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We started a new privacy podcast.
(lemmy.ml)
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this post was submitted on 25 Jul 2025
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Privacy
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I only read the signal link you posted, but the first link inside it complains that the signal server needs to know a users ip and that could be used to connect people and users. Ip addresses are required to send data. Ip obfuscation is insanely out of scope for a messenger.
The second link complains about sealed sender not failing closed which is true (or was true at the time) but also a reasonable compromise to prevent abuse and avoid it constantly failing and requiring new expirable tokens.
These are not reasons to not use or even not recommend signal. A person who is taking recommendations to increase their privacy should not be worried about those concerns.
Removing oneself from public records (or taking greater control over what surfaces in public records about oneself) is infinitely more important than expecting ip obfuscation or sealed sender from signal.
I am not making this reply to start an argument and will not engage in one. The point is to help readers understand that your concerns about signal are esoteric.
People are only expecting metadata protection (which is what "sealed sender", a term Signal themselves created, purports to do) because Signal dishonestly says they are providing it. The fact that they implemented this feature in their protocol is one of the reasons they should be distrusted.
For anyone reading along, that means people you send signal messages to can see your user account name maybe even if you click the button that’s supposed to make it not possible to do that.
Change your behavior accordingly.
No, it isn't about hiding your identity from the people you send messages to - it's about the server (and anyone with access to it) knowing who communicates with who, and when.
Michael Hayden (former director of both the NSA and CIA) famously acknowledged that they literally "kill people based on metadata"; from Snowden disclosures we know that they share this type of data with even 3rd-tier partner countries when it is politically beneficial.
Signal has long claimed that they don't record such metadata, but, since they outsource the keeping of their promises to Amazon, they decided they needed to make a stronger claim so they now claim that they can't record it because the sender is encrypted (so only the recipient knows who sent it). But, since they must know your IP anyway, from which you need to authenticate to receive messages, this is clearly security theater: Amazon (and any intelligence agency who can compel them, or compel an employee of theirs) can still trivially infer this metadata.
This would be less damaging if it was easy to have multiple Signal identities, but due to their insistence on requiring a phone number (which you no longer need to share with your contacts but must still share with the Amazon-hosted Signal server) most people have only one account which is strongly linked to many other facets of their online life.
Though few things make any attempt to protect metadata, anything without the phone number requirement is better than Signal. And Signal's dishonest incoherent-threat-model-having "sealed sender" is a gigantic red flag.