Project Name
Connectivity Failures Elimination in High-Stakes Exam Delivery for a Large EdTech Platform Using Electron
Our client is a large-enterprise EdTech platform headquartered in North America, serving universities, certification bodies, and professional licensing boards. Their assessment product is the primary exam-delivery mechanism for hundreds of thousands of test-takers annually, spanning on-campus proctored sittings, remote monitoring environments, and multi-site corporate certification programmes.
As the platform scaled, the growing volume of media-rich exam content, such as embedded video questions, image-heavy case studies, and interactive simulations, began to strain the browser-based delivery architecture in ways that directly threatened completion rates and institutional standing.
The organisation needed a delivery model that could guarantee exam integrity and session continuity regardless of campus network quality, without dismantling its existing cloud-based content and results infrastructure.
A browser-dependent exam platform, congested campus networks, PWA storage that could not hold a media-heavy exam bundle, and no recovery path when connectivity dropped mid-session.
- Wi-Fi Contention Causing Mid-Exam Drops: Campus networks handling hundreds of concurrent sessions experienced peak-load failures. Browser-based exams had no recovery mechanism, resulting in lost responses and incomplete assessments.
- No Reliable Session Integrity Control: Standard browsers could not consistently prevent tab switching or external access across operating systems, compromising proctored exam integrity.
- PWA Storage Insufficient for Rich Content: Limited PWA storage quotas could not accommodate media-heavy exam bundles, forcing real-time downloads over congested campus networks.
- No Hardware-Binding for Exam Packages: Exam files lacked device-specific encryption, allowing downloaded content to be copied and accessed on other devices, creating a significant security risk.
- Fragile Submission Window: Responses were transmitted continuously instead of being securely packaged at submission, increasing the risk of incomplete or failed uploads during connectivity issues.
- Inconsistent Cross-Platform Behaviour: Browser performance varied across Windows, macOS, and Chromebooks, leading to inconsistent offline functionality and limited Chromebook support.
Ksolves, an AI-first web application development company, replaced the browser-dependent exam platform with a purpose-built Electron desktop application that manages the complete exam lifecycle, from secure pre-fetch and hardware-bound encryption to offline exam delivery and sealed submission. The solution eliminates network dependency during the exam, requiring connectivity only before the session begins and after it ends.
- Offline-First Exam Engine: The Electron application pre-fetches the complete encrypted exam bundle before the exam and stores it locally in IndexedDB (up to 2 GB), enabling fully offline exam execution with zero network calls.
- Hardware-Bound AES-256-GCM Encryption: Each exam package is encrypted using the device's unique identifiers, ensuring downloaded content can only be accessed on the authorized machine.
- Session Integrity Enforcement: The application enforces secure exam sessions by restricting external interactions at the application layer, ensuring consistent behavior across operating systems.
- Sealed Submission Bundle: Responses are securely stored locally throughout the exam and uploaded as a single encrypted payload after completion, eliminating partial submissions and transmission failures.
- Cross-Platform Consistency via Electron: A single Electron codebase delivers consistent offline storage, encryption, and exam behavior across Windows, macOS, and Chromebook devices.
Technology Stack
| Category | Technology |
|---|---|
| Architecture | Electron (v28) |
| Encryption | AES-256-GCM |
| Processing | IndexedDB + Service Worker |
| Infrastructure | AWS S3 + CloudFront |
| Platform | Echo360 Assessment API |
The implementation delivered a more secure, reliable, and scalable digital examination platform, improving both operational efficiency and exam integrity.
- Connectivity-Related Exam Failures Reduced: The offline-first architecture removes network dependency during exams, significantly reducing connectivity-related failures and improving completion reliability.
- Device-Level Exam Security Strengthened: Hardware-bound AES-256-GCM encryption ensures exam packages can only be accessed on authorized devices, with no unauthorized access reported since deployment.
- PWA Storage Limitations Eliminated: IndexedDB storage (up to 2 GB) reliably handles large exam bundles, removing preload failures and reducing pre-exam IT intervention.
- Partial Submission Issues Eliminated: Responses are submitted as a single encrypted payload after exam completion, preventing partial uploads and ensuring complete submission records.
- Unified Cross-Platform Support: A single Electron application delivers consistent exam performance across Windows, macOS, and Chromebook devices, expanding secure exam access across the campus fleet.
By replacing a browser-dependent exam platform with a secure Electron desktop application, Ksolves enabled reliable, offline-first exam delivery without compromising security or user experience. The solution eliminated network dependency during active sessions, strengthened exam integrity through hardware-bound encryption, and ensured consistent performance across devices. As a result, the institution now has a scalable and secure assessment platform capable of supporting high-stakes examinations with greater reliability, compliance, and operational confidence.
Does Your Exam or Assessment Platform Still Depend on Browser Connectivity to Guarantee Session Integrity?
