• Technology
• Laboratory
• Hardware
• Possum

Profile of Secure Signing Module

• This is the evolving specification for Possum, a secure signing module.
• See

  • Possum for main information

  • Technology/Laboratory/Software/Possum for the developed design scope of the Software

  • Technology/Laboratory/Hardware/Possum for the developed design scope of the Hardware

  • Brain/Study/Possum/Hardware for the ongoing project concept

Requirements

• - Hardware must be readily sourcable and low cost.
• - Security not speed
  • - It should have the minimum exposure to security difficulties.
  • - From 1k to 100k signing operations per day (not a requirement but a design space)
• - It should have an application interface and a management interface,
  • - Interfaces preferably low-tech such as serial line.
  • - Interfaces need to integrate to normal PC hardware.
  • - Minimal other interfaces
• - Small footprint:
  • Low power, low heat
  • - Extra points for power isolation
  • small size - Small will help the physical security

Physical Security Module

• - Preventing of access via non-policy methods
• - Resists physical access
• - Detects probes
• - Etc

Views

• - Although these are listed as requirements, they are more design characteristics than hard requirements!
• - For the right rationale, anything can be varied.
• - Thought experiment: put it in a safe.