constant-time-testing

Audit cryptographic C code for timing side-channel vulnerabilities using dudect and timecop.

Updated Feb 26, 2026
One-click install
npx skills add https://github.com/keremtoker468-dotcom/restoran --skill constant-time-testing-keremtoker468-dotcom
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: constant-time-testing
Source: https://github.com/keremtoker468-dotcom/restoran/tree/main/.claude/skills/constant-time-testing
Command: npx skills add https://github.com/keremtoker468-dotcom/restoran --skill constant-time-testing-keremtoker468-dotcom

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers and security auditors identify and fix timing side-channel vulnerabilities in cryptographic implementations, which can leak secret information through execution time differences.

Core Features & Use Cases

  • Detect Timing Leaks: Uses statistical analysis (dudect) and dynamic tracing (timecop) to find vulnerabilities.
  • Pinpoint Root Causes: Identifies specific code sections responsible for timing differences.
  • Use Case: You've implemented a custom encryption algorithm and suspect it might be vulnerable to timing attacks. This Skill guides you through testing and remediation to ensure its security.

Quick Start

Use the constant-time-testing skill to audit the provided C code for timing vulnerabilities.

Frequently Asked Questions about constant-time-testing

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

FAQPage Schema
How do I audit cryptographic code for timing side-channel vulnerabilities?

To audit cryptographic code for timing vulnerabilities, you must detect execution time variations that leak secret data. This Skill guides you through using statistical analysis and dynamic tracing to pinpoint exact code sections responsible for timing leaks.

What is a timing attack and how does constant-time testing prevent leaks?

A timing attack exploits execution time differences to extract secret keys or sensitive data. Constant-time testing prevents leaks by using statistical analysis and dynamic tracing to identify and help remediate code sections causing measurable time variations.

How do I use dudect and timecop to detect timing leaks in custom encryption?

You detect timing leaks using dudect for statistical analysis and timecop for dynamic tracing. This Skill integrates both tools to comprehensively test custom encryption algorithms and pinpoint root causes of timing differences in security-sensitive codebases.

Can I use statistical analysis to find timing vulnerabilities in C code?

Yes, you can use statistical analysis to find timing vulnerabilities in C code. This Skill applies statistical techniques to measure execution time variations, pinpointing specific C code sections responsible for leaking secret information through timing differences.

Does this constant-time testing approach work for security-sensitive codebases handling secret keys?

Yes, constant-time testing is specifically designed for security-sensitive codebases handling secret keys. It uses statistical and dynamic analysis to detect and remediate timing side-channel vulnerabilities that could leak sensitive information.

What are the limitations of dynamic tracing for timing vulnerability analysis?

Dynamic tracing for timing vulnerability analysis requires integration with specific tools like dudect and timecop for comprehensive testing. While it pinpoints root causes of timing differences, effective remediation demands understanding the underlying cryptographic implementation.