The Aqara U400 combines Apple Home Keys with an Ultra-wideband radio to unlock your door as you approach with your smart ...

We tested highly rated smart locks that feature connectivity, changeable codes, and fingerprint readers. Find out which ones ...

Abstract: The conventional way of opening a room was used in the classrooms and laboratory rooms of the Colegio de San Juan de Letran Engineering building, wherein the doors were unlocked using the ...

Abstract: this paper discusses a new methodology in integrating digital signatures into printed documents using QR code technology. The proposed system will allow users to securely sign documents by ...