UPSC CSE Prelims 2015
Statement 1 is correct. Near Field Communication (NFC) is a short-range, contactless wireless communication technology. It operates by utilizing electromagnetic radio fields, specifically through electromagnetic induction, to enable data exchange between two devices when they are brought into close proximity.
Statement 3 is correct. NFC technology is capable of employing encryption protocols when transmitting sensitive information. This feature is commonly implemented in secure applications such as mobile payments, access control systems, and ticketing, where data confidentiality and integrity are paramount.
Statement 2 is incorrect. NFC is designed for very short-range communication, typically limited to a few centimeters (e.g., up to 4 cm). This close proximity requirement is a fundamental aspect of NFC, contributing to its security by minimizing the risk of unauthorized interception. Therefore, the assertion that devices can be at a distance of even a metre is inaccurate for NFC technology.