Questions tagged [cold-storage]

Creating and storing a reserve of Ether offline so that it is more secure. Usually this means the keys are generated on a device that has never / will never connect to the Internet and is done to avoid malware, nefarious wallet-generation websites, hackers, or keyloggers. This is also referred to as "offline wallets" or a "cold wallet."

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How to import Txhashes to ETH cold wallet?

I would like to import Txhashes to my cold ETH wallet. The tx's are done on a connected device and transferred securely via QR codes. I can do this with BTC in Electrum but have found no way of doing ...
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Ethereum paper wallet address generator with ability to upload your own graphic to give as gifts

I'm looking to give eth to friends and family for christmas this year. But I wanted to upload my own background image if possible to an Ethereum paper wallet generator. Is there such a thing? I don't ...
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Minimal wallet application for a cold storage

I wonder if there are some convenient set of tools (or a wallet application itself) to work on a cold storage. As I can understand (correct me if I'm wrong) to work with a cold storage I only need to ...
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Set up a passwordless Ethereum address

I want to generate an Ethereum wallet to use for cold storage. I'll split the key using SSSS, and print the different parts in papers that I'll store in different places. I don't want to use a ...
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Safe way to generate and store Ether on multiple paper wallets

I have a certain amount x of Ether in my wallet on my PC. Now I want to divide this amount x by 30, and print each x/30th of my Ether on a separate paper. So, basically, I'd just like to have 30 bills ...
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Will this work and be truly cold: Offline cold storage using Bootable USB

I want to generate a cold wallet very securely without having to buy a new computer that will always be offline and while I am waiting for a hardware wallet on back order. Please validate and/or ...
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641 views

Can I reuse a signed transaction generated offline by MyEtherWallet?

I generated a signed transaction using MyEtherWallet on an air-gapped computer, and used it to successfully send a transaction. Does anything prevent the signed transaction from being reused?
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How to sign a transaction on an offline computer?

Short version: Is there a way to sign a transaction on an offline-computer using only official or widely trusted tools? Long version of this question: There are several posts on how to do that but ...
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Ethereum from cold wallet, how?

I moved my Ethereum out of my coinbase account and to a cold wallet/address. My question is, how do I get it out of cold storage so I can trade with someone?
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How to sign offline with geth?

I have installed geth on an offline-computer and created a account with ./geth account new. Than I have copied (USB-Stick) the resulting file from the offline-computers keystore/ to an online-computer,...
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Cold Storage after a Hard Fork?

If you create a cold storage account, by following the method described here for example: How to send ether to a cold storage account? And subsequently, a hard fork takes place on the Ethereum ...
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Can I use the same private key for Ethereum and Bitcoin?

Both Bitcoin and Ethereum private keys are usually a 256-bit number, isn't it possible to use the same private key for both Bitcoin wallets and Ethereum accounts? For instance, the Bitcoin wiki ...
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How to verify a paper wallet is working without compromising the private key?

MyEtherWallet tells the user: You need to back up your private keys externally and verify you can access the wallets. I am wondering, how do you verify you can access the accounts without ...
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How do exchanges work with Ethereum?

I'm about to create an exchange and I want to trade ether on it. But I'm quite confused of how to handle my clients' wallets. I see that some exchanges like Poloniex receive the ether in my deposit ...
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Secure paper wallet creation for ETH using JS

I am about to start the process of transferring my ETH to paper wallets for safe keeping. Currently the funds are stored on an online exchange. History shows that this is a very bad idea. It is not ...
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Generating ethereum address from private key on Ubuntu 32 bit

I have a securely generated private key that I want to use to generate an ethereum address on an offline PC (Ubuntu 32 bit). My preferred way would be to use geth, but there's no geth binary for linux ...
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Error creating Transaction with pyethereum: Can only serialize integers [closed]

I'm following the instructions found here to create an offline Transaction. When executing, the following line, I get "Can only serialize integers" exception raised by rlp. I did import pdb;pdb.pm() ...
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Is Trezor compatible with Ethereum

Can I use the Trezor hardware wallet for cold storage of ETH?
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Is there a way to transfer my ETH from a cold storage to a hot storage without compromising it?

At first I wanted to use myetherwallet.com but now I am afraid the code may be hacked / corrupted some day. The cold storage solution seems safer to store ETH in the long run. While I understand how ...
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1answer
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Risk assessment - account confidentiality when signing transactions

When creating cold storage setups, I've seen various users describe running a private Ethereum chain for the purpose of confirming access to their generated accounts. I'd like to verify access to ...
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Is there any hardware wallet available for Ethereum?

What are the various available hardware wallets for Ethereum?
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Possible to sign offline transactions with Geth? [duplicate]

I'd like to set up a cold storage wallet that has the ability to create and sign transactions offline. It seems both Icebox and ethkey has this functionality, but I'd prefer to have the option to ...
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2answers
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Can I recover an account with just the Private key (no json file) [duplicate]

I have read a few things lately That in order to securely store an account, one should save the json file and private key. I'm wondering If the json file is really needed though. Say I were to lose ...
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762 views

How can I generate a cold wallet completely offline WITH a random number seeded by me?

Requirements: 1) An account created on a raspberry pi that has never been connected to the internet ever. 2) A great private key on this account, that does not rely on any random number generator. 3) ...
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How to create a “cold wallet” and is it really necessary? [duplicate]

What's up everyone. I have a decent amount of Ether and I want to protect it as much as possible. I read that basically the only way someone could hack an ETH account would be with a keylogger program....
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What is the recommended way to safely store Ether?

There are several options for storing Ether : Accounts Mist/Geth accounts. Paper wallets. Icebox Air gapped offline signing of transactions Wallet Mist Multi-signature. In short there are a lot ...
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Is there any safe way to send money from a cold wallet, using an untrusted computer?

You have 2 computers. One is 100% offline and, thus, trusted. Other is online. Private keys are stored on the offline computer and the online computer has no access to it. Is there any way to sign a ...
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1answer
898 views

Is it possible to *write* (not print) a paper wallet without having to copy a big JSON?

In Bitcoin, you can store a paper wallet by merely writing down the private key of an address, which is very small. You can also write ~20 words generated from that address, if you want. In Ethereum, ...
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3k views

How to send ether to a cold storage account?

Is it possible to do the following: Back up the keystore on a usb drive. Format the computer used to generate the keystore. Send ether to a public address in the keystore. Reinstall geth (or other ...
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37k views

Is there a way to generate ethereum paper wallets?

Is it possible to store ether on paper wallets or generate printable private keys offline somehow?