For designing remote user authentication schemes for different application areas like Wireless Sensors Networks (WSNs), Internet of Things (IoT), E-health care, Cloud Server, etc., which types of equipment are required in real time scenario.
A remote user authentication scheme using smart cards can be used which is based on the ElGamal's public key cryptosystem and it does not require a system to maintain a password table.
A lightweight mobile user authentication scheme for mobile cloud computing, based on cryptographic hash, bitwise XOR, and fuzzy extractor functions can also be used