Former NSA contractor Edward Snowden said on Tuesday that the WikiLeaks dump of what it claims to be more than 8,700 documents from the CIA's Center for Cyber Intelligence "looks authentic" and "is genuinely a big deal."

WikiLeaks announced that its "Vault7" publication shines a light on the CIA's secret hacking program with targets around the world, using malware that can bypass encryption protection in a wide range of devices, including Apple's iPhone, Google's Android and Microsoft's Windows and even Samsung TVs, which are turned into covert microphones.

Since the document dump, WikiLeaks account has shared several pieces of information via its official Twitter account, including this one: "WikiLeaks #Vault7 confirms CIA can effectively bypass Signal + Telegram + WhatsApp + Confide encryption."

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Snowden replied to this tweet with a "PSA," saying that it "incorrectly implies CIA hacked these apps / encryption."

Instead, Snowden says the Vault7 documents show that iOS and Android smartphones got hacked, which he said is a "much bigger problem."

PSA: This incorrectly implies CIA hacked these apps / encryption. But the docs show iOS/Android are what got hacked - a much bigger problem. https://t.co/Bw9AkBpOdt — Edward Snowden (@Snowden) March 7, 2017



In a separate tweet, Snowden said he is still parsing through the documents, many of which include long strings of code. But from what he's seen so far, Snowden said that what WikiLeaks "has here is genuinely a big deal. Looks authentic."

Still working through the publication, but what @Wikileaks has here is genuinely a big deal. Looks authentic. — Edward Snowden (@Snowden) March 7, 2017



Snowden explained that program and office names in the documents "are real," and could only be known by a "cleared insider."

What makes this look real?

Program & office names, such as the JQJ (IOC) crypt series, are real. Only a cleared insider could know them. — Edward Snowden (@Snowden) March 7, 2017

If you're writing about the CIA/@Wikileaks story, here's the big deal: first public evidence USG secretly paying to keep US software unsafe. pic.twitter.com/kYi0NC2mOp — Edward Snowden (@Snowden) March 7, 2017

The CIA reports show the USG developing vulnerabilities in US products, then intentionally keeping the holes open. Reckless beyond words. — Edward Snowden (@Snowden) March 7, 2017



Snowden has been granted asylum in Russia since 2013 after he leaked secret information from the National Security Agency's surveillance programs. As recently as January, Russia said it would extend Snowden's asylum to 2020.