Simple script collection, currently in bash and python format, to generate a complete offline Ethereum wallet by creating an ECDSA keypair and derive its Ethereum address.
@toddmo you can generate a valid xpub any way you like if you just want one for testing, it doesn't have to be the same one as the one in your wallet – MeshCollider ♦ Apr 24 '18 at 2:11 ok I put a lot of effort into editing my question and doing research, which provided an answer, which may not be the best. Fact: a Bitcoin wallet can handle multiple private keys. In ECC, you can have 2^256 private keys and, for each key, you can have 2^256 public keys. Assuming that's right (please correct me if I'm wrong), you generate a Bitcoin address basically by hashing a public key with a RIPEMD160 hash function, which can produce 2^160 different addresses. Mar 28, 2019 The public key is cryptographically connected to a cryptocurrency address in the sense that the address is a representation of the public key. It is often the case that the public key is used to generate an actual cryptocurrency address. This address serves as a user’s account identifier to which funds can be paid into. Oct 17, 2018 This article is to provide a guide on how to generate ECDSA private key, then derive to Ethereum wallet address by using PHP 7.0. The code requires PHP 7.0 with OpenSSL extension and PHP. Feb 12, 2015 As seen in our guides to elliptic curve cryptography and how to create a Bitcoin Private key – a public key is in fact just coordinates on the Bitcoin curve calculated through multiplying the generator point by the private key number. Generating a usable Ethereum wallet and its corresponding keys Contents. Generating the EC private key; Derive the Ethereum address from the public key; Importing the private key to geth; Complete example; This article is a guide on how to generate an ECDSA private key and derive its Ethereum address. Using OpenSSL and keccak-256sum from a terminal. Apr 30, 2017 Generate Ethereum address from private key. Contribute to yuanfeiz/simple-eth-addr-generator development by creating an account on GitHub.
You can read my article about it here: https://kobl.one/blog/create-full-ethereum-keypair-and-address/
IMPORTANT The python version of this script has been updated to support mixed-case checksum address encoding through EIP55.
Python dependencies
- ECDSA https://pypi.python.org/pypi/ecdsa
- pysha3 https://pypi.python.org/pypi/pysha3
You can also use the included requirements.txt file to install them
Generate Ethereum Address From Public Key Exchange
Bash dependencies
- OpenSSL
- SHA3sum (keccak-256sum) https://github.com/maandree/sha3sum
Compiled, statically linked versions of the keccak-256sum executable are available in the lib folder of this repo for i386 and x86_64.
Importing private key to geth
You can use the generated private key to import in to geth (https://github.com/ethereum/go-ethereum).
Note that geth will ask you immediately to choose a passphrase to protect the newly imported key.
Example
Secure wallet with mouse entropy!Generate Paper Wallet.comAvoid all cryptographic weakness!
Generate Ethereum Address From Public Key West
Get your paper wallet!
Move your mouse to generate randomness.0%done.
Ethereum private key & Receiving address
Keep your private key private & don't show it to anyone else!
Your private key will appear after sufficient mouse movement
Your receiving address will appear after sufficient mouse movement
Your private key encoded as wallet words
You will always be able to recover your private key with these words.
Your wallet words will appear after sufficient mouse movement
If you would like to decode your wallet words, enter them below, press decode, and the private key will appear above!
A private key represented as random words is safe. For a brute-force attacker such a private key is just as difficult to guess as the fully random 64 character ethereum private key. Also, words are much easier to write down or even remember. Though it's best to write them down or print them and put them in a safe place even if you have a great memory, just in case. Trusted bitcoin wallets such as the Electrum bitcoin client use wallet words as well.