Ethereum Account Keystore File

This section describes the keystore file that contains the private key of an Ethereum account.

An Ethereum account keystore file is JSON file, that stores the private key of an Ethereum account.

We can use the importRawKey() function on the "geth" JavaScript console to create keystore file from a private key:

> web3.personal.importRawKey(


Then view the keystore file content with the Windows "type" command:

C:\> type \herong\Ethereum\personal\keystore

    "address": "63fac9201494f0bd17b9892b9fae4d52fe3bd377",
    "crypto": {
        "cipher": "aes-128-ctr",
        "ciphertext": "c38f1ae59809b13397737fc4e434fe3d8816c44fd35c2393222823ec1d5600e7",
        "cipherparams": {
            "iv": "019ea1f28718220e6157f58532a552e9"
        "kdf": "scrypt",
        "kdfparams": {
            "dklen": 32,
            "n": 262144,
            "p": 1,
            "r": 8,
            "salt": "100afc291aa2eb640f2ff20ca63a11e9ec6474fb59a195d615c5dfd614e5a541"
        "mac": "b418a27158f3735fd01c92e30ec397f10f3f9b3059792a6600a5b13e56408f74"
    "id": "bf502d65-3d11-461f-905d-6f532c626520",
    "version": 3

Note that the above keystore file has been reformatted.

As you can see, the private key has been encrypted by the password and stored to the "ciphertext" property. The public key is stored as the "addres" property.

Please do not send any Ether to this public key, since the private key is published, anyone can use it to spend the Ether fund associated to this public key.

Last update: 2018.

Table of Contents

 About This Book

 Introduction of Ethereum

 Ethereum Blockchain

 Ethereum Mist Wallet

 geth - Go Ethereum

 Testnet - Ropsten network

 Private Ethereum Network

 64-Bit "geth" for Private Ethereum Network

 Private Network with Custom Genesis Block

 Transferring Funds between Ether Accounts

 MetaMask - Browser Based Ethereum Wallet

Managing Ethereum Account

 What Is Ethereum Account

 Generate New Ethereum Accounts

 Ethereum Public Key and Private Key Example

Ethereum Account Keystore File

 "geth" Commands for Ethereum Accounts - Mining Ether with Browser


 PDF Printing Version