Neide Alves Dias De Sordi, José Alexandre Cavalcanti Vasco
Introduction: Long-term digital preservation must ensure the legal and evidentiary validity of signed documents, overcoming the limitations of traditional models (RDC-Arq and conventional PKI), which face challenges regarding longevity and dependence on Certificate Revocation Lists (CRLs). Objectives: To analyze the TRUSTER Preservation Model (TrustChain), developed by the InterPARES Trust Project, evaluating its effectiveness in mitigating structural weaknesses in digital signatures. Methodology: A normative adherence analysis and strategic evaluation of the TrustChain architecture were conducted against the requirements of e-ARQ Brasil (V2.0) and MoReq-Jus (2nd Edition). Its complementarity with the OAIS Model and the Trustworthy Digital Archival Repository (RDC-Arq) was also studied, focusing on long-term risk mitigation. Results: TrustChain demonstrated full adherence to the authenticity, integrity, and timeliness requirements of Brazilian standards. The TRUSTER VIP component offers strategic complementarity to the OAIS model and mitigates critical PKI risks, such as the CRL custody paradox and quantum computing vulnerabilities. The analysis confirmed technical and legal viability within the Brazilian context, including compatibility with ICP-Brasil and the Digital Diploma. Conclusion: TrustChain, through the TRUSTER VIP (Preservation of Validity Information) component, ensures perennial validity by providing external and unalterable proof of signature. Its adoption provides a solid foundation for enhancing Brazilian archival management and trustworthy digital preservation systems