constant-time-testing

Detect timing side channels in cryptographic code using dudect and timecop.

Updated Jun 9, 2026

Search Tags:#security #vulnerability assessment #analysis #crypto #timing attacks

Ready to run

npx skills add https://github.com/iiammae/opero --skill constant-time-testing-iiammae

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: constant-time-testing
Source: https://github.com/iiammae/opero/tree/main/.agents/skills/constant-time-testing
Command: npx skills add https://github.com/iiammae/opero --skill constant-time-testing-iiammae

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires dudect, timecop, valgrind, and includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill provides tools and guidance for detecting timing side channels in cryptographic code, helping developers secure their implementations against timing-based attacks.

Core Features & Use Cases

Timing Analysis: Offers a suite of tools for static, dynamic, and statistical analysis of cryptographic code.
Common Vulnerability Detection: Identifies common patterns leading to timing leaks, such as conditional jumps, array access, and division operations.
Remediation Strategies: Provides guidelines for fixing timing leaks and improving the security of cryptographic implementations.
Use Case: Use this Skill to audit a cryptographic library for timing vulnerabilities before deploying it in a production environment.

Quick Start

Run the dudect skill to perform a statistical analysis of your crypto function 'crypto_lib.c'.

Frequently Asked Questions about constant-time-testing

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

FAQPage Schema

How do I detect timing side channels in cryptographic code?▼

To detect timing side channels in cryptographic code, run statistical and dynamic analysis using tools like dudect and timecop. This process identifies secret information leakage caused by timing variations in conditional jumps, array access, and division operations.

What causes timing vulnerabilities in crypto implementations?▼

Timing vulnerabilities in crypto implementations are caused by execution time variations dependent on secret data. Common patterns leading to these timing leaks include conditional jumps, array access, and division operations that change execution duration based on secret values.

How do I audit a cryptographic library for timing attacks before deployment?▼

To audit a cryptographic library for timing attacks before production deployment, perform static, dynamic, and statistical analysis of the code. Use tools like dudect to measure execution time variations and identify common patterns leaking secret information.

Does valgrind work for detecting timing leaks in cryptographic code?▼

Valgrind is supported for detecting timing leaks in cryptographic code alongside dudect and timecop. These tools facilitate static, dynamic, and statistical analysis to pinpoint execution time variations that leak secret information during cryptographic operations.

What are the limitations of using statistical analysis for timing attack vulnerability assessments?▼

Limitations of statistical analysis for timing attack vulnerability assessments include the requirement for prerequisite knowledge of timing attacks and cryptographic code behavior. Analysts must interpret execution time variations carefully, as environmental noise can mask subtle timing leaks.