crypto-protocol-diagram

Generate Mermaid sequence diagrams of protocol message flows and cryptographic operations.

6.5k|561|Updated Jan 14, 2026

Search Tags:#security analysis #Mermaid diagrams #TLS #cryptographic protocols #protocol visualization

Ready to run

npx skills add https://github.com/trailofbits/skills --skill crypto-protocol-diagram-trailofbits

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: crypto-protocol-diagram
Source: https://github.com/trailofbits/skills/tree/main/plugins/trailmark/skills/crypto-protocol-diagram
Command: npx skills add https://github.com/trailofbits/skills --skill crypto-protocol-diagram-trailofbits

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires pypdf, pdfplumber, pdf2image, and includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill helps users visualize the message flow and cryptographic operations within a protocol, providing a clear, diagrammatic representation of complex cryptographic interactions.

Core Features & Use Cases

Protocol Flow Visualization: Generate Mermaid sequence diagrams from source code, specifications, or formal models.
Cryptographic Operation Annotation: Label each step of the protocol with cryptographic operations such as key generation, encryption, decryption, and verification.
Use Case: A security analyst wants to visualize the handshake process for a TLS protocol. The user would use this Skill to generate a diagram from the relevant code or specification.

Quick Start

Use the crypto-protocol-diagram skill to create a sequence diagram for the TLS handshake protocol from the provided code 'tls-handshake.py'.

Frequently Asked Questions about crypto-protocol-diagram

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

FAQPage Schema

How do I generate a sequence diagram from a cryptographic protocol specification?▼

To generate a sequence diagram from a cryptographic protocol specification, extract message flow and cryptographic operations from source code, RFCs, or formal models to produce a Mermaid sequence diagram. This visualizes complex interactions for security analysis.

Can I visualize TLS handshake message flow from Python source code?▼

Yes, you can visualize TLS handshake message flow from Python source code. The processing logic parses Python code to extract protocol message flow and cryptographic operations, generating annotated Mermaid sequence diagrams for security analysis.

Does protocol visualization work with formal verification models like ProVerif and Tamarin?▼

Protocol visualization does work with formal verification models like ProVerif and Tamarin. The extraction process supports formal models alongside academic papers and RFCs to generate Mermaid sequence diagrams of cryptographic operations.

What is the best way to annotate cryptographic operations in a protocol sequence diagram?▼

The best way to annotate cryptographic operations in a protocol sequence diagram is to extract key generation, encryption, decryption, and verification steps directly from the source code or specification. This labels each sequence diagram step with its cryptographic operation.

Do I need Python libraries to parse RFCs for Mermaid diagram generation?▼

Yes, you need Python libraries like pypdf, pdfplumber, and pdf2image to parse RFCs and academic papers for Mermaid diagram generation. These dependencies process the input documents to extract protocol message flow.

Why use Mermaid sequence diagrams for cryptographic protocol security analysis?▼

You use Mermaid sequence diagrams for cryptographic protocol security analysis because they provide a clear, diagrammatic representation of complex message flow and cryptographic interactions. This visual format helps identify vulnerabilities in protocol design.