WikiLeaks, the website that specializes in exposing secrets, on Tuesday released what it said were thousands of documents that described internal U.S. Central Intelligence Agency discussions on hacking techniques it has used to circumvent security on electronic devices for spying.

Reuters could not immediately verify the contents of the published documents. The following are some questions and answers users of consumer electronics may have:

Q: Are the documents authentic?

A: It appears at least some are real. While the CIA has declined to comment, independent cyber security experts and former intelligence agency employees who have looked through them say that they appear to be authentic, citing code words used to describe CIA hacking programs.

Q: What did we learn about the CIA’s hacking programme?

A. WikiLeaks published documents that it says describe CIA tools for hacking into devices including mobile phones, computers and smart televisions.

Q: How can you hack a TV?

A: WikiLeaks said it identified a project known as Weeping Angel where U.S. and British intelligence agencies developed ways to take over Samsung smart TVs equipped with microphones, forcing them to record conversations when the device appeared to be turned off. Experts have long said smart TVs and other Internet-connected devices can be exploited to monitor a target.

Q: Are these revelations new?

A: While the specific details are new, it is well known in the cyber security community that intelligence agencies are constantly trying to leverage flaws in technology products to conduct espionage.

Q: The documents suggest that the CIA can access information in encrypted messaging apps like WhatsApp and Signal. I thought they were safe from even government spying?

A: No system is perfect. The documents describe ways to get information in those apps on Android devices, but only after gaining full control of those phones. Reuters has not found evidence in the documents released by WikiLeaks that the CIA had figured a way to break the encryption in those apps.

Q: Are iPhones also vulnerable?

A: The documents discuss ways to get into iPhones as well. One appeared to show a list of Apple iOS security flaws purchased by U.S. intelligence agencies so they could gain access to those devices.

Q: What should I do if I’m worried?

A: Most people do not need to worry about being targeted by intelligence agencies. But everybody should stay on top of software patches so all their computers, mobile phones and other connected devices are running software with the latest security updates. Consumers should balance security concerns with their need to use smart devices.

Q: Is this as big as the leaks from former National Security Agency contractor Edward Snowden?

A: The Snowden leaks revealed that the NSA was secretly collecting U.S. call metadata on ordinary Americans. The materials released by WikiLeaks on Tuesday did not appear to reveal the existence of unknown any unknown programs. Instead they supplied details on how U.S. intelligence agencies work to discover and exploit security flaws to conduct espionage.

Q: How did WikiLeaks get the information?

A: Unclear. Someone inside the agency may have leaked the information. Or, someone outside may have figured out a way to steal it.

(Reporting by Jim Finkle in Boston, Jonathan Weber in San Francisco and Dustin Volz in Washington; editing by Grant McCool)