[Cryptography] Blockchain without proof of work

[Dennis E. Hamilton]

From: cryptography <cryptography-bounces+dennis.hamilton=acm.org at metzdowd.com> On Behalf Of Phillip Hallam-Baker
Sent: Thursday, January 3, 2019 10:30
To: Cryptography Mailing List <cryptography at metzdowd.com>
Subject: [Cryptography] Blockchain without proof of work
 
[orcmid] [ … ]
 
So what is the current state of the art on blockchain without proof of work? Harber and Stornetta suggested publication in the Times. Which is of course recourse to a higher level notary. The next obvious approach is a circular firing squad of notaries that cross notify. Has anyone published anything further I should present?
 
Of couse, I could do what I usually do and re-invent stuff because I am too lazy to read the literature. But I rather doubt there is a literature in this case...
[orcmid] 
 
ALGORAND is a distributed ledger that avoids proof-of-work by reliance on a (Fast-and-Furious) Byzantine Agreement methodology.  See
https://www.algorand.com/ and also https://people.csail.mit.edu/nickolai/papers/gilad-algorand-eprint.pdf (PDF download).  Silvio Micali has also provided an ACM Learning webcast with an interesting slide-deck and commentary.  
 
I find the number of patents pending rather discouraging.  
 
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