The four most famous international exchanges:

Binance INTL	OKX INTL	Gate.io INTL	Huobi INTL
China Line　APP DL	China Line　APP DL	China Line　APP DL	China Line　APP DL

Note: The above exchange logo is the official website registration link, and the text is the APP download link.

How to export or import the private key if the Bitcoin wallet client is encrypted? If a Bitcoin wallet wants to import and export private keys, it must be done by resetting the client. Currently this can only be achieved by adding parameters to the running program. So the first thing you should do after downloading the client is to give bitcoin-
Right-click qt.exe to create a shortcut. Then click Properties on the shortcut, and then add "
-datadir=your download path" parameter, remember there is a space in front of -.

If you unzip the installation package on drive E, prepare to put the download path in the Bitcoin directory of drive E. The target in the shortcut should be like this: E:bitcoin-0.8.3-win32bitcoin-
qt.exe -datadir=e:Bitcoin

OK, now you can run the Bitcoin client through this shortcut. You can put this shortcut on the desktop so that you don't confuse the shortcut with the original executable file. If you ever get confused and execute bitcoin without parameters-
qt.exe file, you will find that all transaction data needs to be re-downloaded, and the most critical thing is that the Bitcoins in your wallet are missing...

Bitcoin-qt client after encryption

If you need to export the private key corresponding to a certain address, you need to first call walletpassphrase password unlock duration (seconds), such as: walletpassphrase
h123456789*/* 120, please note that there are English spaces. phrase means a phrase. Then dumpprivkey address such as: dumpprivkey
15YtPkrChjpCWJX49saJLSJXyzoDnquOPW (33-digit public key, letters are case-sensitive, numbers are mixed)
You can get something like: L1ZHQoDroNSgusqdlopwmDYmM9oDSUBUSpA8hJfmEbqDibGoPiko
(52-bit private key, letters are case-sensitive, numbers are mixed)

Bitcoin-qt client has no encryption

If you need to export the private key corresponding to a certain address, just enter the dumpprivkey address directly in the RPC console.

Try a few addresses and you will know that the public key and private key are used in pairs. A public key corresponds to a private key.

Data is Bitcoin-
Before QT is sent out, two layers of encryption are required. The first layer is to randomly encrypt the data with a private key corresponding to a certain public key, and then send the public key in plain text to the payee. The payee uses this public key to open the data encrypted by the corresponding private key, thus ensuring that the data is sent by the payer.
The second layer is encrypted using the payee's public key (actually the 33-bit payment address). After this encryption, only the person who has the private key corresponding to the public key can receive the money.

Guess, the Bitcoin wallet file wallet.dat should contain a pair of public and private keys. There is a one-to-one correspondence between the public key and the private key.

In addition, perhaps for security reasons, Bitcoin-QT cannot remove the password after encrypting the wallet. If you want to remove the password, you can create a new wallet and import the private key into the new wallet.
Use the command: importprivkey private key. After the private key is imported, Bitcoin-
QT will automatically display the corresponding address (public key) in the "Receive" window. And if this address has a BTC balance, congratulations, other people's money will be yours. So do you know the importance of protecting the wallet file wallet.dat?

After encrypting the wallet, when sending (paying) BTC to others, you will be asked to enter the encryption password, which adds another layer of security.