Digital Certificate based Symmetric Key Anonymous Authentication for Secured Remote Health Monitoring in WBAN
Secure communication over WBAN is a significant and also a key problem to be solved. A lot of anonymous authentication techniques have been designed to perform secure data communication in WBAN. The performance of existing anonymous authentication techniques was not effective to get higher data security and privacy level. Therefore, Digital Certificate based Symmetric Key Anonymous Authentication (DC-SKAA) technique is proposed. The DC-SKAA technique is designed with key objective of attaining secure communication and thereby enhancing security and privacy level of patient’s medical data in WBAN. The DC-SKAA technique comprises three processes namely certificate and symmetric key generation, symmetric key encryption and symmetric key decryption. The DC- SKAA technique at first carried outs certificate and symmetric key generation where certificate authority issues certificate and symmetric key for each client and application provider in WBAN. Then, DC- SKAA technique performs symmetric key encryption in which sensed medical data of a patient is encrypted with assists of symmetric key of sender. Subsequently hash value is generated for each medical data using hash-based message authentication code (HMAC). This hash value and cipher text is broadcasted over a network to corresponding application provider. Thus, DC- SKAA technique gets better security and privacy for patient medical data in WBAN. At receiver side, DC- SKAA technique accomplishes certificate authentication where it allows only an authorized user to access original patient data with help of symmetric key. As a result, DC- SKAA technique obtains improved data confidentiality and integrity as compared to state-of-the-art works. The DC- SKAA technique conducts simulation process using metrics such as data privacy level, throughput rate, communication cost and data integrity rate with respect to diverse number of medical data and sensor nodes. The simulation result shows that the DC- SKAA technique is able to improve the data integrity rate and communication cost of remote health monitoring when compared to the state-of-the-art works.
