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[bit] max⚡️
aa8de34ff8b18ac3cc56decdfe56f17ec3007385993c834c9b99c839a6ffe696
entrepreneur . bitcoin advocate . data scientist and cybersecurity analyst, auditor and researcher #codeislaw #decentralize #ruleswithoutrulers

Bitcoin steht vor einer problematischen Änderung – und kaum jemand redet offen darüber.

Der Vorschlag mit dem harmlos klingenden Titel „Relax OP_RETURN standardness restrictions“

https://groups.google.com/g/bitcoindev/c/d6ZO7gXGYbQ?pli=1

bedeutet im Klartext:

Bitcoin Core-Entwickler wollen es einfacher machen, mehr Daten in Bitcoin-Transaktionen einzubetten. Das öffnet Tür und Tor für Spam.

Aktuell schützt das Bitcoin-Netzwerk sich halbwegs dagegen: Es gibt Filter, die versuchen, unnötige Datenflut zu blockieren – ein ständiger Kampf zwischen Spammern und Entwicklern. Doch jetzt schlagen einige vor, diese Filter zu lockern oder ganz abzuschaffen.

Das Problem?

Spammer könnten günstig riesige Mengen Müll-Daten auf alle Bitcoin-Nutzer abladen.

Der Speicherbedarf wächst – für alle.

Die Änderungen würden eingeführt, ohne Nutzern eine Möglichkeit zum Ablehnen zu geben.

Einige der Unterstützer haben finanzielle Verbindungen zu Projekten, die genau von dieser Spam-Öffnung profitieren würden.

Manche Entwickler verteidigen das mit dem Argument, die Filter seien ohnehin wirkungslos – was seltsam klingt, wenn sie gleichzeitig so dringend entfernt werden sollen.

Fazit:

Dieser Vorschlag wirkt harmlos, ist aber hochpolitisch. Wer Bitcoin langfristig dezentral und nutzerfreundlich halten will, sollte sehr genau hinsehen, wem diese Änderung wirklich nützt – und wer am Ende die Rechnung zahlt.

Use #knots - Bitcore Core devs are getting more and more "coreupted".

"Bitcoin Core developers are about to merge

a change that turns Bitcoin into a worthless altcoin, and no one seems to care to do anything about it.

I've voiced objections, lost sleep over this, and despite clear community rejection of the PR it's moving."

Source

https://fixupx.com/wk057/status/1917235710781690171

Orange Pill and thrive ...

Bitcoin Lightning Nodes

¡Número 4 y 5 en #Conil de la Frontera! ¿Qué pasa en #Cádiz? 😎😇⚡️

https://btcmap.org/map#17/36.27784/-6.08599

Choose wisely ... #taxslave

I would guess the second but both things are in the nature of decentralized systems and not only distributed ones.

There is always are prize to pay and you have to value it yourself.

BITCOIN 101 - One Pager

Big Bitcoin Book - A Visual Chronicle of Bitcoin's First 15 Years

https://bigbitcoinbook.com/

https://entropy.page/ - what a collection!

bitcoin workshops, projects, tools, hackathons, and software

Saving #Satoshi

Explore the mysteries of Satoshi and learn about bitcoin along the way.

https://savingsatoshi.com/

Summary of what is ecash and discussion of Stackers:

https://stacker.news/items/793450

The Depth of the Bitcoin Rabbit Hole: From Hand Shovels to Excavators

https://stacker.news/items/825723

Interactive tutorial for beginners who want to learn more about the technical side of Bitcoin

https://trybitcoin.satsie.dev/

The Ultimate Bitcoin Guide: Secure, Private, and Informed Usage

https://github.com/iAnonymous3000/awesome-bitcoin-guide

Bitcoin wasn’t the first attempt at a digital currency 🙂

https://m.primal.net/Pqfk.webp

Replying to Avatar [bit] max⚡️

19\. März 2025

### 🔐 1. SHA-256 is Quantum-Resistant

Bitcoin’s **proof-of-work** mechanism relies on SHA-256, a hashing algorithm. Even with a powerful quantum computer, **SHA-256 remains secure** because:

- Quantum computers excel at **factoring large numbers** (Shor’s Algorithm).

