In the context of Bitcoin and cryptocurrency, an #XFP (Extended Fingerprint) refers to a unique identifier associated with a master extended key (also known as an extended public key or xpub) in hierarchical deterministic (HD) wallets. HD wallets generate a tree-like structure of keys, where the master extended key is the root from which all other keys are derived.

Here's a technical summary of XFP:

1. **Purpose**: The XFP provides a shorthand way to identify an extended key without revealing the key itself. It's used to verify that two different #xpubs belong to the same master key.

2. **Structure**: The XFP is a 32-bit identifier (4 bytes) derived from the master extended key using a hash function. Specifically, it's the first 4 bytes of the hash160 (RIPEMD-160 after SHA-256) of the master extended key.

3. **Calculation**:

- Take the extended key (xpub).

- Perform SHA-256 hashing on the extended key.

- Perform RIPEMD-160 hashing on the SHA-256 hash.

- Take the first 4 bytes of the resulting RIPEMD-160 hash. This 4-byte value is the XFP.

4. **Use Cases**:

- **Wallet Verification**: Helps ensure that different xpubs are derived from the same master key without exposing the master key.

- **Interoperability**: When sharing xpubs between different software, the XFP helps ensure the correct xpub is used and matches the expected master key.

5. **Display**: Often displayed in hexadecimal format, making it #human-readable for comparison purposes.

### Example Workflow:

1. **Generate Master Extended Key (xpub)**:

- `xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKpSfey2Fv46ZoK4mKaZyCB1m9VZzmTmDBTjXbFQfz6hvWrTT4dE8YWbaqfPr5c5gZKUp7mW5Rhtq3`

2. **Compute SHA-256**:

- `SHA-256(xpub) = 9b...9c` (64-character hexadecimal string)

3. **Compute RIPEMD-160**:

- `RIPEMD-160(SHA-256(xpub)) = 50fc...d3d` (40-character hexadecimal string)

4. **Extract XFP**:

- First 4 bytes of `RIPEMD-160` hash: `50fc1234`

5. **Result**:

- XFP (Extended Fingerprint) = `50fc1234`

In summary, the XFP serves as a compact identifier for extended keys in HD wallets, enhancing security and #interoperability without revealing #sensitiveinformation #plebchain

An extended #fingerprint (XFP) is kind of a unique ID for a special type of key used in #Bitcoin. Here's a breakdown:

* Regular fingerprints are used to identify people. Imagine it like a nickname for your fingerprint.

* In bitcoin, an XFP is a nickname for a key used to generate other keys for your #wallet. It's like a master key, but not the actual key itself.

Think of it like a super secure lockbox. The XFP is the label on the box, but it doesn't tell you the combination. It just helps identify which box you need to open.

Here's why it's useful:

* It helps verify that you're using the right key for a #transaction.

* It can be used with multiple wallets to make sure they're all connected to the same master key.

#plebchain

On a cold card when you enter a pass phrase, it will change the fingerprint of the wallet if you’ve saved that fingerprint value which I believe is a eight digit hex characters you should be able to recover if you have that

This hash is likely wrong but I’ll take it. It’s not about the sats so much but it’s nice to see. Yes I know it’s not exactly contributing towards “decentralized” mining. Fun little toy. #plebchain #nerdaxe

With the pass phrase fingerprint maybe

Hash hash baby #nerdaxe #bitaxe #braiins

It doesn’t like #braiins pool will try #ocean #nerdaxe

Nice build

#nerdaxe #bitaxe #plebchain 💪🏼

I'm stealing this idea!

#breedlove A short story:

Robert nostr:npub15vzuezfxscdamew8rwakl5u5hdxw5mh47huxgq4jf879e6cvugsqjck4um had a whirlwind romance with Janet that began in late 2017. Their relationship took an unexpected turn when Janet became pregnant after three months of dating, despite using birth control. The pregnancy was unplanned, and the couple decided to stay together and prepare for their new arrival. However, their relationship faced many challenges, and by August 2018, while Janet was still pregnant, they parted ways.

Their daughter, Penny, was born in November 2018. Despite their separation, Robert and Janet attempted to co-parent amicably. This arrangement became more structured during the COVID-19 pandemic when they lived under the same roof from March 2020 until February 2023, not as a couple but as dedicated co-parents to Penny.

