DOI: 10.11648/j.ajcst.20260902.14 ISSN: 2640-012X

Architecting a Cryptographically Secure, AI-augmented Paradigm for High-stakes Educational Assessments

Partha Majumdar
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High-stakes standardised examinations, foundational to meritocratic educational systems, face a crisis of integrity due to systemic vulnerabilities exploited by sophisticated, organised networks. Traditional security measures have proven inadequate against upstream breaches in the physical supply chain, leading to large-scale paper leaks, eroding public trust, and necessitating costly re-examinations. This analysis presents a comprehensive architectural framework designed to fundamentally redesign the assessment ecosystem by integrating advanced, multidisciplinary technologies. The proposed paradigm leverages a permissioned Proof-of-Authority blockchain to create an immutable, transparent ledger for the entire examination lifecycle. Question sourcing is decentralised through a time-distributed micro-sourcing model, in which a vast network of educators submits limited batches of questions, thereby diluting the impact of any single insider threat. Each question is tokenised as Non-Fungible Content (NFC) and stored decentrally, with its provenance secured cryptographically. To achieve perpetual unpredictability and render "guess papers" obsolete, a neuro-symbolic artificial intelligence framework procedurally generates an infinite number of unique, mathematically guaranteed solvable problems. These items are then calibrated using Item Response Theory (IRT), enabling an Automated Test Assembly engine to create millions of individualised yet psychometrically equivalent question papers. The logistical vulnerability of physical transit is neutralised by a secure hybrid edge-printing model, in which encrypted test files are transmitted to examination centres and printed locally just minutes before the test begins, governed by a blockchain-based time lock. By replacing centralised points of failure with cryptographically verifiable, decentralised systems, this framework ensures absolute traceability, psychometric equity, and operational resilience, thereby restoring the sanctity and credibility of high-stakes educational assessments.

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