what is the balance between encryption systems and law enforcement's desire to have access to digital communication

what is the balance between encryption systems and law enforcement's desire to have access to digital communication.and  the difficulties of maintaining strong encryption with any encryption system that has a backdoor.help in this

why law enforcement, such as the NCA, is concerned about encryption

why providing backdoor access can have negative consequences

what alternative to providing backdoor access Facebook is offering

and end with a reasoned conclusion as to whether you think law enforcement should have access to a backdoor into encryption systems or not.