy very seriously. We do not provide the government with direct access to our servers, systems, or network." "Of the hundreds of millions of users we serve, an infinitesimal percentage will ever be the subject of a government data collection directive."

Facebook: "We do not provide any government organization with direct access to Facebook servers. When Facebook is asked for data or information about specific individuals, we carefully scrutinize any such request for compliance with all applicable laws, and provide information only to the extent required by law."

Google: "Google cares deeply about the security of our users' data. We disclose user data to government in accordance with the law, and we review all such requests carefully. From time to time, people allege that we have created a government ‘back door' into our systems, but Google does not have a backdoor for the government to access private user data." "Any suggestion that Google is disclosing information about our users' Internet activity on such a scale is completely false."

Apple: "We have never heard of PRISM. We do not provide any government agency with direct access to our servers, and any government agency requesting customer data must get a court order."

Dropbox: "We've seen reports that Dropbox might be asked to participate in a government program called PRISM. We are not part of any such program and remain committed to protecting our users' privacy."

In response to the technology companies' denials of the NSA being able to directly access the companies' servers, The New York Times reported that sources had stated the NSA was gathering the surveillance data from the companies using other technical means in response to court orders for specific sets of data. The Washington Post suggested, "It is possible that the conflict between the PRISM slides and the company spokesmen is the result of imprecision on the part of the NSA author. In another classified report obtained by The Post, the arrangement is described as allowing 'collection managers [to send] content tasking instructions directly to equipment installed at company-controlled locations,' rather than directly to company servers." "[I]n context, 'direct' is more likely to mean that the NSA is receiving data sent to them deliberately by the tech companies, as opposed to intercepting communications as they're transmitted to some other destination.

"If these companies received an order under the FISA amendments act, they are forbidden by law from disclosing having received the order and disclosing any information about the order at all," Mark Rumold, staff attorney at the Electronic Frontier Foundation, told ABC News.

On May 28, 2013, Google was ordered by United States District Court Judge Susan Illston to comply with a National Security Letter issued by the FBI to provide user data without a warrant. Kurt Opsahl, a senior staff attorney at the Electronic Frontier Foundation, in an interview with VentureBeat said, "I certainly appreciate that Google put out a transparency report, but it appears that the transparency didn't include this. I wouldn't be surprised if they were subject to a gag order."

The New York Times reported on June 7, 2013, that "Twitter declined to make it easier for the government. But other companies were more compliant, according to people briefed on the negotiations." The other companies held discussions with national security personnel on how to make data available more efficiently and securely. In some cases, these companies made modifications to their systems in support of the intelligence collection effort. The dialogues have continued in recent months, as General Martin Dempsey, the chairman of the Joint Chiefs of Staff, has met with executives including those at Facebook, Microsoft, Google and Intel. These details on the discussions provide insight into the disparity between initial descriptions of the government program including a training slide which states, "Collection directly from the servers" and the companies' denials.

While providing data in response to a legitimate FISA request approved by FISC is a legal requirement, modifying systems to make it easier for the government to collect the data is not. This is why Twitter could legally decline to provide an enhanced mechanism for data transmission. Other than Twitter, the companies were effectively asked to construct a locked mailbox and provide the key to the government, people briefed on the negotiations said. Facebook, for instance, built such a system for requesting and sharing the information. Google does not provide a lockbox system, but instead transmits required data by hand delivery or secure FTP.
 

PRISM is a clandestine national security electronic surveillance program operated by the United States National Security Agency (NSA) since 2007. PRISM is a government codename for a data collection effort known officially as US-984XN. It is a SIGAD operated under the supervision of the United States Foreign Intelligence Surveillance Court pursuant to the Foreign Intelligence Surveillance Act (FISA). The existence of the program was leaked by NSA contractor Edward Snowden and published by The Guardian and The Washington Post on June 6, 2013. A document included in the leak indicated that PRISM was "the number one source of raw intelligence used for NSA analytic reports." The President's Daily Brief, an all-source intelligence product, cited PRISM data as a source in 1,477 items in 2012. The leaked information came to light one day after the revelation that the United States Foreign Intelligence Surveillance Court had been requiring the telecommunications company Verizon to turn over to the NSA logs tracking all of its customers' telephone calls on an ongoing daily basis.

