No changes needed - security fixes already complete

[Copilot]

All security fixes and test updates from the review comments have already been implemented by the reviewer in prior commits.

Current State

Security fixes (commit ff89d69):

• Fernet HMAC: constant-time XOR comparison prevents timing attacks
• RSA signature: constant-time verification for equal-length path
• PBKDF2: default raised from 100 to 600,000 iterations per OWASP
• AES ECB: marked @Deprecated with migration guidance

Test fixes (commit 344ab7b):

• Legacy test explicitly passes iterationCount: 100 to preserve deterministic assertion
• New test verifies 600k default produces different (stronger) output
• All 51 tests pass

No additional changes required.

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[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• github.com (HTTP Only)
  • Triggering command: /usr/bin/ssh /usr/bin/ssh -o SendEnv=GIT_PROTOCOL git@github.com git-upload-pack 'open-runtime/runtime_ci_tooling.git' (packet block)
  • Triggering command: /usr/bin/ssh /usr/bin/ssh -o SendEnv=GIT_PROTOCOL git@github.com git-upload-pack 'open-runtime/runtime_ci_tooling.git' 0 -j ACCEPT (packet block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)