Steven Murdoch

@sjmurdoch
684 Followers
230 Following
17 Posts
My article on hidden messages within GPS signals was featured on @404mediaco. It was also covered in the WIRED Security Newsletter https://www.wired.com/story/security-news-this-week-crypto-funded-chinese-peptide-labs-are-booming/ and discussed on Hacker News https://news.ycombinator.com/item?id=48411799
Crypto-Funded Chinese Peptide Labs Are Booming

Plus: Hackers use Meta’s AI bots to hack Instagram accounts, Anthropic helps NSA hackers, a decades-long GPS satellite mystery may have been solved, and more.

WIRED
I spoke to The Guardian about Anthropic’s call for mechanisms to slow the development of frontier AI capabilities. https://www.theguardian.com/technology/2026/jun/05/anthropic-urges-temporary-pause-on-ai-development-to-discuss-risks

RE: https://mastodon.social/@sjmurdoch/116681186650836098

For the tl;dr, I wrote a summary of my analysis of the GPS Special Message “number station”, including entropy measurement, duplicated strings, a mysterious new “TEXT” prefix, and the system’s relationship with military key distribution. https://www.benthamsgaze.org/2026/06/02/the-quiet-numbers-station-decoding-nineteen-years-of-gps-cryptography/

The source code is available on GitHub, and the data is on Zenodo. I’d welcome follow-up analysis. https://github.com/sjmurdoch/gps-special-messages
GitHub - sjmurdoch/gps-special-messages: Analysis of the GPS Special Message field

Analysis of the GPS Special Message field. Contribute to sjmurdoch/gps-special-messages development by creating an account on GitHub.

GitHub
For 19 years, GPS satellites have secretly broadcast a “numbers station” in their public signals. We decoded 12M messages: a 2011 flash where 31 of 32 satellites flipped in hours, “ghost” substrings repeating years apart, and a “TEXT” prefix spreading now. https://lsc-pagepro.mydigitalpublication.com/publication/?i=865273&p=62&view=issueViewer
Claude Opus 4.7 is out, and I’ve been interfacing it with the National Rail Live Departure Boards API. I leave you with a poem inspired by the current departures from St Pancras station.
MCP gives AI tools access to powerful capabilities but is notorious for heavy token use. AXI is a promising token-efficient alternative but it relies on predicting typical tool usage. I've proposed a modification where tools self-tune through an OODA loop. https://github.com/kunchenguid/axi/pull/29