QTSP Diia
A qualified trust service provider platform for fast and transparent issuance of Diia.Signature for legal entities
#GovTech Case Study2026
QTSP Diia
The case shows how AMEDIA reduces a state certification process to a single integrated platform: identification, signature issuance, and legal document management operate as parts of one product rather than as separate departmental resources.
01 — OVERVIEW
One platform for trusted digital signatures
QTSP Diia is Ukraine's national qualified trust service provider platform, enabling fast and transparent issuance of Diia.Signature for legal entities. The platform combines automated certification, digital signature management, and document verification in one unified service.
QTSP Diia streamlines legal entity identity verification and qualified electronic signature issuance, replacing manual processes with automated workflows.
Purpose of the platform
Accelerate qualified signature issuance for legal entities—eliminating paperwork and manual verification delays.
What QTSP Diia changes
One integrated workflow for entity verification, certification and signature issuance. Automated compliance checking and instant document signing capability replace multi-step manual processes.
02 — WHO IT'S FOR
Four segments of legal entities
The platform serves different legal entity types and use cases:
Small enterprises
Startups and SMEs needing qualified signatures without complex certification infrastructure.
State institutions
Government agencies and public sector bodies requiring transparent, audited signature processes.
Financial and legal services
Banks, law firms and fintech companies handling high-value transactions and legal documents.
Digital transformation leaders
Organizations automating workflows and eliminating paper-based document processes.
03 — THE PROBLEM IT SOLVES
Manual certification and signature workflows
Legal entities faced four key constraints:
Qualified signature issuance required in-person visits and manual identity verification
No unified platform for entity certification, signature management and audit trails
Compliance verification was slow, error-prone and scattered across multiple agencies
Document signing remained paper-based or relied on non-qualified, non-compliant methods
QTSP Diia brings automated certification and instant qualified signature issuance to one platform.
04 — KEY FUNCTIONALITY
Three core components of the platform
Entity verification and certification
Automated identity and legal status verification using state registries and blockchain verification.
Qualified signature issuance
Instant creation of legally binding digital signatures for authorized representatives.
Document management and audit
Centralized storage, signing workflow, compliance tracking and immutable audit trail.
05 — HOW THE PLATFORM WORKS
Five steps from verification to signing
Five steps an authorized representative goes through on QTSP Diia:
Entity registration
Legal entity details and representative information entered into the system; verified against state registries.
Identity verification
Authorized representatives authenticate via ID.GOV.UA (BankID, qualified e-signature, Diia.Signature) or in-person verification.
Certification issuance
Platform issues a qualified certificate tied to the entity and individual representative, stored securely.
Document signing workflows
Representatives access the signature management portal, sign documents, and manage signature lifecycle.
Audit and compliance
Every signature creates an immutable audit record; compliance reports track certification and signing activity.
06 — AI AND AUTOMATION
Instant certification and compliance
Three strands of automation run on the platform, eliminating manual certification steps:
Automated identity verification
State registry lookups, blockchain verification, and document validation run instantly.
Certificate lifecycle automation
Instant issuance, renewal reminders, and revocation workflows execute without manual intervention.
Compliance and audit automation
Real-time compliance checking, signature validity tracking, and audit trail generation reduce administrative overhead.
07 — STATISTICS AND SCALE
QTSP Diia in numbers
08 — PRODUCT ADVANTAGES
A modern qualified signature platform
Instant issuance
Qualified signatures available immediately—no mail, no delays, no appointments.
Full legal compliance
All signatures meet ETSI standards and Ukrainian eIDAS-equivalent regulations.
One unified platform
Entity certification, signature management and audit trails in one place.
Transparent audit trail
Every action is logged, timestamped and cryptographically secured for compliance.
Direct state integration
State registries and ID.GOV.UA connected for real-time verification.
09 — INTEGRATIONS
State systems and external services
The platform connects to five external systems for verification and compliance:
ID.GOV.UA (ISEI)
Entity and representative identity verification via BankID, qualified e-signature.
State registry
Automated lookup of legal entity status and registration information.
Blockchain verification
Certificate and signature validation via distributed ledger for non-repudiation.
Email and notifications
SMTP, push notifications for signature and certification events.
Analytics and logging
Audit trail, compliance reporting and usage analytics.
10 — TECHNOLOGY STACK
Implementation technologies
BACKEND
NestJS 10, Node.js 18, TypeORM, Passport / JWT, PKCS#11 (HSM integration).
FRONTEND
Angular 17, Angular Material, SCSS.
MOBILE
Responsive web interface (no separate app).
CRYPTOGRAPHY
RSA 2048/4096, ECDSA, PKCS#1, X.509 certificate chains, eIDAS-compliant algorithms.
INFRASTRUCTURE
Docker, GitLab CI, high-availability deployment, load balancing.
SECURITY
Hardware security modules (HSM), TLS 1.3, CORS allowlist, rate limiting, bcrypt, 2FA (TOTP).
11 — PROVEN RESULT
Instant certification and legally binding signatures
QTSP Diia has automated qualified signature issuance for legal entities, turning manual certification into instant platform-based workflows.
The platform processes entity verification and signature issuance automatically, enabling organizations to sign documents instantly while maintaining full legal compliance and audit trails.
