Maximizing Secure Communication and Energy Harvesting in STAR-RIS-Assisted MISO Systems with Imperfect Eavesdropper Channel Information

The paper proposes a novel strategy to maximize the sum secrecy rate in a MISO wiretap network assisted by a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS), while ensuring minimum required energy harvesting at energy-harvesting eavesdroppers under imperfect channel state information.