The longer the passphrase with combinations of different characters, the harder it would become to brute force.

Some people leave little amount of bitcoin there in case there is a need to use it to deceive someone like an armed thief. I leave no coins there.

It is money, we should not think it can not happen.

You can backup the passphrase separate from the seed phrase in different locations and also have duplicates in different locations. Just make sure you did not backup both together and I do not think there would be any problem.

Some people can also memorize both which can be the last resort. But memory is not what should be relied on but just in case. It can be the 3rd or 4th backup. It should not be the primary backup but as last resort.

This is not only about the seed phrase but also the wallet file if someone has access to this wallet without the seed phrase they can brute-force this wallet. So if you have a short one they can easily brute-force the wallet but if you have a long passphrase brute-forcing the wallet takes years or decade or forever depends on how hard your passphrase is.


Why not teach them instead I prefer a hardware wallet in this case because they can easily learn how to use it and it is safe from brute-force attacks because the wallet is generated offline. You should have a backup seed phrase, including your long passphrase, saved offline in a safe place, and tell your kids about it with some instructions on how to use it so that if you die, they will know how to use it.

Op from my own little knowledge use of a long seedphase mean it can't be easily hacked by attackers to break most at time using an simple password or short phase can give an dictionary attacker easier access but using longer phase make it more harder to break through, what you should understand is that the complex and longer the seedphase the harder it easier get access to by attackers Many people have fallen into this trape and it has lost them there wallet been hack all in the name of I don't like using long password or seedphase. most people like to use personals information to create passcodes this can lead to a ease attack.

My layman understanding is that, just like with your passwords, the longer and more complicated they are the harder for anybody to guess them, with or without the help of a machine. So, that's basically for the sake of security.

It may not necessarily be a fake wallet. Perhaps you just need to keep your funds in different wallets. That's also for your funds' security. Should you fall victim to a robbery, God forbid, you can surrender the wallet with the smallest amount of savings.

As far as the standard of living in my country is concerned, I guess a few hundred dollars will do. That should be enough for the robber to believe that's all you've got in crypto.

The main thing is that if someone finds a 24 words seed, and tested it and it fails, they will probably assume there is a passphrase as well.

So, you have all the time in the world to generate multiple passphrases and see if one actually unlocks your wallet.

If the passphrase is strong, then this would be pretty much impossible.

If the passphrase is weak, then this would be done in seconds.

as from my understanding it's long to both lessen the chance of finding duplicate with the words combination and also to prevent brute force as other have already described above, it's long enough to make such attempt futile and it's long for security reason and I think whether it's gonna be 12 words or 24 words, user experience wise, won't make difference since people always write down their seed phrase and stash it somewhere else anyway, I think nobody is trying to remember seed phrase in their head. even if at some point in post quantum era we will be having more than 256 words combination I won't mind .

You do not need long seed phrase. Wallets are generating at least 12 words seed phrase but which is enough and secure. anything less than that are not secure but I have not seen a wallet generating less than 12 words seed phrase. As for passphrase, I like it to be long like up to 30 characters.

The seed is different from the seed phrase but some wallet like Electrum calls the seed phrase the seed. No wallet shows you the seed. All of them show you the seed phrase.

Also know that the password is not necessary at all. The thief can access your coins through the seed phrase and password is not needed.

You need to learn the difference between seed phrase and passphrase. They are not the same. Seed phrase is the 12 to 24 words that the wallet will generate you when creating a wallet. The passphrase is the extra word that you input yourself if you want it. The passphrase will generate different keys and addresses for you. So if someone know your seed phrase without the passphrase, the person will not have access to your coins.

I you complicate things too much, you will possibly have big troubles later.

12 mnemonic words or 24 mnemonic words are safe enough in security by entropy. By adding passphrase like word, you will create a different tree of keys compare to a wallet with same mnemonic words without a passphrase.

It's secured enough with one or two words in your passphrase, and honestly, using too long passphrase like 12 or 24 words are not recommended if you meant long passphrase is such.

Wallet seeds and Recovery codes.

Thank you very much for the link