Implement blind signature applications for privacy-preserving proofs**

[jobbykings]

Create advanced blind signature applications for privacy-preserving proofs, unlinkable signature generation, and anonymous proof authentication.

Requirements:
Blind signature application implementation
Privacy-preserving proof verification
Unlinkable signature generation
Anonymous proof authentication
Blind signature security verification
Privacy efficiency optimization

Acceptance Criteria:
GIVEN blind signatures, WHEN generated, THEN signer cannot see message content
GIVEN privacy preservation, WHEN enforced, THEN proof verification is anonymous
GIVEN unlinkable signatures, WHEN created, THEN signatures cannot be linked to requests
GIVEN anonymous authentication, WHEN performed, THEN proof validity is confirmed privately
GIVEN efficiency optimization, WHEN applied, THEN blind signature operations are fast

Files to Work On:

Backend:

backend/src/blindsignatures/BlindSignatureApplications.ts (new)
backend/src/blindsignatures/PrivacyVerifier.ts (new)
backend/src/blindsignatures/UnlinkableGenerator.ts (new)
backend/src/blindsignatures/AnonymousAuthenticator.ts (new)
backend/src/services/BlindSignatureService.ts (new)

Frontend:

frontend/src/components/BlindSignatures/PrivacyProofs.tsx (new)
frontend/src/components/BlindSignatures/AnonymousAuth.tsx (new)