Wow I didn't realize that Signal is run on Amazon's servers and that they contract with the CIA. This article has some interesting points to mitigate the privacy concerns of this real popular service: https://simplifiedprivacy.com/signal-messenger-guide-to-avoid-privacy-mistakes/
Signal takes steps to reduce the amount of metadata visible, like sealed sender which makes it so that Signal doesn't know who sent a message. Even your payment information for donations is separated from your identity so that they know you are a donor, but not how you donated.
It desn't matter if Signal were hosted on Putin's personal servers. Its security is in its protocol, it's not trust based.
Thanks for the reply but please check the article:
Sealed Sender is Flawed
Signal has a flawed system called “Sealed Sender”, which encrypts the metadata of who sent the message inside the encrypted packets. However, cybersecurity researchers from the University of Colorado Boulder, Boston University, George Washington University, and U.S. Naval Academy, found that Sealed Sender could be compromised by a malicious cloud host in as few as 5 messages to reveal who is communicating with who. In this paper published by NDSS, headed by Ian Martiny, these researchers found that Signal’s “read receipts”, which lets the sender know that the receiver got the message can be used as an attack vector to analyze traffic because it sends data packets right back to the sender. Therefore, our recommendation to increase metadata protection is turn off read receipts, which can be toggled in the security settings.
Source used: Improving Signal’s Sealed Sender Ian Martiny∗, Gabriel Kaptchuk†, Adam Aviv‡, Dan Roche§, Eric Wustrow∗ ∗, {ian.martiny, ewust}@colorado.edu †Boston University, kaptchuk@bu.edu ‡George Washington University, aaviv@gwu.edu §U.S. Naval Avademy, roche@usna.edu
https://www.ndss-symposium.org/ndss-paper/improving-signals-sealed-sender/ & Paper PDF: https://www.ndss-symposium.org/wp-content/uploads/ndss2021_1C-4_24180_paper.pdf
That would be true if it was implemting forward secrecy.
The problem is that signal knows exactly who you know. I would use simplex chat or session
It's not that obvious if millions of people do it. anyone can type criticism, you are not adding value
As long the encryption and everything else they do is as good as independant audits say they are, none of this matters, does it.
The only thing they know about any user is when the account was created, and when it was last online. That's all they're able to hand to law enforcement
Thanks for the reply but please check the article:
Sealed Sender is Flawed
Signal has a flawed system called “Sealed Sender”, which encrypts the metadata of who sent the message inside the encrypted packets. However, cybersecurity researchers from the University of Colorado Boulder, Boston University, George Washington University, and U.S. Naval Academy, found that Sealed Sender could be compromised by a malicious cloud host in as few as 5 messages to reveal who is communicating with who. In this paper published by NDSS, headed by Ian Martiny, these researchers found that Signal’s “read receipts”, which lets the sender know that the receiver got the message can be used as an attack vector to analyze traffic because it sends data packets right back to the sender. Therefore, our recommendation to increase metadata protection is turn off read receipts, which can be toggled in the security settings.
Source used: Improving Signal’s Sealed Sender Ian Martiny∗, Gabriel Kaptchuk†, Adam Aviv‡, Dan Roche§, Eric Wustrow∗ ∗, {ian.martiny, ewust}@colorado.edu †Boston University, kaptchuk@bu.edu ‡George Washington University, aaviv@gwu.edu §U.S. Naval Avademy, roche@usna.edu
https://www.ndss-symposium.org/ndss-paper/improving-signals-sealed-sender/ & Paper PDF: https://www.ndss-symposium.org/wp-content/uploads/ndss2021_1C-4_24180_paper.pdf
So.... Yes, Amazon has a contract with the CIA. They have for well over a decade now. In fact, I happened to work in AWS when that program first began.
It's called GovCloud and it's just a physically separated, hardened version of AWS. It's separate hardware to meet US govt requirements for handling data and the networks are not accessible from the public internet. Otherwise, it's just standard AWS stuff. The Men in Black want to use S3 too.
Anyway, yes, the CIA (like JPL and NASA and a bunch of non-scary orgs) makes use of GovCloud. That's not evidence that they're spying on Signal messages. And even if they are, they wouldn't have needed to set up a very public contract with Amazon. They'd just make a backroom deal and you and I would never hear about it. E.g. Even if signal switched to Azure is no guarantee.
Finally... If you're in the US, it's not the CIA you need to be worried about anyway. CIA is focused on foreign threats. The NSA is the group that spies on US citizens. And they have a massive data capture facility in Utah. They've got taps all over the backbone internet hardware in the USA. If anybody's watching your signal metadata, it's them. ...and they don't need Amazon's help to do it.
