Genenerate address offline, but blockchain knows about my address

2

I generate new address in client. I hear that blockchain doesn't know about it. Blockchain will know about it when I use this address for transaction.

My example: I generate this address(offline): 1J1JqUPqKq4XvrDRioMSMYKrwL3wKdJ1Fe I haven't used yet. How does website blockchain.info know about my address??? https://blockchain.info/address/1J1JqUPqKq4XvrDRioMSMYKrwL3wKdJ1Fe

user3473712

Posted 2014-05-02T17:26:20.867

Reputation: 375

Answers

6

It only knows anything about the address because you asked about it.

Since the address has never appeared in the blockchain, all it knows is what can be seen from the address: its hash160 value. This is the hexadecimal version of what is encoded in your address, which is a hash of your public key via the algorithm explained here.

Tim S.

Posted 2014-05-02T17:26:20.867

Reputation: 4 159

okey, but if I change last two letters in address: 1J1JqUPqKq4XvrDRioMSMYKrwL3wKdJ1Fe -> 1J1JqUPqKq4XvrDRioMSMYKrwL3wKdJ1eF . Blockchain.info doest't know about it, but it also address or not? – user3473712 – 2014-05-02T17:56:49.427

5An address includes a 32-bit checksum. If you carelessly change some portion of the address, the new address will most likely be invalid. Blockchain.info recognizes this and rejects it. – Tim S. – 2014-05-02T17:58:49.550

Asked: 2014-05-02T17:26:20.867

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Active: 2014-05-02T17:43:20.577