Add cryptography documentation

[quexten]

🎟️ Tracking

📔 Objective

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation
  team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed
  issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[claude]

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Deploying contributing-docs with    Cloudflare Pages

Latest commit:	7dbc9ea
Status:	✅  Deploy successful!
Preview URL:	https://34086b97.contributing-docs.pages.dev
Branch Preview URL:	https://km-crypto-docs.contributing-docs.pages.dev

View logs

[github-actions]

Checkmarx One – Scan Summary & Details – b2fbaab4-a46c-48f0-920d-77232bf4499f

New Issues (3)

Checkmarx found the following issues in this Pull Request

Severity	Issue	Source File / Package	Checkmarx Insight
	CVE-2025-30360	Npm-webpack-dev-server-4.15.2	details Recommended version: 5.2.1 Description: Webpack-dev-server allows users to use webpack with a development server that provides live reloading. Webpack-dev-server users' source code may b... Attack Vector: NETWORK Attack Complexity: LOW ID: mUtMlOjVdXbYYZ9qPvGslcd3%2FHRdIjo%2Bu0p7Fl9ldqw%3D Vulnerable Package
	Cxdca8e59f-8bfe	Npm-inflight-1.0.6	details Description: In NPM `inflight` there is a Memory Leak because some resources are not freed correctly after being used. It appears to affect all versions, as the... Attack Vector: NETWORK Attack Complexity: LOW ID: cwyth5xTdFkPHplCsfnynQuSocs5YR4WROkl2noLx4o%3D Vulnerable Package
	CVE-2025-30359	Npm-webpack-dev-server-4.15.2	details Recommended version: 5.2.1 Description: The webpack-dev-server allows users to use webpack with a development server that provides live reloading. The webpack-dev-server users' source cod... Attack Vector: NETWORK Attack Complexity: HIGH ID: HIbZKSJUA8IceRLC1pIdlyLDZFHm7cOa%2Bvt8e%2BNBJcc%3D Vulnerable Package