(Mis)trust in the cyber era

•

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Albert Hui

Technologie

Who Am I?
Albert Hui
GREM, GCIA, GCIH, GCFA, GCFE,
GPEN, GXPN, GAWN, GSNA, CISA

SANS Advisory Board Member
GRC Consultant for Banks,
Government and Critical
Infrastructures.
Spoken at Black Hat, HTCIA-AP,
and
Economist Corporate Network.

Former HKUST lecturer.

Agenda
1. Trust Defined
2. Ramifications of Trusting Another Party
3. Privacy at Stake
4. The Solution?

Sad but True
“If you expect a cloud provider to do anything more
interesting than simply store your files for you and
give them back to you at a later date, they are
going to have to have access to the plaintext.”
Bruce Schneier

Why Important
to Reflect on Trust?

1
𝑅𝑖𝑠𝑘 =
𝑇𝑟𝑢𝑠𝑡

What Exactly is Trust?

Faith

Evidenced
Assurance

Knowing
Reality

Ideal

Risk is Often Outsourced

Insurance

Hedging

Public Key Infrastructure
Simplified

Certificate Authority

Alice

Bob

Compromised
Root Certificate Authorities

Reality
RISK OUTSOURCING

TRUST OUTSOURCING

1.

Assess risks

1.

Transfer trust

2.

Treat some risks

2.

3.

Terminate some risks

4.

Tolerate some risks

Trust that transferee is
trustworthy (secure, reliable
and aligns with your
risk appetite & risk strategy)

5.

Transfer remaining risks

Open Source’s “Many Eyes” Claim
Evidence to the Contrary
Generates Predictable Keys
(CVE-2008-0166)

Recap
“If you expect a cloud provider to do anything more
interesting than simply store your files for you and
give them back to you at a later date, they are
going to have to have access to the plaintext.”
Bruce Schneier

The Public-Private
Surveillance Partnership

Technologically Speaking

A court order is no different from an insider attack.

Suggestions
1. Conservative in assessing trust outsourcing risks.
2. Be skeptical.

3. Defense in depth.
4. End-to-end encryption.

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