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Embedded Hardware Blockchain: Towards Concrete Security Metrics Colin OFlynn Dalhousie University coflynn@dal.ca September 8, 2018 Colin OFlynn (Dalhousie University) Embedded Hardware Blockchain September 8, 2018 1 / 18 Overview

SLIDE 1

Embedded Hardware Blockchain: Towards Concrete Security Metrics

Colin O’Flynn

Dalhousie University coflynn@dal.ca

September 8, 2018

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SLIDE 2

Overview

Motivation

Hardware Blockchain Background

Embedded Hardware Blockchain Security

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SLIDE 3

Blockchain is Life

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SLIDE 4

AsicVault.io

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SLIDE 5

AsicVault.io

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SLIDE 6

AsicVault.io

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SLIDE 7

”Unhackable”, by John McAfee

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SLIDE 8

Hardware Blockchain Background

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SLIDE 9

Part 1: Block

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SLIDE 10

Part 2: Chain

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SLIDE 11

Blockchain 101: Example in Voting Machine Security

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SLIDE 12

Blockchain 101: History

May 11, 2008: First concrete implementation by Homer Simpson. October 31, 2008: Satoshi Nakamoto releases computer-based version.

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SLIDE 13

Embedded Blockchain

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SLIDE 14

Embedded Blockchain: Concrete Implementation

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SLIDE 15

Blockchain Security Threats

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SLIDE 16

Existing Strength Testing

Considerable existing body of knowledge around compressive strength of concrete masonry units (CMU). Chain testing in both load strength and hardness. Testing done in laboratory environment.

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SLIDE 17

Real-Life Considerations

Attacks during transport are large risk, installed device may have been compromised in transport. Issues such as incorrect salt usage weaken both block & chain (concrete curing, excessive corrosion). New and novel attacks rarely considered in existing literature (liquid nitrogen, hammer drill, etc).

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SLIDE 18

Conclusions

Blockchain - Builds up large body of existing work

Usage of Blockchain proposed by H. Simpson in 2008, made popular by S. Nakamoto with computer based version.

Embedded Blockchain Security

We can use existing research on block and chain strength, which scale well to embedded sized block and chains.

Security Threats - More Work Needed

Existing metrics poorly capture risk of threats such as in-transport attack and salt problems.

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