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"A Hypothetical Public Cloud Do 
Over" 
! 
John Downey, 
Product Developer and Security Lead at 
Braintree 
! 
! 
Tweet: @jtdwney 
#cloudcamp 
Sponsored by 
Hosted by 
#cloudcamp 
@CloudCamp_CHI
A Hypothetical 
Public Cloud Do Over 
1
2
Gateway 
3
Why 
• Hypothetical exercise 
• Fun to think about 
• Most of this didn't exist when we started 
4
Amazon Web Services 
• PCI Level 1 Service Provider 
• Where our experience is 
• A lot of movement happening 
• Newer offerings 
• Virtual Private Cloud (VPC) 
• CloudHSM 
5
Virtual Private 
Cloud (VPC) 
6
7
8
Bank Connectivity 
• VPN hardware 
• MPLS link 
• Can't do with regular EC2 ! 
9
VPC 
• Replaces the network backing of AWS 
• EC2 
• RDS 
• many others 
• Allows greater control over IP addressing 
10
Bridge AWS to 
real hardware! 
11
Hardware 
Security Module 
(HSM) 
12
13
Security 
• Store keys in taper resistant way 
• Acceleration for cryptographic operations 
• Makes certain audits much easier 
14
CloudHSM 
• Pricey 
• $5,000 upfront for one 
• $1,373 average per month 
• You'll probably want at least two 
15
Disaster 
Recovery 
16
Disaster Recovery 
• Capacity planning can be hard 
• Physical hardware has lead times 
• Run Multi-region 
17
Photos 
• https://flic.kr/p/8avArb 
• https://flic.kr/p/8eRC2 
18

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