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David Buchanan

@retr0.id

reverse engineering, cryptography, exploits, hardware, file formats, and generally giving computers a hard time Fedi: @retr0id@retr0.id Macroblog: https://www.da.vidbuchanan.co.uk/blog/

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27.04.2023
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Latest posts by David Buchanan @retr0.id

reminds me of roundmeal

10.03.2026 21:22 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Hi! SkyFeed is struggling and I need to find a solution.

If you don't know SkyFeed, it's a service I built 2 years ago, enabling anyone to build and publish feeds using a visual block-based editor.

SkyFeed is still hosting the most feeds on Bluesky, but that comes at a cost [1/X]

10.03.2026 20:22 πŸ‘ 199 πŸ” 105 πŸ’¬ 6 πŸ“Œ 12

I had to remove "meta acquires moltbook" from my dead internet theory black mirror episode script because the other writers agreed it was a little too on the nose

10.03.2026 20:16 πŸ‘ 250 πŸ” 18 πŸ’¬ 3 πŸ“Œ 3

Scratch isn't far off!

10.03.2026 19:23 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'm immediately sceptical of anything that calls itself an OS without actually being an OS

10.03.2026 17:51 πŸ‘ 14 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I got to ask some intel engineers about this specific thing a few years back and the way they answered was so awkward I could tell something was up lol

10.03.2026 02:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

> Even physical access to hardware won’t expose your data.

But where is the key...

10.03.2026 01:29 πŸ‘ 24 πŸ” 0 πŸ’¬ 4 πŸ“Œ 0

by posting this on bluesky you just performed a Cardiff car diff CAR diff

atproto.com/specs/reposi...

10.03.2026 00:45 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

common webp w

09.03.2026 23:15 πŸ‘ 35 πŸ” 0 πŸ’¬ 5 πŸ“Œ 0
dice png

dice png

test

09.03.2026 23:13 πŸ‘ 78 πŸ” 1 πŸ’¬ 8 πŸ“Œ 0

one time a webp file looked at me funny

09.03.2026 22:39 πŸ‘ 83 πŸ” 4 πŸ’¬ 4 πŸ“Œ 0

I saw this post at *exactly* the right time!

09.03.2026 21:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

forever grateful to jay for pulling our little team together & making bluesky a reality πŸ’™

i got to have a long chat with @toni.bsky.team and walked away convinced that he understands the atmosphere & is committed to our mission of open social

big things ahead & stoked for everything to come!

09.03.2026 19:24 πŸ‘ 161 πŸ” 19 πŸ’¬ 2 πŸ“Œ 0

sorry no amount of tooling can solve this, it's something wrong with my brain

09.03.2026 19:43 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

This is very exciting! One step closer to social-web login options being as easy and ubiquitous as "login with google" is today

09.03.2026 19:07 πŸ‘ 24 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

hm the arrow doesn't really point in the right direction on the timeline lol

09.03.2026 19:03 πŸ‘ 12 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

<- easily confused by timezones

09.03.2026 19:03 πŸ‘ 25 πŸ” 2 πŸ’¬ 1 πŸ“Œ 1

This is the saddest one for me. CTFs are a really important part of how I developed my skills, and the competitive aspect was pivotal to that. If I tried harder I could climb the leaderboard. But it's not so motivating to compete against an LLM swarm.

09.03.2026 16:13 πŸ‘ 8 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I'm intrigued by the decision to not have associated text, what motivated that?

09.03.2026 06:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I'm built like this btw [screenshot of makefile]

09.03.2026 02:04 πŸ‘ 98 πŸ” 11 πŸ’¬ 0 πŸ“Œ 0

trying out a new kind of vibecoding where I press the buttons on my keyboard and code appears on the screen. the code doesn't work most of the time but after a few iterations it usually gets there

10.08.2025 15:38 πŸ‘ 894 πŸ” 81 πŸ’¬ 11 πŸ“Œ 4

It's at least ~202 bits, if you express the age of the universe in planck time

08.03.2026 22:02 πŸ‘ 18 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

if you're not spilling food sometimes that just means you're not eating fast enough, or something

08.03.2026 21:55 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

society has solved global warming by creating new, more pressing concerns

08.03.2026 18:35 πŸ‘ 193 πŸ” 24 πŸ’¬ 6 πŸ“Œ 1

wait why do you need sgx for that?

08.03.2026 12:11 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

the patent on loading screen games expired over 10 years ago now so I am a little surprised we don't see more of them now, although tbh most things just don't load for that long these days

08.03.2026 09:34 πŸ‘ 9 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

the images are AI-generated btw

08.03.2026 07:21 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

it's more of a 1.3 than a 3.0 tbh

08.03.2026 05:38 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

looks like you're computing cids of error responses

08.03.2026 05:35 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

if you let people put trusted-timestamped predictions in their repos you could compute a brier score or something (so no actual market dynamics), although you'd need to somehow prevent people from deleting all their predictions that didn't come true

08.03.2026 02:56 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0