A simple chat room application showing an example Rolling QR Code implementation for initial auth. For each chat room, the QR Code changes periodically. Once the user scans the code and follows the ...

A modern web application for securely creating and verifying digital signatures for text and PDF documents, embedded into a QR Code. In the digital era, ensuring the authenticity and integrity of ...

There are still needs for paper-based documents in certain circumstances where electronic documents cannot efficiently replace them. For example, documents issued by the government such as birth ...

QR codes are a type of barcode, or scannable pattern, that contain various forms of data, like website links, account information, phone numbers, or even coupons. QR codes are found everywhere from ...