### By Mezijar - 21.03.2020

## Btc address to public key

It is impossible to compute the public key of an address, as the address is computed from the hash of the public key. You can retrieve the public key from address. show-tovar.ru › software › other-software › bitcoin-public-private-keys.

In the previous articlewe looked at different methods to generate a private btc address to public key. What we want to do is to apply a series of conversions to the private key to get a public key and then a wallet address.

### Latest Private Key Searches

Most of these conversions are called hash functions. Btc address to public key, we will look at how using these functions in the correct order can lead you to the Bitcoin wallet address that you can use.

There is a whole family of such curves that are widely known and used. Bitcoin uses the secpk1 curve. This consists of two byte integers that represent the X and Https://show-tovar.ru/address/your-bitcoin-address.html of the point on the elliptic curve, btc address to public key together.

## Technical background of version 1 Bitcoin addresses

For our example, we got: 1e7bcc70cdbb72feae8a6d07fd2ebe4de9ae3f7af75bfa7b73ffca6b0ccbbdda0eadd7.

This is relevant more to the Python and less to the algorithm itself, but I will explain what are we doing here to remove possible confusion.

The first is a string and the second is a byte array.

How to findee private key bitcoin with balance 2020Btc address to public btc address to public key result is a Bitcoin full public key, which is equal to: e7bcc70cdbb72feae8a6d07fd2ebe4de9ae3f7af75bfa7b73ffca6b0ccbbdda0eadd7 for us. Compressed public key But we can do better.

As you might remember, the public key is some point X, Y on the curve. We know the curve, and for each X there are only two Ys that define the point which lies on that curve.

So why keep Y? Later, we can derive Y from that if needed. Now, we add the 0x02 if the last byte of Y is even, and the byte 0x03 if the last byte is odd. In our case, the last byte is odd, so we add 0x03 to get btc address to public key compressed public key: e7bcc70cdbb72feae8a6d07fd2ebe4de9ae3f7af75bfa7.

Previously, wallet software used long, full versions of public keys, but now btc address to public key of it has switched to compressed keys.

Encrypting the public key From now on, we need to make a wallet address.

## Public and private keys

Whatever method of getting the public key you choose, it goes through the same procedure. Obviously, the addresses will differ.

In this article, we will go with the compressed version. The order is important.

What matters is that now we have bit integer, which will be used for further modifications.

## Mastering Bitcoin, 2nd Edition by Andreas M. Antonopoulos

For our example, the encrypted public key is abb8d73dac84d7e8b. The main network is the network that all people use to transfer the coins.

The test network btc address to public btc address to public key created — you guessed it — to test new features and software. We want to generate an address to use it on the mainnet, so we need to add 0x00 bytes to the encrypted public key.

### Private and Public Keys

The result is abb8d73dac84d7e8b. For the testnet, that would be 0x6f bytes. Checksum Now we need to calculate the checksum of our click btc address to public key see more key. The wallet software should look btc address to public key the checksum and mark the address as invalid if the checksum mismatches.

## Mastering Bitcoin by

To calculate the checksum of the key, we need to apply Btc address to public key twice and then take first 4 bytes of the result. For our example, the double SHA is f43ca75e58a7ec4cecd1a8fcbabf39c5c6b and therefore the checksum is f43c4 note that 4 bytes is 8 hex digits.

That makes it abb8d73dac84d7e8bf43c4 for our example. But you may notice that something is off.

Well, the reason is that btc address to public key are encoded with Base Depending on the form of public key full or compressedwe get different addresses, but both are perfectly valid.

I am making a course on cryptocurrencies here on freeCodeCamp News.

### What is a Bitcoin public key?

The first part is a detailed description of the blockchain. I also post random thoughts about crypto on Btc address to public key you might want to check it out.

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