Scientists Trying to Do Away With Passwords

hacker - n. a person who illegally gains access to and sometimes tampers with information in a computer system

password - n.  secret word or phrase that a person must know before being given permission to enter a place

smartphone - n. a cell phone that includes additional software functions (as e-mail or an Internet browser)

authenticate - v. prove that something is real, true, or genuine : to prove that something is authentic