Privacy

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Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.

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Why does Signal want a phone number to register if it's supposedly privacy first? (programming.dev)

submitted 3 days ago by [email protected] to c/[email protected]

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I remember a time when visiting a website that opens a javacript dialog box asking for your name so the message "hi " could be displayed was baulked at.

Why does signal want a phone number to register? Is there a better alternative?

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[–] Jason2357 1 points 6 hours ago (1 children)

That a timing attack could be successful is not a given. It’s a possibility, yes, but there is very likely sufficient mixing happening to make that unrealistic or unreliable. An individual doesn’t create much traffic, and thousands are using the server constantly. Calling it a honeypot or claiming the phone number and device is are available is a stretch.

Timing attacks can work in tor when you are lucky enough to own both the entrance and exit node for an individual because very few people will be using both, and web traffic from an individual is relatively heavy and constant to allow for correlation.

[–] [email protected] 1 points 6 hours ago

A timing attack is extremely realistic when you control one of the end devices which is a common scenario if a person gets arrested or their device compromised. This way you can then identify who the contacts are and with the phone number you can easily get the real name and movement patterns.

This is like the ideal setup for law inforcement, and it is well documented that honeypot "encrypted" messengers have been set up for similar purposes before. Signal was probably not explicitly set up for that, but the FBI for sure has an internal informant that could run those timing attacts.