- However, **SHA-256 is a one-way function**, meaning there's no known quantum algorithm that can efficiently reverse it.

- **Grover’s Algorithm** (which theoretically speeds up brute force attacks) would still require **2¹²⁸ operations** to break SHA-256 – far beyond practical reach.

++++++++++++++++++++++++++++++++++++++++++++++++++

### 🔑 2. Public Key Vulnerability – But Only If You Reuse Addresses

Bitcoin uses **Elliptic Curve Digital Signature Algorithm (ECDSA)** to generate keys.

- A quantum computer could use **Shor’s Algorithm** to break **SECP256K1**, the curve Bitcoin uses.

- If you never reuse addresses, it is an additional security element

- 🔑 1. Bitcoin Addresses Are NOT Public Keys

Many people assume a **Bitcoin address** is the public key—**this is wrong**.

- When you **receive Bitcoin**, it is sent to a **hashed public key** (the Bitcoin address).

- The **actual public key is never exposed** because it is the Bitcoin Adress who addresses the Public Key which never reveals the creation of a public key by a spend

- Bitcoin uses **Pay-to-Public-Key-Hash (P2PKH)** or newer methods like **Pay-to-Witness-Public-Key-Hash (P2WPKH)**, which add extra layers of security.

### 🕵️♂️ 2.1 The Public Key Never Appears

- When you **send Bitcoin**, your wallet creates a **digital signature**.

- This signature uses the **private key** to **prove** ownership.

- The **Bitcoin address is revealed and creates the Public Key**

- The public key **remains hidden inside the Bitcoin script and Merkle tree**.

This means: ✔ **The public key is never exposed.** ✔ **Quantum attackers have nothing to target, attacking a Bitcoin Address is a zero value game.**

+++++++++++++++++++++++++++++++++++++++++++++++++

### 🔄 3. Bitcoin Can Upgrade

Even if quantum computers **eventually** become a real threat:

- Bitcoin developers can **upgrade to quantum-safe cryptography** (e.g., lattice-based cryptography or post-quantum signatures like Dilithium).

- Bitcoin’s decentralized nature ensures a network-wide **soft fork or hard fork** could transition to quantum-resistant keys.

++++++++++++++++++++++++++++++++++++++++++++++++++

### ⏳ 4. The 10-Minute Block Rule as a Security Feature

- Bitcoin’s network operates on a **10-minute block interval**, meaning:Even if an attacker had immense computational power (like a quantum computer), they could only attempt an attack **every 10 minutes**.Unlike traditional encryption, where a hacker could continuously brute-force keys, Bitcoin’s system **resets the challenge with every new block**.This **limits the window of opportunity** for quantum attacks.

---

### 🎯 5. Quantum Attack Needs to Solve a Block in Real-Time

- A quantum attacker **must solve the cryptographic puzzle (Proof of Work) in under 10 minutes**.

- The problem? **Any slight error changes the hash completely**, meaning:**If the quantum computer makes a mistake (even 0.0001% probability), the entire attack fails**.**Quantum decoherence** (loss of qubit stability) makes error correction a massive challenge.The computational cost of **recovering from an incorrect hash** is still incredibly high.

---

### ⚡ 6. Network Resilience – Even if a Block Is Hacked

- Even if a quantum computer **somehow** solved a block instantly:The network would **quickly recognize and reject invalid transactions**.Other miners would **continue mining** under normal cryptographic rules.**51% Attack?** The attacker would need to consistently beat the **entire Bitcoin network**, which is **not sustainable**.

---

### 🔄 7. The Logarithmic Difficulty Adjustment Neutralizes Threats

- Bitcoin adjusts mining difficulty every **2016 blocks (\~2 weeks)**.

- If quantum miners appeared and suddenly started solving blocks too quickly, **the difficulty would adjust upward**, making attacks significantly harder.

