A Study on Secure Medical-Contents Strategies with DRM Based on Cloud Computing

Table 3

Requirement to lightweight process.

Items	Contents
Code size	Because a sensor is a small device and has a limitation, the algorithm should have a small size for it to run, achieved by reducing the number of code line.
Security strength	To process, the structure will be compacted; however, the encryption strength has to be kept strong.
Fast speed	The code should be optimized to speed up by decreasing the number of code lines and by removing useless codes.
Low energy consumption	To use IoT devices, a sensor usually uses an encryption algorithm, but the devices which are used in a home health care system have a limitation of having a small size, so low energy consumption is necessary, which may be achieved by decreasing the number of rounds in the encryption.