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A version of the Electronic Shelf Label that utilizes the ESP32 CYD.
GitHub repository: https://github.com/Northstrix/ESP32-Cheap-Yellow-Display-Electronic-Shelf-Label-with-Google-Firebase
The tutorial is available at https://www.instructables.com/ESP32-CYD-ESL/
WebFlash: https://northstrix.github.io/ESP32-Cheap-Yellow-Display-Electronic-Shelf-Label-with-Google-Firebase/flash.html
Format Flash area designated for SPIFFS with ESP32 Filesystem Uploader (https://github.com/me-no-dev/arduino...
Petoron Seal Contracts (PSC)
Fully binary .psc contract format
TTL (time to live) built-in
Ed25519 participant signatures
Executed-flag to prevent reuse
External .sig signature support
Fully offline and P2P-ready
Compatible with Petoron Time Burn Cipher (PTBC)
https://github.com/01alekseev/PSC
Eng: Digital Signature with x.509 certificates and smartcards for PDFand PAdES format documents in Spanish for Windows OS (8 and 10). Esp: Firma Digital de documents electrónicos PDF en formato PAdES con certificados digitales X.509 y tokens criptográficos en español.
The OpenCoin project provides resources for creating virtual currencies: documentation, format and protocol definitions, an open-source reference implementation for issuers, users and traders. It is based on David Chaum's electronic cash concept.
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