“Security” is termed as the state of being safe. The purpose of security is to prevent fraud and theft in any domain. Security systems have been advancing over the past few years due to technological advancements. To design smart security system project, A three-level security system can be developed with the help of RFID and GSM modules. The use of radio signals to identify, track, and sort objects is a non-contact, automatic identification method known as radio frequency identification (RFID).The need for securing homes exists since ancient days. Techniques for protecting the households are door locks, barred windows. etc. Nowadays, security systems are all automated which can detect undesired situations occurring at home while the owners are away. RFID has many applications, such as Kiosks that use RFID to manage resources. It can be implemented in library systems, tool tracking, attendee tracking, etc. The GSM module is a global system for mobile communication which is designed to monitor SMS (short messaging service) through wireless radiation. The GSM module has many compactable features such as voice clarity, international roaming, RTC(real time clock), etc.