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DMing privately on Lemmy
(self.privacyguides)
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this post was submitted on 17 Jun 2023
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Yeah, at least Lemmy tries to warn users not to use the DMs to send sensitive or private information, and suggests using a dedicated encrypted messenger instead:
The developers are very busy developing lemmy-specific features and encrypted DMs would be a lot of work to create something that is a bit redundant. But I am sure that if someone would want to make that, they would appreciate that help.
Personally I wouldn't trust 2,000 random guys any more than 2 random guys. I assume any of my unencrypted communications are public.
Just to add to this, they have a separate option
Send Secure Messagewhich opens Matrix private room directly if the user has Matrix handle added to their Lemmy profile.I might as well start learning how to use matrix too with how I finally got into lemmy. Time to start learning alternatives to commercially available services.
Ohh, I did not know that! I should add a Matrix handle then
You can always trust a large cooperation to keep your data secret more than any random individuals. They have accountability for losing your data, much more so than the people on the fediverse. A big data breach leads to class action for reddit, here it just takes down an instance and lowers the validity of the technology.
Yeah, that is true. But:
A large site often collects a lot more sensitive data about a users such as phone numbers, ips, devices, activities, browser fingerprints, and even correlates accounts
Because of the value and quantity of the data, large sites will be attacked more often
However, a large enough data breach to be publicly exposed is not the only concern. I think that large sites pass their un-encrypted communications through filters to detect 'illegal activities', and in some countries 'illegal' can mean simply criticizing a powerful individual. Companies also use unencrypted communications to mine information that may be valuable to advertisers.
I would not be surprised to learn that an intelligence agency has the ability to search through the plaintext of all of the DMs from a big site. Sites may give this ability to intelligence agencies in oppressive governments to track the activities of politically inconvenient journalists, for example. Laws can also change, and at some point it could be made legal to search through messages to detect even minor crimes. This may be unlikely, but it is possible.
The pressures and stakes are different, but I wouldn't trust either a big company or two guys. If it is important for you that your DMs remain private, then you should generate your own keys, encrypt messages yourself, and keep the keys safe.
Honestly, seems like Lemmy could be a pretty good implementation of asymmetric PKI as well, the instance could easily host your public key as part of your profile, and only the user would have the private key.
There’d be some vulnerability around key issuance and recovery, but with a good official app, most users would just store the private key in the Keychain or Android Keystore, and would never bother with exporting the keys.