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From: Koen Martens <in+usenet@metro.cx>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: End-to-end encrypted Talk server
Date: Sat, 17 May 2025 07:54:24 +0200
Organization: Sonologic AB
Message-ID: <10098ag$1epk$1@nntp.sonologic.net>
References: <100645r$25oq$15@gallifrey.nk.ca>
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Den 2025-05-16 kl. 21:09, skrev Marco Moock:
> On 16.05.2025 15:32 Uhr Dan Cross wrote:
> 
>> By "talk" do you mean `talk(1)` etc?  If so, then the answer is
>> no, unfortunately.  I don't believe that `talk` or `ntalk` was
>> ever a protocol that supported encryption.  Of course, it is
>> possible that someone created a local variant at some site that
>> did, but if so, it was not widespread.
> 
> Isn't it possible to connect the systems through an encrypted tunnel,
> e.g. IPsec, and then use that for communication?
> 

That still wouldn't be "end-to-end encryption", since the path from the 
talk program to and through the netwerk stack, until it hits the 
encrypted tunnel, would all be plain text and potentially available for 
snooping (by your admin for eg, but then again, if you don't trust your 
admin, all bets are off).

Cheers,

Koen

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