Questions tagged [coldstorage]

Storing a wallet offline, i.e. making the private keys inaccessible from the web. This is e.g. implemented through use of Paper and Hardware Wallets.

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Offline Paper Wallet Creation

I was wanting create an offline Paper Wallet, ideally, without using a computer for nothing more that verification. So, that's how I came across Entropy. What is the risk of attempting to create a ...
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How does a completely offline wallet "registers" and runs

A wallet which was made offline and will never ever see the internet how is it "registered" and runs in the blockchain. Is it through the watch-only wallet?
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Why do I need to download the entire blockchain for a wallet when I can make one one with open source java like bitaddress.org

Like title said. And when i will have to use the btc I can login the wallet with the private key on a hot wallet.
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Bitcoin Core missing public key when generating PSBT transaction

I use Bitcoin Core for offline signing. I created a legacy watch-only wallet, imported a public key using importpubkey, then called rescanblockchain, then generated a psbt transaction text(psbt_tx_txt)...
MonKong's user avatar
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why is BIP 39 unanimously discouraged for implementation and what should I do about that

Let's say I come new to the space and I find these three facts: Everybody advice against hot wallets unless loose change, telling to use cold storage instead. Every cold storage device seems to be ...
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suspicious transaction from a cold wallet to cold wallet [duplicate]

Dears, Please help me to understand what happened with a bct transaction I made from one cold wallet address to another. In short: I transferred the correct amount in the receiving address and when I ...
user144163's user avatar
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what is the best way to store btc for long-term?

I am looking for a way to store btc for long-term. Have been using airgapped hw wallet but I want to get rid of third party risk at all. I do not want to use mnemonic anymore as I found that BIP39 is ...
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Is it possible to sign a transaction programmatically via a connected cold storage wallet?

Lets say I want to generate my own transactions and sign them myself via my computer. Signing them in the computer would require me to input my private key, which would compromise the key. Is it ...
Trevor Wood's user avatar
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What needs to be on a USB such that you could hand it to someone and gift them a discrete amount

This may be a very stupid question. I was watching an interview with Nic Carter (https://youtu.be/mDyBbGCiBUU?t=1094). In it he gives Lex a present of a USB with $100 worth of Bitcoin. What is ...
Mark's user avatar
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what is actually stored on a hardware wallet?

My understanding is that: Your crypto is on the public ledger under a public key. Your Hardware Wallet stores your private key (which is used to prove your ownership of the public key/wallet). You ...
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Create a .psbt using the BitcoinCore client

I am trying to create a .psbt using BitcoinCore on mainnet. The use-case is that I want to be able to export the unsigned transaction, import it into my cold-storage wallet (using BitcoinCore) and ...
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How to Properly Use a Hardware Wallet and Recover My Coins if I Forget it Somwhere?

A noob in the bitcoin world, and trying to get in by diversifying some of my assets into bitcoin. My apologies if the question sounds too ignorant or basic. I was just watching this video for ...
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what is flow of a bitcoin transfer from one exchange to another?

Can someone please share what exactly is flow involved in transfer of a bitcoin from my account on one exchange to someone else's on another exchange? for example: is there a transfer from my account (...
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Is it secure to generate a new address using SBC such as raspberry pi? any problem with TRNG?

I am trying to create a cold wallet using SBC such as raspberry pi (not raspberry pi). I wonder if the random generator is secure enough to generate random wallet address, for both BTC and ETH. I ...
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Is it possible that malicious bitcoin wallet providers provide pre-generated private-keys for users?

We trust wallets like Ledger, Trezor, and etc. We believe the math that the randomly generated private keys are safe. But could it be possible that the private keys you thought are “generated” are ...
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Safest way of long term holding

I am considering holding Bitcoin for the long term. I have learned a few basics about the blockchain and BTC mechanisms, but still unable to find a complete guide on how to safely store bitcoin. How ...
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How to create a signed transaction offline using electrum?

I remember that on Electrum, it used to have a Preview button inside the Send tab. By clicking the Preview button I could export the unsigned transaction, and then sign it. I cannot find this button ...
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Why does all cold/offline storage setup require three steps?