U.S. government officials have disputed some aspects of the Guardian and Washington Post stories and have defended the program by asserting it cannot be used on domestic targets without a warrant, and that the program receives independent oversight from the executive, judicial, and legislative branches. According to NSA Director General Keith Alexander, communications surveillance helped prevent more than 50 potential terrorist attacks worldwide (at least 10 of them in the United States) between 2001 and 2013, and the PRISM web traffic surveillance program contributed in over 90 percent of those cases. President Barack Obama stated that "this is not a situation in which we are rifling through, you know, the ordinary emails of German citizens or American citizens or French citizens or anybody else" and that the NSA's data gathering practices constitute "a circumscribed, narrow system directed at us being able to protect our people."

History

Details of information collected via PRISM
PRISM is a "Special Source Operation" in the tradition of NSA's intelligence alliances with as many as 100 trusted U.S. companies since the 1970s. A prior program, the Terrorist Surveillance Program, was implemented in the wake of the September 11 attacks under the George W. Bush Administration but was widely criticized and challenged as illegal, because it was conducted without approval of the Foreign Intelligence Surveillance Court. PRISM was authorized by the Foreign Intelligence Surveillance Court. PRISM's creation was enabled under President Bush by the Protect America Act of 2007 and by the FISA Amendments Act of 2008, which legally immunizes private companies that cooperate with U.S. government agencies in intelligence collection, and which in 2012 was renewed by Congress under President Obama for an additional five years, through December 2017. According to The Register, the FISA Amendments Act of 2008 "specifically authorizes intelligence agencies to monitor the phone, email, and other communications of U.S. citizens for up to a week without obtaining a warrant" when one of the parties is outside the U.S.

PRISM was first publicly revealed on June 6, 2013, after classified documents about the program were leaked to The Washington Post and The Guardian by American Edward Snowden. The leaked documents included 41 PowerPoint slides, four of which were published in news articles. The documents identified several technology companies as participants in the PRISM program, including (date of joining PRISM in parentheses) Microsoft (2007), Yahoo! (2008), Google (2009), Facebook (2009), Paltalk (2009), YouTube (2010), AOL (2011), Skype (2011), and Apple (2012). The speaker's notes in the briefing document reviewed by The Washington Post indicated that "98 percent of PRISM production is based on Yahoo, Google and Microsoft."
The slide presentation stated that much of the world's electronic communications pass through the United States, because electronic communications data tend to follow the least expensive route rather than the most physically direct route, and the bulk of the world's internet infrastructure is based in the United States. The presentation noted that these facts provide United States intelligence analysts with opportunities for intercepting the communications of foreign targets as their electronic data pass into or through the United States.

According to The Washington Post, the intelligence analysts search PRISM data using terms intended to identify suspicious communications of targets whom the analysts suspect with at least 51 percent confidence to not be United States citizens, but in the process, communication data of some United States citizens are also collected unintentionally. Training materials for analysts tell them that while they should periodically report such accidental collection of non-foreign United States data, "it's nothing to worry about."

Domestic Response

The New York Times editorial board charged that the Obama administration "has now lost all credibility on this issue," and lamented that "for years, members of Congress ignored evidence that domestic intelligence-gathering had grown beyond their control, and, even now, few seem disturbed to learn that every detail about the public's calling and texting habits now reside in a N.S.A. database."
In response to Obama administration arguments that it could stop terrorism in the cases of Najibullah Zazi and David Headley, Ed Pilkington and Nicholas Watt of The Guardian said in regards to the role of PRISM and Boundless Informant interviews with parties involved in the Zazi scheme and court documents lodged in the United States and the United Kingdom indicated that "conventional" surveillance methods such as "old-fashioned tip-offs" of the British intelligence services initiated the investigation into the Zazi case. An anonymous former CIA agent said that in regards to the Headley case, "That's nonsense. It played no role at all in the Headley case. That's not the way it happened at all." Pilkington and Watt concluded that the data-mining programs "played a relatively minor role in the interception of the two plots."[72] Michael Daly of The Daily Beast stated that even though Tamerlan Tsarnaev had visited Inspire and even though Russian intelligence officials alerted U.S. intelligence officials about Tsarnaev, PRISM did not prevent him from carrying out the Boston bombings, and that the initial evidence implicating him came from his brother Dzhokhar Tsarnaev and not from federal intelligence. In addition, Daly pointed to the fact that Faisal Shahzad visited Inspire but that federal authorities did not stop his attempted terrorist plot. Daly concluded, "The problem is not just what the National Security Agency is gathering at the risk of our privacy but what it is apparently unable to monitor at the risk of our safety."