Multiuser communication scheme based on binary phase-shift keying and chaos for telemedicine

Area of Science:

• Biomedical Engineering
• Information Security
• Telemedicine

Background:

• Telemedicine relies on Body Area Sensor Networks (BASN) for biomedical solutions.
• Information security is critical as biomedical data is transmitted over insecure channels.
• Secure communication protocols for multiuser telemedicine networks are a significant challenge.

Purpose of the Study:

• To propose a novel secure communication scheme for multiuser telemedicine networks.
• To address the challenge of information security in transmitting biosignals over single channels.
• To develop a chaos-based encryption protocol for enhanced data protection in e-health applications.

Main Methods:

• A novel scheme utilizing binary phase-shift key (BPSK) and chaos-based encryption.
• Incorporation of the two-dimensional Hénon map with enhanced pseudorandom sequences.
• Application of Code Division Multiple Access (CDMA) technique for multiuser encryption and single-channel transmission.
• Simulation using electrocardiogram (ECG) and blood pressure (PB) signals in MatLab.

Main Results:

• The proposed scheme successfully encrypts and transmits biosignals securely in a multiuser BASN over shared wireless channels.
• Authorized personnel can retrieve original data using the secret key, while intruders see noise.
• The scheme demonstrates high resistance to noise and interference attacks, with low Bit Error Rate (BER) and Mean Squared Error (MSE), and high Peak Signal-to-Noise Ratio (PSNR).
• Sufficient key space and high secret key sensitivity were confirmed.

Conclusions:

• Enables secure remote patient monitoring and diagnosis through protected transmission of medical information.
• Facilitates secure transmission of multiple electrophysiological signals over a single channel in multiuser networks.
• Optimizes bandwidth usage in telemedicine applications, offering a low-cost solution.