Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a user equipment (UE). The method generally includes receiving lower layer signaling indicating that the UE is to handover to one or more first physical cell identifiers (PCIs) to be used for communication between the UE and the BS and communicating with the BS in accordance with a security key and using the one or more first PCIs, the security key being associated with a PCI.