Hybrid Cryptographic Scheme for Secure Communication in Mobile Ad Hoc Network-Based E-Healthcare System

Table 1

Summary of related work.

Authors	Cryptographic approach	Security services	Key management	Key size	MANET routing protocol	Attacks considered	Performance metrics
Ahmad and Ismail [5]	Selective encryption approach (symmetric)	(i) Confidentiality	No	128 bits	AODV	—	(i) Encryption time; (ii) Data transfer rate; (iii) Throughput
Echchaachoui et al. [6]	Asymmetric	(i) Confidentiality	Yes	—	OLSR-SDK	(i) Blackhole attack; (ii) DDOS attack	(i) PDR; (ii) End-to-end delay
Khan et al. [7]	PPE scheme	(i) Confidentiality	Yes	32 bits	DSR	(i) Adversarial attack	(i) Throughput; (ii) Encryption time; (iii) Energy consumption
Hamamreh et al. [8]	RAD protocol (MD5 and DH)	(i) Authentication; (ii) Confidentiality; (iii) Data integrity	No	128 bits	DYMO	—	(i) Avg. throughput; (ii) PDR; (iii) End-to-end delay
Vanathy and Ramakrishnan [9]	KEHECCS	(i) Authentication; (ii) Confidentiality	Yes	52 bits	—	(i) Key compromise attack	(i) Storage cost; (ii) Communication overhead; (iii) Throughput