IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________ Volume: 04 Issue: 03 | Mar-2015, Available @ http://www.ijret.org 165 SURVEY PAPER ON WAVELET BASED ECG STEGANOGRAPHY Pawar Kshetramala Dilip 1 , V. B. Raskar 2 1 Student, Electronics & Tele-communication, ICOER JSPM’ Pune, Maharashtra, India 2 Assistant Professor, Electronics & Tele-communication, ICOER JSPM’ Pune, Maharashtra, India Abstract The patient's confidential data should be safe and secure this is Act by Health Insurance Portability and Accountability Act (HIPAA). At the same time, there is a significantly growth in population. Numbers of patient care centers are used usually around the world in a Point - Of - care (PoC) applications. The Security systems are implemented to provide data integrity, privacy, and accessibility. Therefore, ECG signal of the patients and other physiological data of the patient’s like body t emperature, glucose level, blood pressure, position, etc., are collected by Body Sensor Networks (BSNs) at home. After that it will transmitted over network and then stored at hospital server. In this paper, it used the steganography method which is depending on discrete wavelet transform to accomplish HIPAA act. DWT technique is applied on the ECG signal to hide confidential information of the patient which provides privacy to confidential information. High degree privacy is provided to patient, also Stego ECG remains diagnosable. In this paper the steganography technique is used to provide the three tire securities to patient’s data. First security is providing by share key, second security is providing by scrambling matrix, third security is providing by vector level. Share key which is used for security is coded by ASCII value. XOR ciphering technique is used for share key. Share key value and scrambling matrix value should be same at transmitting side and receiving side of the data. Vector level is nothing but steganography level. Our system also ensures safety, scalability, and effectiveness. Keywords: ECG, Steganography, DWT, Encryption. --------------------------------------------------------------------***--------------------------------------------------------------------- 1. INTRODUCTION Hiding the confidential data in to other form of data is call as data steganography. The HIPAA regulations act says that, there should be a protection and security is provided to the patient's confidential information which is sent through the public network. As the patient privacy is important so patient can control his/her confidential health information that if anyone can access or control the information like name, age, gender, ID no., address, telephone number. Monitoring patients at their home can reduce due to increasing rush at hospitals and care centers like medical. Hiding patient's confidential information and other physiological data in ECG signal is the main goal. Provide secrecy, integrity, and accessibility to confidential information. The main branch of cryptography is steganography that involves hiding information in other secondary information. Hiding the information decrease the chance of the information being detected. Medical images has smaller size were the ECG signal has greater size. Therefore instead of medical image ECG signal is used in steganography process. The ECG signal of the patients is used to hide physiological data of patient like temperature, glucose level, blood pressure, position, etc., which are collected by using Body Sensor Networks (BSNs) at home and stored on hospital server by transmitted via network. Then that data is diagnosed by monitoring systems at hospital. At the same cost that the patient privacy is protected against intruders while data navigate in open network and stored in hospital servers. This technique allows hiding the confidential information of the patient in to ECG signal and thus gives guarantees the patient’s privacy and discretion. The main objective of steganography is to put the undisclosed message in the other coated media so that nobody can see that and both doctor and patient can communicate in secret way. The data security has improved by combining the more number of methods of steganography and the other techniques related to data hiding. The first steganography method is on hiding patient data which is confidential, inside ECG signal of patient which can be called as host signal. Additionally, the proposed method uses model which involves encryption to allow extracting the data which is hidden. That data can be extracted by only the authorized persons like doctors. In this paper, for the host signal, the ECG signal of patient is used and the patient private information and other physiological reading are hiding inside it. The main fact is that the ECG signal which is used here as a host signal because ECG information will collect by many of the healthcare systems. As compare to other host signal, ECG signal has large size thus it can hide more data than hiding data in other host signal. Therefore, for the small size secrete data the ECG signal will be right as a host. The proposed technique fallows the HIPPA, by providing open access for ECG signal and provides security for patient’s confidential information from unauthorized access. In this method the ECG signal with temperature, blood pressure and glucose level are collected by using body sensor network. By using Bluetooth the physiological readings collected from sensor are transfer to patient’s PDA device. The patient’s PDA device contains steganography technique and embedding operation which embed the patient secret information and patient physiological data inside the. ECG signal i.e. host signal.