# An Image Hashing-Based Authentication and Secure Group Communication Scheme for IoT-Enabled MANETs
## 2 Related Work
As security is a key issue in MANET and the secure transmission of data is more crucial in recent years, several efficient solutions are proposed in his research to overcome these security issues. A game-based model is presented that detects different security attacks and secures all nodes. [PERSON] et al. [23] proposed a security-based model for MANETs. This model has analyzed the performance and behavior of nodes and the reputation of the system simultaneously. Moreover, results show that the system's performance has significantlyimproved, and throughput has been enhanced. [PERSON] et al. [PERSON] et al. (2018) presented a novel security architecture, ESMMCRT. Security is enhanced to protect against black hole attacks and reduces energy consumption. [PERSON] proposed a scheme based on an asymmetric key for the classification and verification of a large-scale MANET [PERSON] et al. (2019). The team leader issues certificates to all nodes. Each node provides the certificate without the assistance of any authority of trusted certification. Moreover, this scheme reduces network consumption and increases network deployment. Team leaders have membership nodes, and other team members can communicate with one another. As shown in Figure 1, the sender transmits the image hash to the receiver node by encrypting it with the public key of the receiver node. The receiving node decrypts the received image by using its private key. [PERSON] and [PERSON] have proposed a structured approach of key management; [PERSON] et al. (2019) the cluster head (CH) is selected for a group that contains the ultimate value of reliability. To calculate public and private keys for nodes, private key generation (PKG) has been utilized widely. The NA chooses the CH after the election, and the CA's offline limit is set to request a new node to connect to the network. The agent mobile is the segment of an application that obtains confidential data from several trusted network nodes and also information of nodes that the certificates have passed. SRIH [PERSON] et al. (2019), a secure and robust image hashing-based scheme, employs a Gaussian pyramid. Key-based encryption is utilized to secure the hash, and authentication is conducted based on image hashing. This scheme detects different malicious attacks and also provides resilience against malicious attacks. ESIH [PERSON] et al. (2019), an efficient and secure image hashing-based authentication scheme, is utilized with an improved design. Sufficient time must be provided for efficient authentication and verification. This plan has the following benefits: the node generates a public key based on a similar (n) origin and CA assigned to its node ID. Each node has a public key of self-disconnection, known as a cluster. Therefore, the cluster nodes do not press their public keys on all adjacent nodes, which occupy less of the network storage space and bandwidth simultaneously. The CH public key changes at times, and each CH compares its new public key against the value of the trust and the previous (larger) public key. The key renewal process is easily accomplished by using the timer in key numbers. Figure 1: Public-key distribution scenario with image hash [PERSON] et al. (2019).