Well, I've observed the a site or sites that accept bitcoin are able to tell if I send bit coins again..
Lets take an example of a dice betting site
1st roll: I specify a receiving address where I will receive the WON amount of bit coins
then they give me an address 1 to send bit coins to , I send it, then lets say I win - it sends the WON amount to the address I specific above
2nd roll: I reset everything ,meaning I specify a different RECEIVING address for the WON number of bit coins
they give me ANOTHER ADDRESS DIFFERENT FROM ADDRESS 1(lets call it address 2)
I send bit coins to address 2 and when I win it, I get paid in the 2nd different address which I specified in the 2nd ROLL
Now, what I noticed is,
the betting site knows I am the same person who rolled 1st and 2nd time - even though everything was different!
Which leads me to conclude that, there must be some sending address (just like your own paypal email you use to send $$$) - which must be how they know that this is the same person who rolled first and the second time.
SO the question - HOW CAN I CHANGE THE SENDING ADDRESS OF MY WALLET every time I bet(if thats possible)?
I use electrum and multi bit