Re: @asdf (was: This plonker claims to have invented the common or garden padlock?)
Correct. Jake is embarrassing himself by repeatedly insisting he's right when he's demonstrably not.
* A padlock opened only by a key (something you have) is 1-factor authentication.
* A padlock opened only by a pin (something you know) is 1-factor authentication.
* If you had a padlock with both, *that* would be two-factor authentication.
Claiming that the lock itself is a factor if authentication is just plain wrong: Making a payment with your chip & PIN card is 2-factor auth. Making a payment with a NFC 'tap to pay' card is 1 factor auth.
*Waits for Jake's downvote*