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WingArc1st Inc. and Cybertrust Inc. have jointly developed “Trustee e-Seal,” a digital trust that verifies the source of a PDF, and will begin offering it from June 30, 2026.
With the increasing prevalence of AI-generated text, the risk of tampering is rising in electronic documents, including the embedding of malicious instructions and false information that cannot be detected by visual inspection. Ensuring authenticity is therefore a crucial factor in corporate business transactions.
Against this backdrop, WingArc has collaborated with Cybertrust to develop “Trustee e-Seal,” a new feature that verifies the issuer of a PDF document, in addition to “Trustee Timestamp”, which verifies the time of existence of a PDF document. “Trustee e-Seal” utilizes the “iTrust e-Seal Certificate” provided by Cybertrust, extending the functionality of “Trustee,” the document platform, to affix e-seals.
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By affixing “Trustee e-Seal” to a PDF, it is possible to prove “which organization issued it and when.” Recipients can verify the issuing company and corporate number, thus 100% verifying the issuing company and ensuring the reliability of the electronic document.
Furthermore, Trustee e-seal contract users will receive Trustee Timestamp free of charge. By combining proof of “who issued it (Trustee e-seal)” and “when it existed (Trustee Timestamp),” the authenticity of electronic documents can be strongly guaranteed.
This service is the result of a collaboration agreed upon in March 2026 to build a digital trust platform for the AI era, aiming to achieve both legal reliability and operational efficiency in completely paperless inter-company transactions, and to promote the realization of an advanced data utilization society suited to the AI era. PDFs, e-seals, and time stamps compliant with standard specifications maintain future compatibility and vendor-free flexibility. The electronic certification authority that issues the “iTrust e-seal certificate” has passed WebTrust for CA, an international auditing standard, and has also obtained “JIPDEC Trusted Service Registration (Certification Authority),” which is operated under strict regulations after conducting audits based on JIPDEC’s rigorous standards. “Trustee e-seal” ensures the highest level of reliability by adopting the “iTrust e-seal certificate” issued based on these rigorous operating standards.
SOURCE: PRTimes
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