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Firmador y verificador web de PDFs para Ecuador — firma PAdES con tu .p12 (ARCOTEL) 100% en el navegador; la llave nunca sale de tu equipo. PWA open source (AGPL-3.0) + licencia comercial. Privacy-by-design / LOPDP.
Spring Boot–based digital signature platform built with Kotlin, enabling secure, tamper-proof PDF signing and verification workflows. It supports PKCS#7 detached digital signatures, visible signature appearances, and multi-party signing flows (Seller → Buyer) while preserving signature integrity using incremental PDF updates.