Unlike Bitcoin, which uses the blockchain architecture to make the register, iota uses "Tangle," which is a direct acyclic graphic known as DAG. It solves the scalability and transaction failures encountered Bitcoin asking the sender to perform some kind of proof of the operation of the transaction that supports two transactions. Thus, the act of verifying transactions and transactions is related. This eliminates selected miners and makes the system completely decentralized - those who commit the transaction (system users) are the only actors that can influence the system (while Bitcoin miners do not use the "system", and they simply let it run ).
The result is remarkable that IOTA's speeding transactions on network increases as the number of users increases (as opposed to blocking kriptovydeleniya, which slowed down with the increase in the number of users). This also eliminates the need for users to pay "miners" to prove their work (because they do it on their own). Thus, there is no payment for the transaction!