BTC key summary

1. In order to make it easier for new people to understand, sister coin will use some metaphors. Although she is not strict, she will understand better
the private key is like your bank card password
the address of bitcoin wallet is like your bank card
as long as you have the bank card and password, anyone can withdraw money from ATM
the address of bitcoin wallet is public, which means that everyone else has your bank card, so your bank card password (private key) becomes very important at this time
once your key is disclosed, others can transfer your bitcoin

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2. The private key is a confidential block of data that, through an encrypted signature, proves that you have the right to spend bitcoin from a specific bitcoin address. Each bitcoin address has its own unique private key. If you are using wallet software, your private key is stored in your computer; If you are using an online wallet, your private key is stored on a remote server; The private key can't be disclosed, because with it, you can spend the bitcoin in its corresponding bitcoin address--- Token network forum.

3. API keys are used to program transactions. One time password, with Google verifier. Download Google verifier to your mobile phone and install it. Scan the two-dimensional code with a verifier to get a one-time password. studybtc

4. This is the order of importance: BTC private key, wallet security password, BTC address
the private key is everything and must not be told to anyone
as long as there is a private key, you can re import the wallet and reset the wallet security password
a BTC account can have many addresses, so the least important one is the address. No matter how unimportant, you can't just tell others.

5. Bitcoin private key is a 256 bit random number generated by SHA-256 algorithm

6.

There is no limit on the total amount of use, but there is a limit in theory. It depends on the number of public key digits. A simple high school permutation can calculate the number (an astronomical number); A public key is a very good random number generator. Under the restriction of long enough public key, it is impossible to have plicate public key in theory

the following is the calculation comparison of different length keys in intercepted professional books

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8. Bitcoin trading website only gives you the right to use, not ownership. You're just a bitcoin tenant at the exchange. If you want to be the owner of bitcoin, please use bitcoin wallet (I use Bitai wallet)