TODAY | September 26, 2013
>> challenge. can you remember all your passwords, facebook, online banking , your insurance, no way, right?
>> how hard can it be to remember 1, 2, 3, 4?
>> pass words. if you have a more clever password, it's hard to remember all them. we met a guy who could make eight lot easier.
>> folks are you like me?
>> how are you supposed to remember passwords for 50 million things?
>> can you remember all your passwords?
>> i hate them.
>> reporter: credit cards, health care plans, social media , online shopping , heck you need one to debt a latte on your coffee card and remembering them, impossible.
>> spasword, password, pass word .
>> pain in the butt.
>> reporter: those are forced to dial
1-800 numbers and pray. wait, could the brains in the basement at purdue university have discovered the cure for the password play?
>> biometrics is the next step ford.
>> reporter: they think we all carry our own passwords with us. the retina in each eyeball is unique, retinal scans are already used in several countries as identification. could i put on some fancy contact lens and pretend i'm not somebody else?
>> no, it's clever than. that it will fix that out.
>> my voice is my pass povrmt this smartphone is recognizeing my voice, so i won't need a password. palm and fingerprints the latest version of the iphone uses fingerprint recognition and at this indiana kfc, staffers use their prints when logging on to cash registers.
>> it eliminates the risk of anybody finding out their passwords.
>> will i be able to do this to pay for my dinner at the restaurant.
>> you can use your arms, face, fingerprints.
>> reporter: that's better than my grandmother's maiden name ?
>> reporter: what's next, dna? until then, well, time for a new password. for "today," kevin tibbles, nbc news, west lafayette , indiana.
>> do you think kevin tickets is excited about this idea?
>> it's great t. future, get here now.
>> exactly. you have as to make them so complicated now. it can't just be your middle name . they make it harder to remember.
>> right here at nbc, we have to change it every week.
>> do have you that password keeper app? you put all your passwords in. i did. it's terrible, it's not working well.