I was reading about cold/offline storage and from what I have seen all clients seem to work the same. Requiring you to create the transaction on the online computer, getting it to the offline computer ...
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Is there a way to tell that our bitcoin is safe after we put it in a hardware wallet for cold storage after 3 or 5 years?

If I consolidated 1 bitcoin into an address using a hardware wallet, and put it in cold storage. Can I know after 3 to 5 years that the bitcoin is safe? So far the research I have is: can I go to ...
nonopolarity's user avatar
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How long can popular hardware wallets last in cold storage?

Consider the Ledger and Trezor hardware wallets: how long could they last in a typical bank safety deposit box? If the answer needs specifics, assume the following: Temp: 20C Humidity: 50% RH ...
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"Hot", "Cold" & "Warm" Storage Wallets? [duplicate]

I've seen a number of sites advertise they support "hot", "warm" and "cold" wallet storage solutions (the only thing I haven't seen so far are "frozen" wallets)....
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Are Hardware Wallets (i.e, Ledger Nano X) Safer than Software-Based Cold Storage Wallets?

I'm looking into purchasing Ledger Nano X as a cold storage hardware solution. What benefits does Nano X (or other hardware wallets) provide over software based cold storage solutions? Why not install ...
S.O.S's user avatar
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How do exchanges automate transfer of Bitcoin from a cold storage wallet?

Most exchanges use Cold Storage to store the bulk (approx. 95%) of their user assets. Only a relatively small amount (approx. 5%) of funds are held in their Hot Wallet. My question is, what process is ...
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Is my cold wallet still cold?

I created a new wallet.dat on a dedicated, secured machine with Bitcoin Core. Then I encrypted it. Then I sent my "fortune" of coins to it. Then I backed the file up by putting it on all my ...
T Kalpakoff's user avatar
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Should I be using the "encrypt wallet" feature in Bitcoin Core?

All my wallet.dats have no password. However, the internal hard disk where the "live" one is located is encrypted, and so are the offline storage devices where I have my "cold" ...
G Havili's user avatar
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What is the best way to generate bitcoin wallet?

I am trying to create a cold storage, and I'm becoming so paranoid about everything on software and hardware (also afraid of myself forgetting/losing the wallet) related to the setup. I have read some ...
bbnn's user avatar
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Is there anything wrong using a cold wallet from BitKey in watch-only mode on my normal desktop Electrum?

I followed the instruction for cold-offline in BitKey and created my cold wallet on a USB key with BitKey burned and booted from a CD-ROM. I noted the encryption password and the seed phrase on a ...
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Question: Docker alternative to Tails OS for generating Bitcoin addresses securely for cold storage

I am exploring options to generate Bitcoin private keys and addresses in most secure ways, using Ian Coleman's BIP39 tool. https://iancoleman.io/bip39/ The most recommended OS seems to be Tails OS for ...
John Smith's user avatar
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Security of online Electrum wallet after deleting wallet file

I just created an Electrum wallet using my computer which is connected to the Internet. Suppose I send my bitcoin from an online exchange to that wallet, then delete the wallet file. Are there any ...
Betterthan Kwora's user avatar
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How does a hardware wallet interact with the bitcoin network?

I tried to understand the principle how the hardware wallet sends transactions to another Bitcoin address since it is not connected via full node to the blockchain. I found this answer: How do ...
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How to generate a very secure wallet with Electrum?

For a poor-mans glacier protocol, looking for: One private key – an alphanumeric string used to secure the funds The cold storage address – an alphanumeric string designating the virtual “location” of ...
Nicholas Saunders's user avatar
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Starting bitcoind for the express purpose of creating a wallet?

Referencing this solution: My favorite method: grab out a old/unused pc/mac install a linux over usb (maybe Talis) (make sure your USB stick is clean!) download a recent version of bitcoin-core (...
Nicholas Saunders's user avatar
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What needs to be written down for a paper wallet?

I'm installing bitcoin-core with snap on Ubuntu for a dry-run at generating a paper wallet. Perhaps naively, I thought to "write down" something like: nicholas@mordor:~/bitcoin$ nicholas@...
Nicholas Saunders's user avatar
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Are all 'metal wallets' functionally equivalent?

