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Educated Guesswork

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2026

What policy makers need to know about AI safety and security original ↗

26 Jul 2026

Notes on Amazon v. Perplexity original ↗

24 Jun 2026

Why your asthma inhaler is so expensive (in the US)original ↗

9 Jun 2026

Understanding age assurance accuracy original ↗

23 May 2026

How not to mandate device-based age assurance original ↗

27 Mar 2026

Let's build a tool-using agent original ↗

6 Mar 2026

2025

I automatically generated minutes for five years of IETF meetings original ↗

31 Dec 2025

Using Government IDs for Age Assurance original ↗

19 Oct 2025

Ultra Tour Monte Rosa (UTMR) Race Report original ↗

21 Sept 2025

Olympic Grand Loop (Deer Park Loop)original ↗

15 Aug 2025

Understanding Memory Management, Part 7: Advanced Garbage Collection original ↗

27 Jul 2025

Understanding Memory Management, Part 6: Basic Garbage Collection original ↗

26 May 2025

Understanding Memory Management, Part 5: Fighting with Rust original ↗

20 Apr 2025

Understanding Memory Management, Part 4: Rust Ownership and Borrowing original ↗

31 Mar 2025

Understanding Memory Management, Part 3: C++ Smart Pointers original ↗

10 Mar 2025

Understanding Memory Management, Part 2: C++ and RAII original ↗

17 Feb 2025

Understanding Memory Management, Part 1: C original ↗

13 Jan 2025

2024

Why it's hard to trust software, but you mostly have to anyway original ↗

28 Dec 2024

Overloaded fields, type safety, and you original ↗

19 Aug 2024

River of No Return 108K Race Report (2024)original ↗

5 Aug 2024

New EV Habits for ICE Vehicle Owners original ↗

3 Jun 2024

Notes on Post-Quantum Cryptography for TLS 1.2 original ↗

24 May 2024

How to manage a quantum computing emergency original ↗

15 Apr 2024

Design choices for post-quantum TLS original ↗

30 Mar 2024

Sean O'Brien 100K Race Report (2024)original ↗

13 Mar 2024

2023

A hard look at Certificate Transparency: CT in Reality original ↗

25 Dec 2023

A hard look at Certificate Transparency, Part I: Transparency Systems original ↗

13 Dec 2023

Adventure Run Report: Northern Yosemite 50 original ↗

29 Oct 2023

Maybe someday we'll actually be able to search the Web privately original ↗

2 Oct 2023

Desolation Wilderness Seven^H^H^H^H^HTwo Summits original ↗

5 Sept 2023

Private Access Tokens, also not great original ↗

29 Aug 2023

The endpoint of Web Environment Integrity is a closed Web original ↗

18 Aug 2023

How NATs Work, Part IV: TURN Relaying original ↗

17 Jul 2023

Broken Arrow Triple Crown Race Report original ↗

10 Jul 2023

How NATs Work, Part III: ICE original ↗

2 Jul 2023

Defending against Bluetooth tracker abuse: it’s complicated original ↗

8 May 2023

How NATs Work, Part II: NAT types and STUN original ↗

17 Apr 2023

Everything you never knew about NATs and wish you hadn't asked original ↗

3 Apr 2023

Architectural options for messaging interoperability original ↗

10 Mar 2023

Network-based Web blocking techniques (and evading them)original ↗

9 Feb 2023

Internet Transport Protocols, Part I: Reliable Transports original ↗

18 Jan 2023

Surprise, blockchains won't fix Internet voting original ↗

9 Jan 2023

2022

How to securely vote for (or against) Elon Musk original ↗

24 Dec 2022

One does not simply destroy a nuclear weapon original ↗

5 Dec 2022

Can we agree on the facts about QWACs?original ↗

25 Nov 2022

First impressions of Bluesky's AT Protocol original ↗

6 Nov 2022

How to hide your IP address original ↗

17 Oct 2022

Self-Driving Vehicles, Monoculture, and You original ↗

10 Oct 2022

On the Security and Privacy Properties of Public WiFi original ↗

25 Sept 2022

