constant-time-analysis

Detect timing side-channel vulnerabilities in cryptographic code and output CI-ready JSON results.

6.5k|561|Updated Jan 14, 2026
One-click install
npx skills add https://github.com/trailofbits/skills --skill constant-time-analysis-trailofbits
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: constant-time-analysis
Source: https://github.com/trailofbits/skills/tree/main/plugins/constant-time-analysis/skills/constant-time-analysis
Command: npx skills add https://github.com/trailofbits/skills --skill constant-time-analysis-trailofbits

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Timing side-channel vulnerabilities in cryptographic code can leak secrets through execution timing variations. This skill analyzes code to surface dangerous timing patterns and guides developers toward constant-time implementations.

Core Features & Use Cases

  • Detects division, branching, and table-lookup timing vulnerabilities across multiple languages and architectures.
  • Provides guidance on safe, constant-time patterns and practical remediation strategies.
  • Outputs CI-friendly results to support automated security reviews and audits, across native and VM-compiled languages.

Quick Start

Run the analyzer on your cryptographic source to surface timing-based vulnerabilities and get guidance.

Frequently Asked Questions about constant-time-analysis

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I detect timing side-channel vulnerabilities in cryptographic code?

Timing side-channel vulnerabilities in cryptographic code are detected by analyzing source or bytecode to identify dangerous division, branching, and table-lookup timing patterns across multiple architectures. The analyzer flags these issues and guides developers toward constant-time implementations.

Can I run constant-time analysis across both native and VM-compiled languages?

Yes, constant-time analysis applies across native and VM-compiled languages and architectures. It examines bytecode outputs and source code to surface timing vulnerabilities in diverse cryptographic implementations.

How do I integrate timing leak detection into my CI pipeline?

You can integrate timing leak detection into CI pipelines by running the analyzer on cryptographic source code to output CI-ready JSON results. This automates security reviews and flags division, branching, and table-lookup timing issues during builds.

What types of timing issues cause secrets to leak in cryptographic implementations?

Secrets leak through execution timing variations caused by division, branching, and table-lookup operations in cryptographic code. Analyzing these patterns helps surface dangerous timing variations and provides guidance on safe, constant-time remediation strategies.

Does timing analysis require any specific dependencies or environments to run?

No specific dependencies are required to run timing analysis on cryptographic code. The analyzer operates directly on source or bytecode outputs and produces JSON results without needing additional environment setup.

What is the best way to remediate timing side-channel vulnerabilities after detection?

The best way to remediate timing side-channel vulnerabilities is to apply the constant-time patterns and practical remediation strategies provided by the analysis. It guides developers in replacing dangerous division, branching, and table-lookup operations with safe alternatives.