Based on Ethereum, Quorum is an open source blockchain platform that combines the innovation of the public Ethereum community with enhancements to support enterprise needs. Our mission is to make adopting blockchain a seamless process. Quorum is not just a platform - we provide full-service support.

1. A deep dive into
Quorum:
Privacy Mechanisms for
Enterprise
REDEFINE the Future of Supply Chain

2. Welcome
To the Quorum Community

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Agenda
• Overview
• Introduction to Ethereum
• Quorum over Ethereum
• Q&A

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Overview

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Why not Ethereum
• Public network without permission management
• Fully visible data in plain text
• Inefficient consensus
• Community-driven upgrade

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Why Quorum
Quorum is a fork of go-ethereum repository, which is official golang
implementation of the Ethereum Protocol. Currently developed and
maintained by J.P Morgan.

7. 2019 BSOS Project © All rights reservedREDEFINE
Why Quorum
Quorum is a fork of go-ethereum repository, which is official golang
implementation of the Ethereum Protocol. Currently developed and
maintained by J.P Morgan.
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📄🔒
📄🔒
A
B
C

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Introduction to Ethereum

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Ethereum features
• A permission-less p2p network
• Transactions are broadcast to all nodes
• EVM for smart contract
• Use PoW and GHOST to achieve byzantine agreement

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Ethereum network

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Ethereum network

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Ethereum network

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Ethereum network

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Ethereum network

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Ethereum network

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Ethereum network

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Ethereum
ethereum node
node architecture

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state
ethereum node
p2p
...
...
evm
api
other nodesend users
Ethereum node architecture

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Ethereum transaction flow
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🙍♀

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Ethereum transaction flow
🙍♂
🙍♀
{
...
to: nil,
data: CONTRACT_BYTECODE,
sig: SIGNATURE,
...
}

21. 2019 BSOS Project © All rights reservedREDEFINE
Ethereum transaction flow
🙍♂
🙍♀

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Ethereum transaction flow
🙍♂
🙍♀
📄
📄
📄

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Ethereum transaction flow
🙍♂
🙍♀
{
...
to: CONTRACT_ADDRESS,
data: send(‘❤’),
sig: SIGNATURE,
...
}
📄
📄
📄

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Ethereum transaction flow
🙍♂
🙍♀
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📄
📄

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Ethereum transaction flow
🙍♂
🙍♀
📄
📄
📄
❤
❤
❤
💕
!

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Quorum over Ethereum

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Quorum features
• Permission
• On-chain whitelist management by smart contract
• Privacy
• Private state for private data
• Constellation node for data encryption
• Performance
• High-performance consensus like Raft and IBFT

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Permission network

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Permission network
A
B
C
D
E

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Permission network
A
B
C
D
E
✅ A,B,C,D,E
📄

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Permission network
A
B
C
D
E
✅ A,B,C,D,E
📄
✅
✅
✅
✅
✅

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Permission network
✅
✅
✅
✅
✅
A
B
C
D
E
✅ A,B,C,D,E
📄

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Permission network
✅
✅
✅
✅
✅
A
B
E
✅ A,B,C,D,E
C
D
F
❌
❌
📄

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Permission network
✅
✅
✅
✅
✅
A
B
E
✅ A,B,C,D,E
C
D
F
❌
❌
,F
✅
📄

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Quorum node architecture
quorum node

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Quorum node architecture
public
quorum node

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Quorum node architecture
privatepublic
quorum node

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Quorum node architecture
constellation node
api
enclave
encrypted
data
privatepublic
quorum node

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Quorum private transaction flow
🏭
🏦B
E1
E2 !

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{
to: nil,
data: CONTRACT_BYTECODE,
privateFor: [E1],
...
}
Quorum private transaction flow
🏭
🏦 CONTRACT_BYTECODE
B
E1
E2 !

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Quorum private transaction flow
🏭
🏦
{
to: nil,
data: CONTRACT_BYTECODE,
privateFor: [E1],
...
}
CONTRACT_BYTECODE
B
E1
E2 !

42. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
encrypted data
B
E1
E2 !
CONTRACT_BYTECODE
{
to: nil,
data: CONTRACT_BYTECODE,
privateFor: [E1],
...
}
{
to: nil,
data: CONTRACT_BYTECODE,
privateFor: [E1],
...
}

43. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
{
to: nil,
data: ,
sig: SIGNATURE,
...
}
HASH

44. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
❌
HASH
HASH
{
to: nil,
data:
sig: SIGNATURE,
...
}
HASH
{
to: nil,
data:
sig: SIGNATURE,
...
}
{
to: nil,
data:
sig: SIGNATURE,
...
}

45. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
{
to: nil,
data:
sig: SIGNATURE,
...
}
CONTRACT_BYTECODE
{
to: nil,
data:
sig: SIGNATURE,
...
}
CONTRACT_BYTECODE

46. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
📄
📄

47. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
📄
📄
{
to: CONTRACT_ADDRESS,
data: send(‘!’),
privateFor: [B],
...
}
send(‘!’)

48. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
📄
📄
{
to: CONTRACT_ADDRESS,
data: send(‘!’),
privateFor: [B],
...
}
send(‘!’)

49. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
📄
📄
{
to: CONTRACT_ADDRESS,
data: send(‘!’),
privateFor: [B],
...
}
send(‘!’)
privateFor: [B]
encrypted data
send(‘!’)

50. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
📄
📄 send(‘!’)
send(‘!’)
{
to: CONTRACT_ADDRESS,
data: ,
sig: SIGNATURE,
...
}
HASH

51. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
📄
📄 send(‘!’)
send(‘!’)
{
to: CONTRACT_ADDRESS,
data: ,
sig: SIGNATURE,
...
}
HASH
{
to: CONTRACT_ADDRESS,
data: ,
sig: SIGNATURE,
...
}
HASH
{
to: CONTRACT_ADDRESS,
data: ,
sig: SIGNATURE,
...
}
HASH ❌

52. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
📄
📄 send(‘!’)
send(‘!’)
{
to: CONTRACT_ADDRESS,
data: ,
sig: SIGNATURE,
...
}
send(‘!’)
{
to: CONTRACT_ADDRESS,
data: ,
sig: SIGNATURE,
...
}
send(‘!’)

53. 2019 BSOS Project © All rights reservedREDEFINE
Quorum private transaction flow
🏭
🏦
CONTRACT_BYTECODE
B
E1
E2 !
CONTRACT_BYTECODE
📄
📄 send(‘!’)
send(‘!’)!
!

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Consensus - Raft
• Crash fault tolerance
• Immediately block finality
• Fast block time (25-50 ms)

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Consensus - Raft
A
B
C
D
E
• Crash fault tolerance
• Immediately block finality
• Fast block time (25-50 ms)

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Consensus - Raft
A
B
C
D
E
• Crash fault tolerance
• Immediately block finality
• Fast block time (25-50 ms)

57. 2019 BSOS Project © All rights reservedREDEFINE
Consensus - Raft
A
B
C
D
E
• Crash fault tolerance
• Immediately block finality
• Fast block time (25-50 ms)

58. 2019 BSOS Project © All rights reservedREDEFINE
Consensus - Raft
A
C
D
E
• Crash fault tolerance
• Immediately block finality
• Fast block time (25-50 ms)

59. 2019 BSOS Project © All rights reservedREDEFINE
Consensus - Raft
A
C
D
E
• Crash fault tolerance
• Immediately block finality
• Fast block time (25-50 ms)

60. 2019 BSOS Project © All rights reservedREDEFINE
Consensus - Raft
A
C
D
E
• Crash fault tolerance
• Immediately block finality
• Fast block time (25-50 ms)

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Consensus - Raft
A
C
D
E
• Crash fault tolerance
• Immediately block finality
• Fast block time (25-50 ms)

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Consensus - Istanbul BFT
• Byzantine fault tolerance
• Immediately block finality
• Operational flexible

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Consensus - Istanbul BFT
A
B
C
D
E
• Byzantine fault tolerance
• Immediately block finality
• Operational flexible

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Consensus - Istanbul BFT
A
B
C
D
E
• Byzantine fault tolerance
• Immediately block finality
• Operational flexible

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Consensus - Istanbul BFT
A
B
C
D
E
• Byzantine fault tolerance
• Immediately block finality
• Operational flexible

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Consensus - Istanbul BFT
A
B
C
D
E
• Byzantine fault tolerance
• Immediately block finality
• Operational flexible

67. 2019 BSOS Project © All rights reservedREDEFINE
Consensus - Istanbul BFT
A
B
C
D
E
• Byzantine fault tolerance
• Immediately block finality
• Operational flexible

68. 2019 BSOS Project © All rights reservedREDEFINE
Consensus - Istanbul BFT
A
B
C
D
E
• Byzantine fault tolerance
• Immediately block finality
• Operational flexible

69. 2019 BSOS Project © All rights reservedREDEFINE
Consensus - Istanbul BFT
A
B
C
D
E
• Byzantine fault tolerance
• Immediately block finality
• Operational flexible

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Recap - Quorum vs Ethereum
Permission Privacy
✅
📄
✅
✅
✅
✅

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Conclusion
• In Quorum network, peers still can communicate with privacy
• We can adopt more efficient consensus cause entities are not anonymous anymore
• Largest community supported project in EEA (Enterprise Ethereum Alliance)

72. Reach out
www.jpmorgan.com/quorum
www.github.com/jpmorganchase/quorum
http://bit.ly/quorum-slack

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Q&A

74. w w w. b s o s . t e c h
Thank You.