<h1>Wallet</h1>

<p>The wallet holds the most valuable component of the bitcoin network, your <strong>private key</strong>.
When you go to <a href="https://www.bitcoin.org/" rel="noreferrer">Bitcoin.org</a>, there are several choices.
 A HD wallet (Hierarchical Deterministic) is more future proof.</p>

<pre><code>Wallet    Feature        Caveats                   Example
Mobile    Convenience    Trust?                    Mycelium
Online    Backing of co  Trust?                    Coinbase
Hardware  Self contained Update your own firmware  Trezor
Desktop   Total control  Your responsibility       Bitcoin Core
</code></pre>

<h1>Private Key</h1>

<p>In <a href="https://www.bitcoinbook.info/" rel="noreferrer"><em>Mastering Bitcoin</em></a>, the private key is compared to your PIN (while the bank account number would be your public key).
 For HD wallets, the private key is more specifically referred to as the seed or root seed.</p>

<p>Using the analogy, how do you protect your PIN? (considering it is 64 alphanumeric digits)</p>

<ol>
<li>Keep it safely stored separately as a back-up.</li>
<li>Never give it out. No one, no application will ask you for it.</li>
<li>Change it on a frequency (like the IT policy enforcement of office passwords). For your private key, you change it by using all the unspent value then starting a new paper wallet (see next section).</li>
<li>Don't lose it. This is where the analogy is weakest. You cannot call anyone to reset your private key. Don't lose it.</li>
</ol>

<h1>Paper Wallet</h1>

<p>To protect your private key, there is a way to ensure it isn't visible to the bitcoin network. This is accomplished by using a paper wallet. The paper wallet is like the hardware wallet at the extreme, with all the electronics removed. The recommended practice is to receive payments in one or more transactions, but spend in one single transaction and starting a new paper wallet.</p>

<p>The manual steps:</p>

<ol>
<li>Save the client-side javascript for Bitaddress onto USB drive</li>
<li>Disable network on your PC</li>
<li>Start a clean OS (Live CD of Linux)</li>
<li>Launch a web browser to run the page saved from step #1</li>
<li>Inspect the private key for a <strong>6P</strong> starting prefix value</li>
<li>Never forget the pass phrase you chose</li>
<li>Print the newly created paper wallet</li>
<li>Store the print-out in a real lock safe</li>
</ol>

<h1>Proactive</h1>

<p>Go to <a href="https://www.blockchain.info/" rel="noreferrer">Blockchain.info</a>, input your address, and check the activity. This is similar to how you might inspect your receipts from a store, scanning your monthly credit card statement, or balancing your checkbook. You are watching your financial accounts to catch mistakes, fraudulent activity, and dispute charges.</p>

CC BY-SA 3.0
2017-02-09T08:41:13.093Z
2017-02-10T05:52:22.667Z
2017-02-10T05:52:22.667Z
杜興怡
<p>I think this link here is useful: <a href="https://bitcoin.org/en/choose-your-wallet" rel="nofollow noreferrer">https://bitcoin.org/en/choose-your-wallet</a></p>

<p>It shows the bulk of wallets available and if you click on it, it shows a brief summary. </p>

<p>For a general basic user wanting to send and receive, I would think that all of those wallet options are about the same. Of course they all have slight differences that anyone can further research on.</p>

CC BY-SA 3.0
2017-01-15T21:12:00.167Z
2017-01-15T21:12:00.167Z
cloudnthings
<p>It is very important to secure and back up your bitcoin wallet. If you can’t follow this you could lose your bitcoin.Here are the eight easy to do tips to safeguard your bitcoins from losing or falling into the wrong hand: <a href="http://atozforex.com/news/how-to-keep-your-bitcoin-wallet-safe/" rel="nofollow noreferrer">Eight ways to keep your bitcoin safe from wrong hands</a></p>

