Re: Chainpoint

On 9 September 2016 at 16:39, Melvin Carvalho <melvincarvalho@gmail.com>
wrote:

>
>
> On 9 September 2016 at 16:32, Adán Sánchez de Pedro Crespo <
> adan@stampery.co> wrote:
>
>>
>> > What are you looking for in a block chain vocabulary?
>>
>> Specifically for data anchoring, I'd look for, at least:
>>
>> 1. Names for different hashing algorithms.
>>
>> A software tool for verifying blockchain proofs should know which
>> algorithm to follow when reconstructing the hash chain from the original
>> data hash / target hash to the merkle root.
>>
>> This identifier must not only specify which was the hashing algorithm
>> applied to the original dataset, but also tell if a merkle tree was used
>> and if so, the "mixing function" [1].
>>
>> Example values:
>> + "SHA2-256-merkle-bin": 256 bits SHA-2 hash of the concatenation of the
>> binary value of two hashes. This is used by Tierion.
>> + "SHA2-512-merkle-hex-com": 512 bits SHA-3 hash of the commutative
>> concatenation of the hexadecimal value of two hashes. This is used by
>> Stampery.
>>
>> 2. Names / codes identifying different chains
>>
>> Names or codes should be defined to identify the different chains and
>> anchoring strategies that are broadly used.
>>
>> For example, Chainpont defines "BTCOpReturn" for Bitcoin and "ETHData"
>> for Ethereum. On the other hand, Stampery BTA defines "1" for Bitcoin,
>> "2" for Etherum Classic, "3" for Ethereum Fork and their negative
>> counterparts ("-1"/"-2") for their livenet versions [2].
>>
>
> Oh, excellent!  Yes I see a need for this.  Manu has done some work on
> naming algorithms.
>
> There is also an IANA registry at the IETF.
>
> RFC 6920 does some work on naming hashing algorithms for example.
>
> I think this would be a great thing to standardize.
>
> But isnt there some complexity involved?  e.g. Proof of work is not simply
> proof of work.  There are also max difficulty changes, number or blocks to
> difficulty change.  Things like Kimoto Gravity Well etc.  Any thoughts on
> how to enumerate all these different flavours of the same concept?
>

seeAlso

https://www.iana.org/assignments/named-information/named-information.xhtml


>
>
>>
>>
>> References:
>>
>> [1] Elixir examples of different mixing functions for usage in binary
>> Merkle trees:
>> https://github.com/stampery/elixir-merkle/blob/master/lib/mixers.ex
>> [2] Stampery BTA whitepaper:
>> https://s3.amazonaws.com/stampery-cdn/docs/Stampery-BTA-v5-whitepaper.pdf
>>
>> Best,
>> --
>> *Adán Sánchez de Pedro Crespo*
>> CTO, Stampery Inc.
>> San Francisco - Madrid
>> T: +34 663 163 375
>>
>>
>