I cant understand, in bitcoin i have 1 address and 1 privatekey, iota has like 1 private key and infinite address? How i can know if this adreess in mine or not?
With IOTA you have your seed, which is all you need to access your funds. The seed should be 81 characters long, only A-Z and 9 allowed.
With the addresses I already posted something earlier today:
You can receive multiple times on an address as long as you don't send anything. If you are unsure, just generate/attach a new address for receiving.
Meaning, when you send IOTA, you HAVE to generate/attach a new address for receiving IOTA, you shouldn't use the old (receiving) addresses any more.
For some further reading you can visit this site:
https://matthewwinstonjohnson.gitbooks.io/iota-guide-and-faq/getting-started/dl-wallet/what-is-my-seed.htmlI thing is, i was just trying to send IOTA to bitfinex, i didnt receive nothing is this adress for months.