With the implementation of a BYOD policy, the security director should be concerned about malware and lost and stolen devices. Malware can compromise the corporate network if infected devices connect to it. Lost and stolen devices pose a risk of unauthorized access to corporate data and resources, potentially leading to data breaches. References := (CCNP Enterprise Wireless Design ENWLSD 300-425 and Implementation ENWLSI 300-430 Official Cert Guide)