CC BY-SA 3.0
2017-02-05T19:41:14.300Z
2017-02-05T19:41:14.300Z
Aman Sonewane
<p>Use a desktop or mobile wallet (Electrum or Mycelium) to spend bitcoins (be sure to write down your recovery seed and store it like a paper wallet). To receive and store them, use offline paper wallets. As soon as a paper wallet exceeds some amount (50mXBC for instance), put it in storage and start a new one. If you are spending and your online wallet runs dry, break open a paper wallet to complete the transaction, any leftover coins will remain on the online wallet.
NOTE: with "online wallet" I mean wallets like Electrum and Mycelium, <strong>not</strong> web wallets like Coinbase or the Blockchain.info wallet.
Someone posted instructions for paper wallets on bitcointalk:</p>

<p><a href="https://bitcointalk.org/index.php?topic=1559277.msg17075677#msg17075677" rel="noreferrer">https://bitcointalk.org/index.php?topic=1559277.msg17075677#msg17075677</a></p>

<p>Do your own research before risking your coins following what someone told you.</p>

<p>Do not use web wallets.</p>

<p>EDIT: Brain Wallets (memorizing a passphrase that is hashed to produce keys and addresses) are highly controversial in the bitcoin community. The proper way to use them is to choose the passphrase <strong>uniformly and at random</strong> from a large set (at least 2^128).
Security improvements include:
Adding salt (something unique but trivial to remember, like your full name, phone number, or email address) to the passphrase to prevent hackers from attacking everyone at once.
Using key stretching WarpWallet is an algorithm that derives keys from a passphrase using a difficult, memory-intensive algorithm, this makes them <em>much</em> harder to hack.</p>

<p>To generate multiple wallets from one passphrase, you can attach an index to it (append a number to the passphrase).</p>

<p>The main advantage of brain wallets is that there is no physical wallet to steal or confiscate, and plausible deniability of having bitcoin.
Disadvantages include difficulty of remembering the passphrase (if you forget it, the coins are gone), possibility of theft (there are hackers constantly monitoring addresses created from weak passphrases, and they steal coins immediately), and the fact that in the unfortunate event of your death, your family would not be able to recover your coins.
If you decide to use them, they can be used in place of the paper wallets in the first paragraph.</p>

CC BY-SA 3.0
2017-01-15T17:51:13.137Z
2017-02-07T17:29:47.723Z
2017-02-07T17:29:47.723Z
lmnopcdefg
<p>With the recent rally and media attention, lots of new people joining the Bitcoin community.</p>

<p>A lot are asking: </p>

<p><strong>I'm new to Bitcoin, how do I keep my bitcoins secure?</strong></p>

<p>and if they aren't that's the first thing you should teach them.</p>

<wallet-security><introducing-bitcoin>
I'm new to Bitcoin, how do I keep my bitcoins secure?
Murch
# I'm new to Bitcoin, how do I keep my bitcoins secure?

(Asked by: username_0 on 2017-01-14)

With the recent rally and media attention, lots of new people joining the Bitcoin community.

A lot are asking:

**I'm new to Bitcoin, how do I keep my bitcoins secure?**

and if they aren't that's the first thing you should teach them.

**Tags:** wallet-security, introducing-bitcoin


---

## 4 answers

### Answer by username_4 on 2017-01-15. Score: 5 | Accepted answer

Use a desktop or mobile wallet (Electrum or Mycelium) to spend bitcoins (be sure to write down your recovery seed and store it like a paper wallet). To receive and store them, use offline paper wallets. As soon as a paper wallet exceeds some amount (50mXBC for instance), put it in storage and start a new one. If you are spending and your online wallet runs dry, break open a paper wallet to complete the transaction, any leftover coins will remain on the online wallet.
NOTE: with "online wallet" I mean wallets like Electrum and Mycelium, **not** web wallets like Coinbase or the Blockchain.info wallet.
Someone posted instructions for paper wallets on bitcointalk:

<https://bitcointalk.org/index.php?topic=1559277.msg17075677#msg17075677>

Do your own research before risking your coins following what someone told you.

Do not use web wallets.

