Hybrid cryptographic

The second objective has been achieved by identifying the most frequent algorithm used in the hybrid technique. Figures 2 and 3 present the well-known symmetric and asymmetric schemes employed in hybrid approaches. Figure 2 shows that the AES symmetric scheme is widely used in hybridization as reported in many publications in 2013 which is more than 50% of the total publications. However, the least frequent use of this scheme was in 2014. However, theAES implementation picked up from 2015 to 2017. This indicated that this scheme has become the most popular scheme in the hybrid technique since it has been used broadly in many publications. This concurred with the report by Singhal and Raina (2011), where most studies in AES found that this algorithm was fast in both software and hardware. Therefore it is efficient to be implemented in a wide range of platforms. For asymmetric encryption method, ECC was found to be the most popular among others. The advantage of the scheme is the high speed of computation and greater storage efficiency as reported by Abbasinezhad-Mood and Nikooghadam (2018a) which is why it was implemented extensively in hybrid cryptographic approaches from 2013 to 2018.