You need only a device with the internet and a valid bitcoin address string. The private key is kept secret and is used to sign a digital transaction to make sure the origin of the transaction is legitimate.
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So your public key is your address.
How to check bitcoin public key. Bitcoins protocol uses whats called the elliptic curve digital signature algorithm ecdsa to create a new set of private key and ! corresponding public key. This causes some confusion as some people assume that a bitcoin wallet address and the public key are the same. Check bitcoin address balance tool.
To elaborate a public key is 33 bytes long whereas an address is a 20 byte hash of the public key. That is not the case but they are mathematically related. Fyi if a public key is invalid you cant send funds there the software wont allow it miners wont allow it and since it would be yours and there would be a valid address for that private key you could regenerate the address to get the right one.
You send and recieve crypto on the same public facing keyaddress public key is your address question 2. Because the information is smaller therefore it is impossible to compute the correct public key from an address. A bitcoin wallet address is a hashed version of your public key.
If i bought btc in coinbase and i transfer the bitcoin into anoth! er wallet 1 transaction in this transaction from coinbase to m! y wallet there will be a pair of public and private key generated i will get the private key form the wallet to. If you dont back up your private key and you lose it you can no longer access your bitcoin wallet to spend funds. As mentioned there is also a public key.
Bitref will help you view the current balance of any bitcoin address. The public key is then used with a hash function to create the public address that bitcoin users use to send and receive funds.
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