Abstract: The embodiment herein provides a system for securing computer infrastructure and one or more devices that depend on one or more cloud platforms. The system includes a memory, and a processor that stores and executes a set of instructions. The processor is configured to (i) extract one or more information data from at least one of the cloud platforms or the devices that depends on the one or more cloud platforms, (ii) execute compliance tests to identify compliance and non-compliance in the one or more information data, (iii) generate a network topology map by querying the one or more information data, (iv) classify a connectivity between the one or more devices and their nature, (v) compute risk metrics, (vi) re-execute the compliance tests to detect changes, and (vii) implement security compliances without impacting a production or operational environment of the one or more cloud platforms.

Abstract: The embodiment herein provides a method for securely transmitting a firmware update image to a device using a key management system. The key management subsystem includes a cellular modem. The method includes (i) configuring a SIM of the cellular modem to update a public key of a server using a key manager module of the Subscriber Identity Module (SIM), (ii) enabling the SIM to receive an encrypted key package from the server, using the cellular modem, (iii) processing the encrypted firmware update image that has to be transmitted to the device using the SIM and (iv) transmitting the decrypted key package to the device to enable implementation of the decrypted key package into the device using the SIM.