Abstract: The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal for dynamic data encryption in a communication system is provided. The method includes receiving, from a network entity, a list of network public keys including a plurality of network public keys and corresponding key indexes, generating a pair of keys including a user equipment (UE) public key and a UE private key in response to receiving the list of network public keys, randomly selecting a network public key from the list of network public keys received from the network entity, generating a shared secret key corresponding to the UE by using the randomly selected network public key and the UE private key, and encrypting data to be transferred between the UE and the network entity by using the generated shared secret key corresponding to the UE.

Abstract: A method and system for determining device presence in a mesh network and for directing messages to a destination within the network is presented. Node devices periodically issue device presences messages that are propagated through the network. Receiving devices store and analyze data from received device presence messages to determine presence and nodal distance to other nodes. Device presence message data can be used to route directed messages on the network and for network analysis.

Abstract: Provided is a self-onboarding method for an IoT device. The method includes: identifying, by the IoT device, a trusted device and at least one wireless network in a vicinity of the IoT device; based on identifying the trusted device in the vicinity of the IoT device, establishing, by the IoT device, a connection with an onboarding server through the trusted device; based on identifying the at least one wireless network in the vicinity of the IoT device, sending, by the IoT device, a list of the at least one wireless network to the onboarding server using the connection; receiving, by the IoT device, self-provisioning information from the onboarding server; and onboarding, by the IoT device, through the at least one wireless network based on the self-provisioning information.

Abstract: A method and system for determining device presence in a mesh network and for directing messages to a destination within the network is presented. Node devices periodically issue device presences messages that are propagated through the network. Receiving devices store and analyze data from received device presence messages to determine presence and nodal distance to other nodes. Device presence message data can be used to route directed messages on the network and for network analysis.

Abstract: This invention provides a resid cracking apparatus comprising a riser, reactor, stripper cum separator with adjustable outlets in flow communication with adsorbent and catalyst regenerators for converting hydrocarbon residues containing higher concentration of conradson carbon content, poisonous metals such as nickel & vanadium and basic nitrogen etc., into lighter and valuable products and a process thereof.