The complete automation of smart farming is achieved by ISO 7798-2 security specifica tions-heterogeneous swarms are used in cloud middleware to operate drones, autonomous vehicles, etc. Autonomous-vehicle secure connectivity using IoT devices and key management framework is demonstrated by Jha S. et al. [22]. The vehicular network authentication is performed by blockchain based on hash graphs that can perform thousands of transactions per second and a framework designed using batch rekeying and logical key hierarchy (LKH). The 5G cooperative autonomous connectedness and driving is presented by Bagheri H. et al. [23]. This system uses 5G-based extensive authentication protocol (EAP) supporting 3GPP and non-3GPP communication networks, independent access, and mobility management function with session management function. The autonomous communication within the P2P network is demonstrated by Rahmani L. et al. [24]. A distributed hash table for agent lookup is shared by all the communicating agents and uses public-key cryptography for secure P2P communication with end-to-end encryption. An IoT mutual authentication protocol for Things-To-Things (T2T) is presented by Lounis K. et al. [25]. The T2T protocol uses physical unclonable functions (PUFs) with dual-level-challenge response pairs for the IoT authentication. V2X communication-based efficient authentication for protection against DDOS is demonstrated by Ko T. et al. [26]. The V2X system uses a security credential management system (SCMS), which classifies multiple similar messages in different categories for authentication and uses advanced verify-on-demand (AVoD) for signature verification with threat analysis. An improved isolation forest method for autonomous-vehicles-attack detection is presented by X. Duan et al. [27]. The detection of data-tampering attack is performed here using **data** mass and scoring for anomaly detection as a part of intrusion detection. An autonomous vehicle smart-parking system with the fog-blockchain architecture is presented by Shahzad A. et al. [28]. Smart parking helps to recognize the parking location with the help of fog nodes to IoT, the proof-of-concept by lightweight blockchain and a cryptographic module is utilized. Blockchain-based autonomous vehicle platoon management in 5G is demonstrated by Wu B. et al. [29]. This real-time system improves traffic management with public-key cryptography and 5Genabled revocable attribute-based encryption (RABE) with key distribution and revocation. P2P drone communication using blockchain is presented by Kumar M.S. et al. [30]. The drone base communication uses blockchain with GPS coordinates to avoid spoofing attacks and keeps the blacklisted database.