[HN Gopher] Twilight: A Differentially Private Payment Channel N...
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       Twilight: A Differentially Private Payment Channel Network
        
       Author : nobody9999
       Score  : 57 points
       Date   : 2022-11-06 11:58 UTC (11 hours ago)
        
 (HTM) web link (www.usenix.org)
 (TXT) w3m dump (www.usenix.org)
        
       | rapnie wrote:
       | I was surprised when I saw the number of trackers on the page
       | (14) until I saw the sponsors. Now it is dawning on me, twilight.
        
         | vlovich123 wrote:
         | That feels more like an association fallacy than anything else.
         | Usenix is from Berkeley so it's inevitable that the two largest
         | companies in the Bay Area that have an interest in the kind of
         | content that is being organized would be funding it. This
         | observation might hold weight if this weren't the norm for
         | websites or if privacy were a focus for this organization. I
         | agree they probably should be doing that as leaders and to show
         | a way forward for legislators, but I'm also not going to judge
         | them harshly for focusing on their primary mission.
        
         | [deleted]
        
       | throwup wrote:
       | I'd love to know for sure whether this can interoperate with the
       | existing Lightning ecosystem. The paper makes one reference to
       | this in section 6.2.1, but it's unclear to me how it would work,
       | since the rest of the paper describes it as a wholesale
       | competitor.
        
       | woah wrote:
       | This uses a TEE (a chip that is hard to take apart contain a
       | private key provided by Intel), so the privacy system is very
       | boring (they think the person who owns the TEE will not be able
       | to see what the chip is doing).
        
         | jwlake wrote:
         | Look at this cool house I designed on sand.
         | 
         | It's odd to design a secure system and write a paper, when the
         | security is based on something like TEE. There's tons of
         | literature on breaking TEEs. I can't imagine anyone doing other
         | than checkbox compliance with that level of security.
        
           | 7e wrote:
           | The same could be said of cryptographic schemes and hashes in
           | general--always being broken!
           | 
           | However, that doesn't mean TEE don't provide a meaningful
           | level of security, especially when combined with Shamir
           | sharing between enclaves. Few actors will be able to
           | compromise 100 TEEs distributed across the world and made by
           | different vendors.
           | 
           | And just like cryptography, TEEs are getting better with
           | every release, and will soon be very, very hard to break.
        
         | kaladin-jasnah wrote:
         | Is my understanding that a TPM is also a TEE correct?
        
           | c7DJTLrn wrote:
           | TEE is more generalised, it runs arbitrary crypto operations.
           | TPM offers specific cryptographic operations using the keys
           | that it holds.
        
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       (page generated 2022-11-06 23:01 UTC)