Feat/crypto primitives

[OWK50GA]

Description

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• 🔧 Configuration change
• ♻️ Code refactoring
• ⚡ Performance improvement
• ✅ Test addition/improvement

Security Impact

• This change involves cryptographic operations
• This change affects account validation logic
• This change modifies smart contracts
• This change handles user private keys
• This change affects authorization/authentication
• No security impact

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• E2E tests added/updated (if applicable)

Test Coverage

• Current coverage: __%
• New/modified code coverage: __%

Manual Testing Steps

Breaking Changes

• This PR introduces breaking changes

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings or errors
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published

For High-Security Changes

• I have documented all security assumptions
• I have considered attack vectors
• I have added security-focused test cases
• I have reviewed against the threat model

Related Issues

Closes #
Related to #

Additional Context

Reviewer Notes

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[drips-wave]

Hey @OWK50GA! 👋 It looks like this PR isn't linked to any issue.

If this PR is for one of the issues assigned to you as part of a Wave, please link it to ensure your contribution is tracked properly. You can do this by adding a keyword to the PR description (e.g., Closes #123), or by clicking a button below:

Issue	Title
#18	Issue #3: Build Cryptographic Utilities with Secure Key Management	Link to this issue

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