Privacy-Preserving AI-Enabled Decentralized Learning and Employment Records System

TL;DR

This paper introduces a privacy-preserving, AI-enabled decentralized system for learning and employment records that automates skill credentialing, enhances security, and reduces bias in job matching using trusted execution environments and NLP.

Contribution

It presents a novel decentralized LER system integrating AI, blockchain, and trusted execution environments for automated skill extraction and privacy-preserving credential verification.

Findings

NLP pipeline accurately maps transcripts to skill vectors with <5% variance.

System ensures unforgeability of credentials and confidentiality of sensitive data.

Job matching is unbiased and solely based on verified skill vectors.

Abstract

Learning and Employment Record (LER) systems are emerging as critical infrastructure for securely compiling and sharing educational and work achievements. Existing blockchain-based platforms leverage verifiable credentials but typically lack automated skill-credential generation and the ability to incorporate unstructured evidence of learning. In this paper,a privacy-preserving, AI-enabled decentralized LER system is proposed to address these gaps. Digitally signed transcripts from educational institutions are accepted, and verifiable self-issued skill credentials are derived inside a trusted execution environment (TEE) by a natural language processing pipeline that analyzes formal records (e.g., transcripts, syllabi) and informal artifacts. All verification and job-skill matching are performed inside the enclave with selective disclosure, so raw credentials and private keys remain enclave-confined. Job matching relies solely on attested skill vectors and is invariant to non-skill resume fields, thereby reducing opportunities for screening bias.The NLP component was evaluated on sample learner data; the mapping follows the validated Syllabus-to-O*NET methodology,and a stability test across repeated runs observed <5% variance in top-ranked skills. Formal security statements and proof sketches are provided showing that derived credentials are unforgeable and that sensitive information remains confidential. The proposed system thus supports secure education and employment credentialing, robust transcript verification,and automated, privacy-preserving skill extraction within a decentralized framework.