user20836: I have seen many videos about paper wallets and different ways to store BTC. And I have choose to store using a cold wallet (paper wallet). But I am not sure what option I should choose: a normal BIP38 encrypted paper wallet, or a brain wallet printed in paper.
And plz tell me the differens with BIP38 and brain wallet.Thanks for your answer :D
P.S: Which one is securest?

user18196: Brain wallets use your secret phrase to deterministically generate keys for you, meaning that you can never lose your wallet and there is no need to print it (except for extra-safe keeping). Hence the name, "brain" wallet (not paper wallet). But they have the downside that human chosen, and memorable, passphrases are usually easier to break. So in this sense, brain wallets are likely not as secure.
BIP38 wallets are password encrypted private keys stored on paper, and you can store the secret random password in a separate place. You can also do multisig with these wallets, I believe, so this has the potential to be much more secure. For example, if you made a 2 of 3 multisig address that you could send funds to, then even if an attacker got ahold of one key somehow, they still wouldn't be able to spend your funds. 
Thus, you can see here the age-old compromise between convenience and security. Brain wallets are more convenient, but BIP38 paper wallets are more secure. 

user91566: BIP38 allows you to hide your private key in plain sight.  Nobody knows what the private key is until they decrypt it with the password.
A brainwallet is essentially generating a private key by hashing a password or passphrase.
You can generate a private key using random or pseudorandom sources, or you can hash a password or passphrase.  You can then, if you choose, create a paper wallet from that key, and conceal the key with a BIP38 password.
You could conceivably generate a brainwallet and print it out with BIP38 concealment.  The caveat is that BIP38 will not protect a private key that was generated with a weak password/passphrase, regardless of how strong the BIP38 password is.  BIP38 only protects the paper wallet from prying eyes.  If someone already knows what the private key is, BIP38 provides no protection.

user13440: BIP38 wallets are significantly more secure and are resistant to brute-force attacks when a decent passphrase is used.
Generally the term "Brain Wallet" refers to one in which the private key is derived from a phrase you make up.  These have been shown to be insecure because humans are bad at entropy and generally anything easy enough to remember is not safe.
Note: modern BIP39 wallets will generate a 12, 18 or 24 word "seed" phrase from which unlimited keys can be derived.  These may look like a brain wallet, but are completely safe as long as they were created securely. Remembering these words can be challenging though, so generally better to write them somewhere and store securely.

20836: <p>I have seen many videos about paper wallets and different ways to store BTC. And I have choose to store using a cold wallet (paper wallet). But I am not sure what option I should choose: a normal BIP38 encrypted paper wallet, or a brain wallet printed in paper.</p>

<p>And plz tell me the differens with BIP38 and brain wallet.Thanks for your answer :D</p>

<p>P.S: Which one is securest?</p>
 18196: <p>Brain wallets use your secret phrase to deterministically generate keys for you, meaning that you can never lose your wallet and there is no need to print it (except for extra-safe keeping). Hence the name, "brain" wallet (not paper wallet). But they have the downside that human chosen, and memorable, passphrases are usually easier to break. So in this sense, brain wallets are likely not as secure.</p>

<p>BIP38 wallets are password encrypted private keys stored on paper, and you can store the secret random password in a separate place. You can also do multisig with these wallets, I believe, so this has the potential to be much more secure. For example, if you made a 2 of 3 multisig address that you could send funds to, then even if an attacker got ahold of one key somehow, they still wouldn't be able to spend your funds. </p>

<p>Thus, you can see here the age-old compromise between <strong>convenience and security</strong>. Brain wallets are more convenient, but BIP38 paper wallets are more secure. </p>
 91566: <p>BIP38 allows you to hide your private key in plain sight.  Nobody knows what the private key is until they decrypt it with the password.</p>

<p>A brainwallet is essentially generating a private key by hashing a password or passphrase.</p>

<p>You can generate a private key using random or pseudorandom sources, or you can hash a password or passphrase.  You can then, if you choose, create a paper wallet from that key, and conceal the key with a BIP38 password.</p>

<p>You could conceivably generate a brainwallet and print it out with BIP38 concealment.  The caveat is that BIP38 will not protect a private key that was generated with a weak password/passphrase, regardless of how strong the BIP38 password is.  BIP38 only protects the paper wallet from prying eyes.  If someone already knows what the private key is, BIP38 provides no protection.</p>
 13440: <p>BIP38 wallets are significantly more secure and are resistant to brute-force attacks when a decent passphrase is used.</p>

<p>Generally the term "Brain Wallet" refers to one in which the private key is derived from a phrase you make up.  These have been shown to be <a href="http://insecurety.net/?p=866" rel="nofollow noreferrer">insecure</a> because humans are bad at entropy and generally anything easy enough to remember is <a href="http://www.reddit.com/r/Bitcoin/comments/1ptuf3/" rel="nofollow noreferrer">not safe</a>.</p>

<p>Note: modern BIP39 wallets will generate a 12, 18 or 24 word "seed" phrase from which unlimited keys can be derived.  These may <strong>look</strong> like a brain wallet, but are completely safe as long as they were created securely. Remembering these words can be challenging though, so generally better to write them somewhere and store securely.</p>
