Luke Childs lukechilds

8x Nvidia GTX 1080 Hashcat Benchmarks

Product: Sagitta Brutalis 1080 (PN S3480-GTX-1080-2697-128)

Software: Hashcat v3.00-beta-145-g069634a, Nvidia driver 367.18

Accelerator: 8x Nvidia GTX 1080 Founders Edition

Highlights

Bitcoin for laypeople

(Chinese version available here, courtesy of @jiangplus

(This is an English translation of my Danish blog post, Bitcoin for voksne)

Bitcoin is a digital currency that has no central authority. It's a currency where you do not have to rely on anyone to know it's worth it. As a concept, it's similar to gold. Gold has a value in itself, as opposed to, say a $100 note that only has value if the U.S. government says it has value. Similarly, the idea of Bitcoins is that they have value by themselves.

Let's try to understand how Bitcoin works.

This is a quick guide of the commands we use to sign someone's GPG key in a virtual key signing party.

Note: The steps cover only the technical aspects of signing someone's key. Before signing someone's key, you must verify their identity. This is usually done by showing government-issued ID and confirming the key's fingerprint

The commands will work for both GPG and GPG2.

I use Julian's key for the examples. His key id is 2AD3FAE3. You should substitute with the appropriate key id when running the commands.

Signing the key

List the keys currently in your keyring: gpg --list-keys.

WASM Rust to Node Example

Use only > 8.x.x NodeJS version

Install Rust before using this tutorial: curl https://sh.rustup.rs -sSf | sh

Create dirs:

mkdir wasmRustNodeExample

cd wasmRustNodeExample

Zoom Sucks

Zoom abuses the installer flow on MacOS to bypass permissions dialogs (source)
Zoom sends identifying device info to Facebook, even when users don't have a Facebook account (source) (fixed)
A bug in Zoom sent identifying information (including email addresses and profile pictures) of thousands of users to strangers (source)
Zoom claims that meetings are end-to-end encrypted in their white paper and marketing materials, but meetings are only encrypted in transit, and are available in plaintext to Zoom servers and employees. (source)
zoomAutenticationTool can be used to escalat

Reusable taproot addresses

Abstract

This document proposes a new scheme to avoid address reuse while retaining some of the convenience of address reuse, keeping recoverability purely from Bitcoin time chain and avoiding visible fingerprint. The scheme has negligible average overhead.

Motivation

zkCoins

Edit: here you can find our research paper describing the protocol more in-depth.

zkCoins is a novel blockchain design with strong privacy and scalability properties. It combines client-side validation with a zero-knowledge proof system. The chain is reduced to a minimum base layer to prevent double spending. Most of the verification complexity is moved off-chain and communicated directly between the individual sender and recipient of a transaction. There are very few global consensus rules, which makes block validation simple. Not even a global UTXO set is required.

In contrast to zk-rollups there is no data availability problem, and no sequencer is required to coordinate a global proof aggregation. The protocol can be implemented as an additional layer contained in Bitcoin's blockchain (similar to RGB[^5] or Taro[^6]) or as a standalone sidechain.

The throughput scales to hundreds of transactions per

	#Newbie programmer
	def factorial(x):
	if x == 0:
	return 1
	else:
	return x * factorial(x - 1)
	print factorial(6)


	#First year programmer, studied Pascal

	// === Arrays

	var [a, b] = [1, 2];
	console.log(a, b);
	//=> 1 2


	// Use from functions, only select from pattern
	var foo = () => [1, 2, 3];