Possible change my private key for seed phrase?

[Z x]

I have one Ledger device, I want to input the private key not the phrase, is there a way to store the private key in the Ledger? I prefer to have a specific public address rather than a random one by phrase.


Thank you =

[Charles-Tim]

You can not import private key into any ledger nano wallet

With seed phrase, you will have easy backup. No need for address reuse. But if you still want to be using one address, you can. But reusing address make privacy not possible.

[BlackBoss_]

If you have a private key, you can import it to another wallet and get the public key and public receiving address but you can not get any seed phrase.

Depends on each wallet type, deterministic (seeded) wallets. From one seed phrase, you can get all private keys derived from it. If it is a hierarchical deterministic or HD wallet, you will get a master key from your seed phrase, from that you will get Master key, Child keys, Grandchild keys and so on.

The book Mastering Bitcoin can enlighten you more
Chapter 4: Keys, Addresses
Chapter 5: Wallets

[Charles-Tim]

Depends on each wallet type, deterministic (seeded) wallets. From one seed phrase, you can get all private keys derived from it. If it is a hierarchical deterministic or HD wallet, you will get a master key from your seed phrase, from that you will get Master key, Child keys, Grandchild keys and so on.

Each child key generate each address, nothing like grandchild keys.

[Dr.Bitcoin_Strange]

You can not import private key into any ledger nano wallet

OP, just as Charles-Tim has said, you can't import a private key to the Ledger Nano S wallet. It is a feature that has never been enabled since the launch of Ledger Wallet but might be allowed in the near future. To know why it is not allowed, you can read here.

[BlackBoss_]

Each child key generate each address, nothing like grandchild keys.

Are you sure?

HD Wallets (BIP-32/BIP-44)
From a single seed, you will get a master key then a lot of child keys and more grandchild keys. It does not stop at grandchild keys and the tree structure will continue to expand to infinite depth.

With each key, you will get a public key and a public address.

Each subset of grandchild keys belongs to a branch of child key and it is advantage of HD wallets.

[mk4]

Just a heads up: only import wallets that have been generated through a hardware wallet. If you generated a wallet using a computer/mobile phone, importing it to a hardware wallet defeats the purpose of a hardware wallet because the wallet's keys might've already been leaked in the first place.

[Z x]

Just a heads up: only import wallets that have been generated through a hardware wallet. If you generated a wallet using a computer/mobile phone, importing it to a hardware wallet defeats the purpose of a hardware wallet because the wallet's keys might've already been leaked in the first place.

I don't get it for leak things, does vanity is not safe? there is more than safe with phrase ?

[mk4]

I don't get it for leak things, does vanity is not safe? there is more than safe with phrase ?

If you have a wallet with a vanity address, chances are, you created that wallet through a computer device. And unless you generated that wallet on a device that you're quite sure is air-gapped(running a Linux OS, etc), I'd deem that wallet unsecure.

[Z x]

I don't get it for leak things, does vanity is not safe? there is more than safe with phrase ?

If you have a wallet with a vanity address, chances are, you created that wallet through a computer device. And unless you generated that wallet on a device that you're quite sure is air-gapped(running a Linux OS, etc), I'd deem that wallet unsecure.

Then how to get private key with secure way?

[Charles-Tim]

Each subset of grandchild keys belongs to a branch of child key and it is advantage of HD wallets.

Practically and how HD wallet generates bitcoin addresses:

The seed phrase which is 12 to 24 words, it generates the seed
The seed generates the master keys
The master keys generate the child keys
Each child keys generate their corresponding addresses

That book you pasted its link, read it to the end to understand better, do not read only just its beginning.

Then how to get private key with secure way?

You have a hardware wallet, it can generate seed phrase for you.

[mk4]

Then how to get private key with secure way?

Generate the wallet through the hardware wallet; that's one of the main reasons why you purchase a hardware wallet in the first place — so you can generate wallets in a secure manner because the private keys never leave the hardware wallet device itself.

[Z x]

Then how to get private key with secure way?

Generate the wallet through the hardware wallet; that's one of the main reasons why you purchase a hardware wallet in the first place — so you can generate wallets in a secure manner because the private keys never leave the hardware wallet device itself.

I am not know many about security or such program. how to proved the hardware is safe? 'cause I bought them from 3rd party. 

[BlackBoss_]

Practically and how HD wallet generates bitcoin addresses:

The seed phrase which is 12 to 24 words, it generates the seed
The seed generates the master keys
The master keys generate the child keys
Each child keys generate their corresponding addresses

What are grandchild keys and lower hierarchical keys for?

Are they useless and can not create addresses?

Grandchild keys generate grandchild public keys and addresses.
Grand grandchild keys generate grand grandchild public keys and addresses.

I understand like this.

https://learnmeabitcoin.com/technical/hd-wallets

From a child private key, you can derive extended public keys or derive grandchild private keys and get grandchild extended public keys.

[Charles-Tim]

I am not know many about security or such program. how to proved the hardware is safe? 'cause I bought them from 3rd party. 

This should be helpful:

https://support.ledger.com/hc/en-us/articles/4404389367057-Is-my-Ledger-device-genuine-?docs=true

1. Set up your Ledger device with Ledger Live to verify its authenticity.
2. Genuine Ledger devices hold a secret key that is set during manufacture.
3. Only a genuine Ledger device can use its key to provide the cryptographic proof required to pass the genuineness check issued by Ledger Live.

Know that this is not about your seed phrase that you will generate yourself

[mk4]

I am not know many about security or such program. how to proved the hardware is safe? 'cause I bought them from 3rd party.  

Why did you purchase hardware wallet in the first place if you're not convinced that it's secure?

And you shouldn't even be buying from 3rd parties in the first place.

[DdmrDdmr]

<…>

Besides following what’s mentioned in the link provided by Charles-Tim, you may also consider resetting the device to factory settings to get a clean start, as described in the following link:

https://support.ledger.com/hc/en-us/articles/360017582434-Reset-to-factory-settings-

The procedure, if carried out properly, will leave the device clean, ready for its first use. Obviously, don’t perform it as is, if you’ve already moved any crypto of yours onto the device itself.
 
Remember though that the most important thing to do is to make sure that you yourself select the pin code, and that recovery phrase is provided by the device itself after performing the reset, phrase that you need to write down and store safely.

Note: The classical scam consists in providing a user a device alongsidea pre-filled 24 word seed (i.e. printed or hand-written on the recovery sheet) and/or pin not of your own choosing. Moving any crypto on to the device under these circumstances, will result in the seller having access to it (say good riddance to it then).

[dkbit98]

I have one Ledger device, I want to input the private key not the phrase, is there a way to store the private key in the Ledger? I prefer to have a specific public address rather than a random one by phrase.

No you can't do that with hardware wallets, but you can generate seed phrase offline and import it in your ledger wallet, that way you don't have to trust device generating anything.
Note that private keys or seed phrases should never be generated online, and you can just send coins from your old address to new one.

I don't get it for leak things, does vanity is not safe? there is more than safe with phrase ?

Can you translate this in english language?
Both seed phrase and private keys can be safe or unsafe, depending only on you and if you are doing things correctly or not,

I am not know many about security or such program. how to proved the hardware is safe? 'cause I bought them from 3rd party. 

You can verify if your device is genuine by following instructions on ledger website, but it should be fine if device was new and unopened.
It's better to buy from official store or resellers, but you can always reset device and check inside for potential malicious changes.
https://support.ledger.com/hc/en-us/articles/4404389367057-Is-my-Ledger-device-genuine-?docs=true