ELI15: PCR and PCR Testing original ↗

14 Sept 2022

Ultra-Trail du Mont-Blanc (UTMB) Race Report original ↗

5 Sept 2022

ELI15: Private Information Retrieval original ↗

30 Aug 2022

Can we make Safe Browsing safer?original ↗

16 Aug 2022

Discovery Mechanisms for Messaging and Calling Interoperability original ↗

4 Aug 2022

Pacifica Foothills Race Report original ↗

25 Jul 2022

Verifiably selecting taxpayers for random audit original ↗

11 Jul 2022

Tenaya Loop Adventure Run 2: Redemption original ↗

8 Jul 2022

An overview of browser privacy features original ↗

4 Jul 2022

Understanding The Web Security Model, Part VI: Browser Architecture original ↗

27 Jun 2022

First impressions of Web5 original ↗

13 Jun 2022

On Blockchains/Ledgers and Identity Systems original ↗

6 Jun 2022

Understanding Online Identity original ↗

2 Jun 2022

Notes on Multiple Encryption and Content Filtering original ↗

22 May 2022

End-to-End Encryption and the EU's new proposed CSAM Regulation original ↗

19 May 2022

Understanding The Web Security Model, Part V: Side Channels original ↗

9 May 2022

Challenges in Building a Decentralized Web original ↗

25 Apr 2022

Understanding The Web Security Model, Part IV: Cross-Origin Resource Sharing (CORS)original ↗

19 Apr 2022

Lake Sonoma 50 Race Report original ↗

12 Apr 2022

End-to-End Encryption and Messaging Interoperability original ↗

7 Apr 2022

What's with the www prefix in www.example.com?original ↗

28 Mar 2022

Understanding The Web Security Model, Part III: Basic Principles and the Origin Concept original ↗

21 Mar 2022

Understanding The Web Security Model (Outtake): Cookies and Behavioral Advertising original ↗

13 Mar 2022

Understanding The Web Security Model, Part II: Web Applications original ↗

8 Mar 2022

Understanding The Web Security Model, Part I: Web Publishing original ↗

4 Mar 2022

Games, constraints, and the humanly possible original ↗

26 Feb 2022

Risks (or non-risks) of scanning QR codes original ↗

20 Feb 2022

Overview of Interoperable Private Attribution original ↗

15 Feb 2022

Ensuring Privacy For Age Verification original ↗

11 Feb 2022

DNS Security, Part VII: Blockchain-based Name Systems and Transparency original ↗

7 Feb 2022

DNS Security, Part VI: Blockchain-based Name Systems original ↗

4 Feb 2022

Privately Measuring Vaccine Doses original ↗

25 Jan 2022

DNS Security, Part V: Transport security for Recursive to Authoritative DNS original ↗

21 Jan 2022

Qualifying for prestige races (and why you won't get into Western States)original ↗

16 Jan 2022

DNS Security, Part IV: Transport security for DNS (DoT, DoH, DoQ)original ↗

5 Jan 2022

Privacy for Genetic Genealogy: Happy Goldfish Bowl Everyone original ↗

2 Jan 2022

2021

DNS Security, Part III: DANE and the WebPKI original ↗

28 Dec 2021

DNS Security, Part II: DNSSEC original ↗

24 Dec 2021

DNS Security, Part I: Basic DNS original ↗

19 Dec 2021

A look at the Dutch vaccine passport system original ↗

13 Dec 2021

Privacy Preserving Vaccine Credentials original ↗

7 Dec 2021

Highline Trail Adventure Run Report original ↗

30 Nov 2021

Privacy for license plates original ↗

28 Nov 2021

A quick look at the New Zealand Vaccine Pass original ↗

23 Nov 2021

Privacy Preserving Measurement 5: Randomization original ↗

5 Nov 2021

Modelling grade's impact on running pace original ↗

1 Nov 2021

The EU vaccine passport compromise and how to (maybe) fix it original ↗

29 Oct 2021

Sean O'Brien 100K Race Report original ↗

25 Oct 2021

Privacy Preserving Measurement 4: Heavy Hitters original ↗

15 Oct 2021

Privacy Preserving Measurement 3: Prio original ↗

13 Oct 2021

Privacy Preserving Measurement 2: Anonymized Data Collection original ↗

10 Oct 2021