- This **self-correcting mechanism** ensures that even quantum computers wouldn't easily overpower the network.

---

### 🔥 Final Verdict: Quantum Computers Are Too Slow for Bitcoin

✔ **The 10-minute rule limits attack frequency** – quantum computers can’t keep up.

✔ **Any slight miscalculation ruins the attack**, resetting all progress.

✔ **Bitcoin’s difficulty adjustment would react, neutralizing quantum advantages**.

**Even if quantum computers reach their theoretical potential, Bitcoin’s game theory and design make it incredibly resistant.** 🚀

Overall very good summary and explanation why Bitcoin is already designed with resistance to attacks even of possible future Quantum Computers. Satoshi even explicitly mentioned this.

One weakness is point 5 which a common mistake to assume that there is a cryptographic puzzle to solve - it is not. It is a brute force approach to find a fitting hash with certain demand of leading zeros.Overall very good summary and explanation why Bitcoin is already designed with resistance to attacks even of possible future Quantum Computers. Satoshi even explicitly mentioned this.

One weakness is point 5 which a common mistake to assume that there is a cryptographic puzzle to solve - it is not. It is a brute force approach to find a fitting hash with certain demand of leading zeros.Overall very good summary and explanation why Bitcoin is already designed with resistance to attacks even of possible future Quantum Computers. Satoshi even explicitly mentioned this. One weakness is point 5 which a common mistake to assume that there is a cryptographic puzzle to solve - it is not. It is a brute force approach to find a fitting hash with certain demand of leading zeros.Overall very good summary and explanation why Bitcoin is already designed with resistance to attacks even of possible future Quantum Computers. Satoshi even explicitly mentioned this.\

One weakness is point 5 which a common mistake to assume that there is a cryptographic puzzle to solve **- it is not. It is a brute force approach to find a fitting hash with certain demand of leading zeros.**

Replying to Avatar [bit] max⚡️

19\. März 2025

### 🔐 1. SHA-256 is Quantum-Resistant

Bitcoin’s **proof-of-work** mechanism relies on SHA-256, a hashing algorithm. Even with a powerful quantum computer, **SHA-256 remains secure** because:

- Quantum computers excel at **factoring large numbers** (Shor’s Algorithm).

- However, **SHA-256 is a one-way function**, meaning there's no known quantum algorithm that can efficiently reverse it.

- **Grover’s Algorithm** (which theoretically speeds up brute force attacks) would still require **2¹²⁸ operations** to break SHA-256 – far beyond practical reach.

++++++++++++++++++++++++++++++++++++++++++++++++++

### 🔑 2. Public Key Vulnerability – But Only If You Reuse Addresses

Bitcoin uses **Elliptic Curve Digital Signature Algorithm (ECDSA)** to generate keys.

- A quantum computer could use **Shor’s Algorithm** to break **SECP256K1**, the curve Bitcoin uses.

- If you never reuse addresses, it is an additional security element

- 🔑 1. Bitcoin Addresses Are NOT Public Keys

Many people assume a **Bitcoin address** is the public key—**this is wrong**.

- When you **receive Bitcoin**, it is sent to a **hashed public key** (the Bitcoin address).

- The **actual public key is never exposed** because it is the Bitcoin Adress who addresses the Public Key which never reveals the creation of a public key by a spend

- Bitcoin uses **Pay-to-Public-Key-Hash (P2PKH)** or newer methods like **Pay-to-Witness-Public-Key-Hash (P2WPKH)**, which add extra layers of security.

### 🕵️♂️ 2.1 The Public Key Never Appears

- When you **send Bitcoin**, your wallet creates a **digital signature**.

- This signature uses the **private key** to **prove** ownership.

- The **Bitcoin address is revealed and creates the Public Key**

- The public key **remains hidden inside the Bitcoin script and Merkle tree**.

