Muneeb Ali - Experiences with Scaling Blockchain …Muneeb —> Krugman 2 coins (confirmed) Bill...

Experiences with Scaling Blockchain-based Data Stores

Onename. Decentralized identity on the bitcoin blockchain Presentation at


Muneeb Ali, Co-Founder & CTO



Table of Contents

Brief Intro to Bitcoin

A Simplified Model of Blockchain Time

Ownership Using blockchain as data store / naming

Why We Need Decentralized Identity

Experiences from a Production Network

Blockstore: Key-Value Store on BTC Blockchain



Bitcoin



Let’s design a new currency…

Ledger Currency



Ledger Currency


Muneeb Ali 10 coins

Brian Kernighan 10 coins



Ledger Currency


Muneeb Ali 10 coins


Paul Krugman 0 coins



Ledger Currency


Muneeb Ali 10 coins



Muneeb —> Krugman 2 coins (unconfirmed)



Ledger Currency


Muneeb Ali 8 coins



Muneeb —> Krugman 2 coins (confirmed)



Congratulations!

You just learned how Bitcoin works.



Ledger Currency

Muneeb Ali 8 coins




Bill Gates 0 coins



Ledger Currency

Muneeb Ali 8 coins




Bill Gates 0 coins

Muneeb —> Bill 2 coins (unconfirmed)



We need a distributed ledger (blockchain)



Distributed Ledger

It’s a file! It grows as you make more transactions

Blockchain



How Blockchain Works

•  Private-public key pairs




•  Private-public key pairs

•  Bitcoin address = deterministic from pubkey




•  No such thing as a “bitcoin”. Only inputs and outputs

•  21 million total bitcoins (fixed)

•  50 BTC minted each block, halved to 25 BTC




000009ff7ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069




1 2 3

….. 3000

•  Time

•  Ownership




1 2 3

….. 3000

Register hash(name) Update name



Decentralized Identity

Blockchain



What is Onename?

Blockchain



Lessons from Namecoin

Blockchain

•  Reliability and security of the blockchain

•  Limit on size of data (520 bytes)

•  Software engineering challenges

•  Scalability challenges



Blockstore

Blockchain



Blockstore

Blockchain

n0 k0

n1 k1

n2 k2

nm-1 km-1

nm km

.

.

.

.

Secure Index (Blockchain)

(name, key) (key, value)

DHT Storage (Kademlia-TX)

160-bit space

(k0,v0)

1 0

1

1

1

1

1

1

0

0 0

0

0

0

11..11 00..00



Blockstore

Blockchain

•  Opensource (python), simpler (no blockchain functionality)

•  Can support multiple data stores (mirrors)

•  Separates control plane from data plane

•  Enables to experiment with namespaces / spamming / pricing



Application: auth

Blockchain Central Data Repository

Company A

Company B

Company C

Access Control



Question?

Thank You!

[email protected]

@muneeb

Muneeb Ali - Experiences with Scaling Blockchain …Muneeb —> Krugman 2 coins (confirmed) Bill...

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