[curves] Proof of Transition to keep DNSChain servers honest

[Tao Effect]

Apologies, I meant to send it to [messaging], not [curves]. I don't think this is very applicable to this list (I just have them both go to the same folder and didn't notice I picked the wrong email address to send to).

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On Mar 25, 2015, at 7:43 PM, Tao Effect <contact at taoeffect.com> wrote:

> Dionysis Zindros came up with the following mechanism to prevent DNSChain servers from forging blockchain data (copied from our blog post):
> 
> 3. Use Proof-of-Transition (PoT). PoT is a simple but powerful idea that Dionysis Zindros came up with (which we plan to elaborate on in future work). Briefly: clients store the public key fingerprints of the blockchain transaction that corresponds to a domain. These correspond to the public key that was used to update the blockchain entry. When a new SSL/TLS cert is seen, require DNSChain to provide proof in the form of the transaction(s) that were used to update the blockchain entry. If these transaction(s) were signed by the original public key, we can be assured that DNSChain is not cooking the books.
> 
> From "Certificate transparency on blockchains"
> 
> https://blog.okturtles.com/2015/03/certificate-transparency-on-blockchains/
> 
> Greg
> 
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> Please do not email me anything that you are not comfortable also sharing with the NSA.
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