Identity protocol v1: Difference between revisions
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Similar to [https://en.bitcoin.it/wiki/Fidelity_bonds#Announce.2FCommit_Sacrifices Announce/Commit Sacrifices] | Similar to [https://en.bitcoin.it/wiki/Fidelity_bonds#Announce.2FCommit_Sacrifices Announce/Commit Sacrifices] | ||
# MPK = master public key | |||
# TM = current block height | # TM = current block height | ||
# create transaction T2. | # create transaction T2. | ||
## must include OP_RETURN <digest of | ## must include OP_RETURN <digest of MPK> output | ||
## nlocktime = TM + 144 blocks | ## nlocktime = TM + 144 blocks | ||
## no more than 1000 bytes in size | ## no more than 1000 bytes in size | ||
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# broadcast T1, T2 until confirmed | # broadcast T1, T2 until confirmed | ||
==Creating | ==Creating a SIN== | ||
A SIN is the unique record identifier by which this identity will be known. | |||
# | # Prefix = 0x18 | ||
# | # SIN_Version = 0x01 | ||
# MD = ripemd160(MPK) | # MD = ripemd160(MPK) | ||
# SIN = base58_encode_check( Prefix + SIN_Version + MD ) | # SIN = base58_encode_check( Prefix + SIN_Version + MD ) | ||
==Validating the root identity information== | |||
# B1 = block w/ T1, B2 = block w/ T2 | |||
# Verify B2 height - 144 >= B1 height. Fail and waste sacrifice if not. | |||
and is provably | Thus a minimal root record is MPK and is provably | ||
* linked to the sacrifices | * linked to the sacrifices | ||
* MPK starts a new chain of digital signature trust, for further record updates | * MPK starts a new chain of digital signature trust, for further record updates | ||
After that, additional key-value pairs may be associated with the root record via updates verified by PPK, stored in an alt-blockchain or DHT somewhere. That is outside the scope of this minimal document. | After that, additional key-value pairs may be associated with the root record via updates verified by PPK, stored in an alt-blockchain or DHT somewhere. That is outside the scope of this minimal document. | ||
Revision as of 04:33, 28 June 2013
Design goals
Decentralized identity.
- Has some creation cost
- Sacrifice may be digitally proven, bootstrapping root of trust from blockchain data
- Start as anonymous; opt out of anonymity by attaching identifying key-value pairs (real.name = "John Smith").
Creating sacrifice transactions
Similar to Announce/Commit Sacrifices
- MPK = master public key
- TM = current block height
- create transaction T2.
- must include OP_RETURN <digest of MPK> output
- nlocktime = TM + 144 blocks
- no more than 1000 bytes in size
- create transaction T1
- must include >= 0.01 BTC fee
- must include OP_RETURN txid(T2) output
- no more than 1000 bytes in size
- broadcast T1, T2 until confirmed
Creating a SIN
A SIN is the unique record identifier by which this identity will be known.
- Prefix = 0x18
- SIN_Version = 0x01
- MD = ripemd160(MPK)
- SIN = base58_encode_check( Prefix + SIN_Version + MD )
Validating the root identity information
- B1 = block w/ T1, B2 = block w/ T2
- Verify B2 height - 144 >= B1 height. Fail and waste sacrifice if not.
Thus a minimal root record is MPK and is provably
- linked to the sacrifices
- MPK starts a new chain of digital signature trust, for further record updates
After that, additional key-value pairs may be associated with the root record via updates verified by PPK, stored in an alt-blockchain or DHT somewhere. That is outside the scope of this minimal document.