Replying to Avatar bootlace

more random thoughts:

I have this public/private Bitcoin keypair (for this address: bc1qrkr240mwcyjzd3acsqxw02jtqrlyrse4akm6st):

public: 03283df9d2b84c48cbd922eabafb7f2d263bfc27626665bb324444eef5c48eef0d

private: L53cfm29BCDeahiLRJqMiJTUa41U8MBYfPV1gQp7N7TBy5N4gsE6

How can someone encrypt something to that public key, so that (only) I can decrypt it? Are there tools for that?

Please output in a format that I can just copy and paste into an https://primal.net reply text box.

from Perplexity.ai:

To encrypt a message using your Bitcoin public key so that only you can decrypt it with your private key, you can use a method called Elliptic Curve Integrated Encryption Scheme (ECIES). Here's a general process and some tools you can use:

1. Encryption process:

- The sender uses your public key to generate a shared secret

- This shared secret is used to derive a symmetric encryption key

- The message is encrypted using the symmetric key

- The encrypted message is sent along with some additional data for decryption

2. Decryption process:

- You use your private key to regenerate the shared secret

- You derive the same symmetric key

- You decrypt the message using this key

Tools you can use:

1. eccrypto (Node.js library):

This library provides ECIES functionality for Bitcoin keys[2].

```javascript

const eccrypto = require("eccrypto");

const publicKeyBuffer = Buffer.from("03283df9d2b84c48cbd922eabafb7f2d263bfc27626665bb324444eef5c48eef0d", "hex");

eccrypto.encrypt(publicKeyBuffer, Buffer.from("Secret message")).then(function(encrypted) {

console.log("Encrypted message:", encrypted);

});

```

2. Crypto-JS (JavaScript library):

While not specifically designed for Bitcoin keys, it can be adapted for ECIES with some additional code[3].

3. OpenSSL (Command-line tool):

OpenSSL can be used for ECIES, but requires some setup and is more complex to use[3].

4. Online tools:

Be cautious with online tools, especially when dealing with sensitive data. However, for educational purposes or non-sensitive information, you can use tools like the RSA Encryption Decryption & Key Generator Tool[6].

Remember, while these methods allow for encryption using a Bitcoin public key, they are not part of the Bitcoin protocol itself. Always ensure you're using secure, well-vetted tools and methods when dealing with sensitive information.

Citations:

[1] https://fortris.com/blog/public-key-cryptography

[2] https://bitcoin.stackexchange.com/questions/80638/how-would-one-encrypt-a-message-using-a-bitcoin-public-key-and-use-its-priva

[3] https://github.com/spatie/crypto

[4] https://iancoleman.io/bitcoin-key-compression/

[5] https://bitcointalk.org/index.php?topic=5484502.0

[6] https://www.devglan.com/online-tools/rsa-encryption-decryption

[7] https://crypto.mste.illinois.edu/encryption

[8] https://play.google.com/store/apps/details?id=com.kokoschka.michael.crypto&hl=en_US

last one

what do you think of this dumb idea?:

bip85 can be used to create an essentially infinite number of hierarchical deterministic of extremely strong passwords that you can recreate from your seed phrase.

if this is your seed phrase:

gorilla source travel angle wasp modify endless tumble follow anger camp stereo

your first password (BIP85 Index 0) would be:

cannon rally gift invite boil sort around illness amused engage shift useful

Index 1 would be:

onion have orient stamp swarm learn text city taste oil cash frost

and so on

from Perplexity.ia (shucks):

Your idea of using BIP85 to generate hierarchical deterministic passwords from a seed phrase is actually quite clever, not dumb at all. Here's an analysis of this approach:

Pros:

1. Security: Passwords derived this way are extremely strong and random.

2. Recoverability: You only need to remember one seed phrase to recreate all your passwords.

3. Hierarchical: The index system allows for organized password management.

4. Infinite passwords: You can generate as many unique passwords as needed.

5. Offline generation: Passwords can be created without internet connection, enhancing security.

Cons:

1. Seed phrase vulnerability: If the master seed is compromised, all derived passwords are at risk.

2. Complexity: It might be challenging for non-technical users to implement.

3. Tool dependency: Requires specific software to generate passwords from the seed.

4. Potential overuse: Users might be tempted to use the same seed for too many services.

Overall, this method provides a robust, recoverable password system. However, it's crucial to keep the master seed extremely secure and use it responsibly. It's an interesting application of cryptocurrency technology to general security practices.

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Discussion

final last one

one could protect the root seed phrase by using BIP85 Index 0 as the new root seed phrase for the password-generating project, and then use that to generate a new stack of BIP85 passphrases

password project root seed phrase (from earlier):

cannon rally gift invite boil sort around illness amused engage shift useful

keep that separate from your root seed phrase.

make "cannon rally..." the new root BIP39 mnemonic, then

BIP85 Index 0 is

slim tray nasty rapid cement boring mandate hotel record box omit way

BIP85 Index 1 is

rose nurse fog wing donor decorate appear hat alter dwarf spirit shed

If you use

https://github.com/iancoleman/bip39/releases/download/0.5.4/bip39-standalone.html

(offline, verified)

then you also get qr codes, which might come in handy.

Your beneficiaries might get confused on which 12-word phrase is a wallet and which is a password, but oh well, they'll figure it out. 😉