EDIT: Brain Wallets (memorizing a passphrase that is hashed to produce keys and addresses) are highly controversial in the bitcoin community. The proper way to use them is to choose the passphrase **uniformly and at random** from a large set (at least 2^128).
Security improvements include:
Adding salt (something unique but trivial to remember, like your full name, phone number, or email address) to the passphrase to prevent hackers from attacking everyone at once.
Using key stretching WarpWallet is an algorithm that derives keys from a passphrase using a difficult, memory-intensive algorithm, this makes them *much* harder to hack.

To generate multiple wallets from one passphrase, you can attach an index to it (append a number to the passphrase).

The main advantage of brain wallets is that there is no physical wallet to steal or confiscate, and plausible deniability of having bitcoin.
Disadvantages include difficulty of remembering the passphrase (if you forget it, the coins are gone), possibility of theft (there are hackers constantly monitoring addresses created from weak passphrases, and they steal coins immediately), and the fact that in the unfortunate event of your death, your family would not be able to recover your coins.
If you decide to use them, they can be used in place of the paper wallets in the first paragraph.


---

### Answer by username_1 on 2017-02-09. Score: 5

# Wallet

The wallet holds the most valuable component of the bitcoin network, your **private key**.
When you go to [Bitcoin.org](https://www.bitcoin.org/), there are several choices.
A HD wallet (Hierarchical Deterministic) is more future proof.

```
Wallet    Feature        Caveats                   Example
Mobile    Convenience    Trust?                    Mycelium
Online    Backing of co  Trust?                    Coinbase
Hardware  Self contained Update your own firmware  Trezor
Desktop   Total control  Your responsibility       Bitcoin Core

```

# Private Key

In [*Mastering Bitcoin*](https://www.bitcoinbook.info/), the private key is compared to your PIN (while the bank account number would be your public key).
For HD wallets, the private key is more specifically referred to as the seed or root seed.

Using the analogy, how do you protect your PIN? (considering it is 64 alphanumeric digits)

1. Keep it safely stored separately as a back-up.
2. Never give it out. No one, no application will ask you for it.
3. Change it on a frequency (like the IT policy enforcement of office passwords). For your private key, you change it by using all the unspent value then starting a new paper wallet (see next section).
4. Don't lose it. This is where the analogy is weakest. You cannot call anyone to reset your private key. Don't lose it.

# Paper Wallet

To protect your private key, there is a way to ensure it isn't visible to the bitcoin network. This is accomplished by using a paper wallet. The paper wallet is like the hardware wallet at the extreme, with all the electronics removed. The recommended practice is to receive payments in one or more transactions, but spend in one single transaction and starting a new paper wallet.

The manual steps:

1. Save the client-side javascript for Bitaddress onto USB drive
2. Disable network on your PC
3. Start a clean OS (Live CD of Linux)
4. Launch a web browser to run the page saved from step #1
5. Inspect the private key for a **6P** starting prefix value
6. Never forget the pass phrase you chose
7. Print the newly created paper wallet
8. Store the print-out in a real lock safe

# Proactive

Go to [Blockchain.info](https://www.blockchain.info/), input your address, and check the activity. This is similar to how you might inspect your receipts from a store, scanning your monthly credit card statement, or balancing your checkbook. You are watching your financial accounts to catch mistakes, fraudulent activity, and dispute charges.


---

### Answer by username_2 on 2017-01-15. Score: 1

I think this link here is useful: <https://bitcoin.org/en/choose-your-wallet>

It shows the bulk of wallets available and if you click on it, it shows a brief summary.

For a general basic user wanting to send and receive, I would think that all of those wallet options are about the same. Of course they all have slight differences that anyone can further research on.


---

### Answer by username_3 on 2017-02-05. Score: 0

It is very important to secure and back up your bitcoin wallet. If you can’t follow this you could lose your bitcoin.Here are the eight easy to do tips to safeguard your bitcoins from losing or falling into the wrong hand: [Eight ways to keep your bitcoin safe from wrong hands](http://atozforex.com/news/how-to-keep-your-bitcoin-wallet-safe/)


---