In early 2023, Janet secured a place for Penny at a prestigious private school in Nashville, with Robert contributing to the expenses. However, their already strained relationship took a severe hit when, in February 2023, Janet took Penny on a "three-month vacation" to Hawaii without Robert's consent. Janet had borrowed money from Robert for this trip under false pretenses, effectively deceiving him. This event led to a long and painful separation between Robert and Penny, lasting 124 days.

During this period, Robert fought tirelessly to see his daughter again, resorting to legal action against Janet. Finally, in June 2023, a court-ordered visitation allowed Robert and Penny to reunite. Their reunion was emotional, and they hugged for several minutes, cherishing the moment after being apart for so long.

Despite this, Janet refused to repay the money she borrowed for the Hawaii trip and continued to cause disruptions. She disenrolled Penny from the private school in July 2023, just a month before the new school year was set to begin. Throughout these challenges, Robert remained Penny's sole financial provider, paying child support despite not being legally mandated to do so.

Janet's actions extended beyond financial strain. She spread false claims about her financial situation and misrepresented their relationship on social media, posting professional photos that gave the illusion of a happy, nuclear family. Robert repeatedly asked her to stop, but Janet persisted, perpetuating the false narrative.

Meanwhile, Robert found new love with Laryn. After dating for a year, they planned to get married and start a family together, embracing a future filled with hope and harmony.

In his message to the world, Robert stressed the importance of respecting the complexities of relationships and the people involved. He expressed his unwavering love and commitment to Penny, promising to always be there for her, no matter what challenges they faced. #plebchain

Thought this fucker would clear this weekend at 6s /vb #consolidate

A reminder:

Great minds discuss ideas; average minds discuss events; small minds discuss people.

#plebchain

Let’s get back on track on what’s important.

Bitcoin #silentpayments are a privacy-enhancing feature that allows users to make transactions without revealing their transaction history or patterns to outside observers. Here's a step-by-step explanation of how silent payments work:

1. **Public Key Generation**: The recipient generates a so-called silent payment address and makes it publicly known⁴.

2. **Shared Secret Derivation**: The sender takes a public key from one of their chosen inputs for the payment, and uses it to derive a shared secret. This is done using the same cryptography as stealth addresses and BIP 47, known as Elliptic Curve Diffie-Hellman (ECDH)³.

3. **Address Tweaking**: The sender tweaks the silent payment address using the shared secret. This process involves cryptographic operations that alter the public key to create a new, unique address for the transaction⁵.

4. **Transaction Execution**: The sender then makes a payment to the tweaked address. The transaction looks like any other on the blockchain, maintaining the sender's privacy¹.

5. **Payment Detection**: The recipient scans the blockchain for transactions to their tweaked addresses. Since they know the shared secret, they can identify which transactions are meant for them⁴.

6. **Privacy Preservation**: Silent payments do not increase the size or cost of transactions. They blend in with other Bitcoin #transactions and cannot be distinguished by an outside observer. There is no interaction required between the sender and receiver during the transaction¹.

The characteristics of #silent payments include:

- No increase in the size or cost of transactions.

- Transactions blend in with other Bitcoin transactions and can't be distinguished.

- Transactions can't be linked to a silent payment address by an outside observer.

- No sender-receiver interaction is required¹.

This method helps to #preserve financial privacy by preventing address re-use and making it difficult for chain analysis firms to track transaction patterns. It's a significant step towards enhancing user privacy in Bitcoin transactions.

### Mechanics of Silent Payments

1. **Address Generation**: The recipient generates a Silent Payment address, which is a public key that can be shared publicly.

2. **Payment Process**: The sender uses one of their public keys to derive a shared secret with the recipient's Silent Payment address. This shared secret is used to tweak the recipient's address, creating a unique address for the transaction.

3. **Blockchain Scanning**: The recipient scans the blockchain for transactions that match the tweaked address. This allows them to detect and access the payment without revealing their identity to outside observers.

4. **Enhanced Privacy**: By using Silent Payments, users can avoid the privacy issues associated with reusing Bitcoin addresses, such as making it easy for others to track their transactions and balances.

#plebchain

This folks, is real POW! We need to get this maxi over here #plebchain #mounteverest

Maintained by mostly Monero folks

ouch

try perplexity

This is pretty good #plebchain sats back

https://app.thebitcoincompany.com/signup?ref=UAJPEX