This means: ✔ **The public key is never exposed.** ✔ **Quantum attackers have nothing to target, attacking a Bitcoin Address is a zero value game.**

+++++++++++++++++++++++++++++++++++++++++++++++++

### 🔄 3. Bitcoin Can Upgrade

Even if quantum computers **eventually** become a real threat:

- Bitcoin developers can **upgrade to quantum-safe cryptography** (e.g., lattice-based cryptography or post-quantum signatures like Dilithium).

- Bitcoin’s decentralized nature ensures a network-wide **soft fork or hard fork** could transition to quantum-resistant keys.

++++++++++++++++++++++++++++++++++++++++++++++++++

### ⏳ 4. The 10-Minute Block Rule as a Security Feature

- Bitcoin’s network operates on a **10-minute block interval**, meaning:Even if an attacker had immense computational power (like a quantum computer), they could only attempt an attack **every 10 minutes**.Unlike traditional encryption, where a hacker could continuously brute-force keys, Bitcoin’s system **resets the challenge with every new block**.This **limits the window of opportunity** for quantum attacks.

---

### 🎯 5. Quantum Attack Needs to Solve a Block in Real-Time

- A quantum attacker **must solve the cryptographic puzzle (Proof of Work) in under 10 minutes**.

- The problem? **Any slight error changes the hash completely**, meaning:**If the quantum computer makes a mistake (even 0.0001% probability), the entire attack fails**.**Quantum decoherence** (loss of qubit stability) makes error correction a massive challenge.The computational cost of **recovering from an incorrect hash** is still incredibly high.

---

### ⚡ 6. Network Resilience – Even if a Block Is Hacked

- Even if a quantum computer **somehow** solved a block instantly:The network would **quickly recognize and reject invalid transactions**.Other miners would **continue mining** under normal cryptographic rules.**51% Attack?** The attacker would need to consistently beat the **entire Bitcoin network**, which is **not sustainable**.

---

### 🔄 7. The Logarithmic Difficulty Adjustment Neutralizes Threats

- Bitcoin adjusts mining difficulty every **2016 blocks (\~2 weeks)**.

- If quantum miners appeared and suddenly started solving blocks too quickly, **the difficulty would adjust upward**, making attacks significantly harder.

- This **self-correcting mechanism** ensures that even quantum computers wouldn't easily overpower the network.

---

### 🔥 Final Verdict: Quantum Computers Are Too Slow for Bitcoin

✔ **The 10-minute rule limits attack frequency** – quantum computers can’t keep up.

✔ **Any slight miscalculation ruins the attack**, resetting all progress.

✔ **Bitcoin’s difficulty adjustment would react, neutralizing quantum advantages**.

**Even if quantum computers reach their theoretical potential, Bitcoin’s game theory and design make it incredibly resistant.** 🚀

Overall very good summary and explanation why Bitcoin is already designed with resistance to attacks even of possible future Quantum Computers. Satoshi even explicitly mentioned this.

One weakness is point 5 which a common mistake to assume that there is a cryptographic puzzle to solve - it is not. It is a brute force approach to find a fitting hash with certain demand of leading zeros.Overall very good summary and explanation why Bitcoin is already designed with resistance to attacks even of possible future Quantum Computers. Satoshi even explicitly mentioned this.

One weakness is point 5 which a common mistake to assume that there is a cryptographic puzzle to solve - it is not. It is a brute force approach to find a fitting hash with certain demand of leading zeros.Overall very good summary and explanation why Bitcoin is already designed with resistance to attacks even of possible future Quantum Computers. Satoshi even explicitly mentioned this. One weakness is point 5 which a common mistake to assume that there is a cryptographic puzzle to solve - it is not. It is a brute force approach to find a fitting hash with certain demand of leading zeros.Overall very good summary and explanation why Bitcoin is already designed with resistance to attacks even of possible future Quantum Computers. Satoshi even explicitly mentioned this.\

One weakness is point 5 which a common mistake to assume that there is a cryptographic puzzle to solve **- it is not. It is a brute force approach to find a fitting hash with certain demand of leading zeros.**