Over the last few decades,science has given us many new invention aiding and contributing more to human needs. We have acquired better control over things that were inaccessible in the past. We have built huge buildings, Banks ,companies where millions of workers come everyday. Therefore there is also a need of monitoring them. Digital Surveillance has also proven to reduce crime rates thus its implementation has given us very positive response.                                                            Image reference : Arlo Privacy and security Privacy as well as security are the most valued concerns whether it's of a company or an individual. There are various ways to ensure these two. An emerging solution to these vulnerable threat is Security cameras . these are playing a vital role in today's high-tech Surveillance s...

C omputer world is full of terminology which is sometimes difficult to understand. Today In this article we will explain Near field communication .Lets jump o the introduction WHAT IS NFC  Near field communication (NFC)  is a short range , high frequency wireless technology that enables wireless connection between two electronic devices within 4cm (1.6inch) NFC was jointly developed by  The tech giants,. Philips and Sony How does it work NFC uses short range wireless communication standard (Ecma-340, ISO/IEC 18092) to communicate. It establishes a peer to peer connection and is easy to set up than bluetooth/WiFi. It operates at 13.56 MHz  on ISO/IEC  18000-3  air interface and at rates ranging from 106 kbit/s to 424 kbit/s. Each full NFC device can work in three modes: NFC card emulation NFC reader/writer NFC peer-to -peer NFC card emulation Enables NFC-enabled devices such as smartphones to act like smart cards, allowing us...