Explained
Clear explanations of the systems behind the headlines. Browse our topic desks or Daily 9.
What Is a Seed Phrase? How Recovery Words Control a Wallet
A seed phrase is the 12 to 24 words that can rebuild a self-custody wallet. How it works and how to keep it safe.
Daily 9: 2026-10-10 | Agent Payments and Connected Homes
Nine developments in agent payments, lending, browser security, software profiling and connected devices.
How Does Buy Now, Pay Later Work? Payments, Fees and Credit
BNPL splits a purchase into repayments. Check the schedule, fees and credit terms before accepting.
Daily 9: 2026-10-09 | Creative AI, Payments and Security
Nine new developments in creative AI, payments, Bitcoin collateral, authentication and spatial audio.
The Daily 9: October 8, 2026 | AI, Payments and Privacy
Nine developments in AI, payments, crypto and device security, with event dates and rollout limits.
What Is End-to-End Encryption? Devices, Keys and Backups
Encryption protects a message between its endpoints.
How Does Quantum Computing Work? From Gates to Results
Follow a quantum circuit from qubit preparation through gates, interference and measurement to a classical result.
Authenticator App vs SMS: How the Login Codes Differ
App codes avoid phone-number delivery, but app and SMS codes can both be phished.
What Is AI Hallucination? Why AI Makes Things Up and How to Check
Why a language model can state something false with full confidence, and the practical checks that catch it.
What Is RAG in AI? How Retrieval-Augmented Generation Works
How an AI system looks up passages in a set of documents before it answers, and where that can still go wrong.
What Is a Security Key? How Hardware Keys Stop Phishing
A small device that proves it is you when you sign in, and that a fake login page cannot trick.
What Is a Qubit? How Quantum Bits Work and Why They Are Fragile
The basic unit of a quantum computer: read out as 0 or 1, but able to hold a mix of both until it is measured.
What Is Post-Quantum Cryptography? How Quantum-Safe Encryption Works
New encryption built to withstand quantum computers, running on the phones and computers you already use.
The Daily 9 — September 26: AI Costs, Stablecoin Cards, Quantum Tests
Nine developments announced September 22–24, selected for the September 26 launch briefing.
Running AI Locally: What Your Laptop Can—and Cannot—Handle
Memory, model size and input length determine what your laptop can run comfortably.
On-Device vs. Cloud Processing: Where Your Data Goes
Where computation happens changes a feature's privacy, speed, capability and need for connectivity.
Before You Install a Browser Extension, Check These Permissions
Compare an extension's requested access with the task you expect it to perform.
Why the Same Token Can Exist on Several Networks
A token's ticker is not enough: the network and contract determine which asset you are sending.
Why an International Transfer Can Take Minutes—or Days
Funding, currency conversion, checks and local payout all affect when a transfer arrives.
What Happens to Your Files When You Upload Them to an AI Tool?
Uploading a file raises separate questions about processing, storage, training and deletion.
What Happens When a Cloud Region Goes Offline?
Regional recovery depends on application design, replicated data and a tested route to another location.
Local-First Apps: What Changes When Your Files Stay on Your Device?
Local-first software keeps a usable copy on your device and synchronizes it with other copies.
Stablecoins Explained: What Keeps a Digital Dollar Worth a Dollar?
Reserves, redemption and market liquidity help explain whether a stablecoin can hold its target price.
A Banking App Isn’t Always a Bank: How to Tell the Difference
The app you use and the institution holding your money may be different organizations.