Within the context of wallets, is it correct that a metal bitcoin wallet needs to store both public and private keys? I'm looking at some metal wallets and want to clarify that the're all basically ...
Nicholas Saunders's user avatar
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Re: Old bitcoin address fro BCH and BSV claiming

I have a BTC address from 2013 when I bought my BTC, it is a paper wallet (the BTC have been moved), but I want to claim my BCH and BSV (Is this correct I can also claim BSV?) and move it to my trezor....
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Why hasn't cold storage (offline signing) been supported by Bitcoin Core (GUI) up till now (0.19.0.1)?

Is there any deep reason not to support this? Or is this merely a "good idea, but no volunteers" situation? By the way, although Bitcoin Core had supported BIP32 several years ago, it uses hardened ...
Chris Chen's user avatar
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2 answers
2k views

How to send bitcoin from an offline Bitcoin Core that doesn't have a synced balance?

I am setting up a cold wallet. How can I generate a signed raw transaction from bitcoin core wallet that controls some bitcoins? PS: I generated the wallet using getnewaddress in console from the ...
bbnn's user avatar
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How can I turn off sending of bitcoins?

I use Bitcoin Core v.0.17 on the server. I want to only be able to receive, and prevent sending. How can I turn off sending of bitcoins through bitcoind, bitcoin-cli or bitcoin.conf?
voodooSHA A's user avatar
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how to get bitcoin off an exchange?

As a corollary to asking how to transfer from cold storage, how is bitcoin first put into a paper, or other wallet, when it originates on an exchange? My primary concern is more getting the coins out ...
Thufir's user avatar
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do i get a new private key for every transaction that I transfer to my cold storage

If I buy crypto in little bits at a time and I transfer to the cold storage wallet every time I buy some, would a get different private keys for each transfer? how to keep track of all those keys? ...
ERosen's user avatar
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How does Sentinel check Blockchain?

I've been very happy to hodl my Bitcoin on a paper wallet (coinglacier.org) and using Sentinel to view the balance of my addresses (using extended public key). Sentinel is an awesome app, it provides ...
Dalit Sairio's user avatar
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What really happen when user moves fund between Main Account and Trading Account in HitBTC?

I am building a crypto exchange and I wonder how HitBTC exchange (https://hitbtc.com/) is handling "Main account" and "Trading account", as the image below: According to them, Main Account is like ...
thomasdao's user avatar
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What kinds of wallets are there?

Can I get short a explanation about cryptocurrency cold/hot wallets? Are there more kinds?
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Signing a bitcoin transaction OFFLINE fails

I know this subject has been discussed quite a lot, but after several days looking for this to work, I give up. I want to create a transaction on a view-only wallet which is connected to the internet ...
bitcoinmonkey's user avatar
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What they stored in cold wallet? All bitcoins anyone owned is already in blockchain

I just want to understand what actually they store in the cold wallet because all bitcoins anyone owned is already in the blockchain. Do they store the private key of users in cold wallet?
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Best OS for cold storage

I want an OS which can be easily disconnected from all hard drives (just uses USB) and can be booted from usb stick, also secure enough and disconnected from internet by default (or something I can ...
Pouya Esmaili's user avatar
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Can the Large Bitcoin Collider project 'break' into offline hardware wallets like the Nano Ledger S?

Let's say the Large Bitcoin Collider manages to guess the private key of a particular Nano Ledger S. Can they then 'spend' or 'steal' the Bitcoins on the Nano or 'send' them to another wallet?
DCH's user avatar
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Generating additional change addresses manually in Electrum

So I have an offline wallet created with Electrum. When signing transactions on the cold storage machine, I would like to be able to check that the address I'm sending the change to is actually a ...
mxbi's user avatar
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Transactions for multiple crypto-currency coins in cold storage without downloading full block-chains

I've searched on the internet and still unable to understand the usage of cold storage. Actually, I want to buy a few types of low price crypto currency coins and save them in my personal devices or ...
Simptive's user avatar
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How do exchanges use cold bitcoin wallet while still able to automate transfers?

Some exchanges mentions they use a cold wallet to keep the private key. As far as I understand cold wallet is a wallet either in an offline machine or kept in hardware. However, it appears that ...
Calvin Lau's user avatar