AUTHENTICATION:proces of validating identity of someone or sth aythentication system components: 1.authentication info:specific info with which entities prove their identities 2.complementary info:Set of info that system stores and use to validate authen i nfo. may contain more or few info than authen info 3.complementation function:generates complementry info from authen info 4.set of authen function:verifies identity 5.set of selection function:allows entity to create or alter authen and complem. info PASSWORD:Info associated with entity that confirms the entitys identity.its an a uthentication mechanism based on what ppl know. maybe seqeuence of chars or phra ses