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Discuss – Do AI agents deserve all the hype they are getting?

2•MicroWagie•13m ago•0 comments

LLMs are powerful, but enterprises are deterministic by nature

3•prateekdalal•4h ago•2 comments

Ask HN: Anyone Using a Mac Studio for Local AI/LLM?

47•UmYeahNo•1d ago•29 comments

Ask HN: Non AI-obsessed tech forums

25•nanocat•15h ago•21 comments

Ask HN: Ideas for small ways to make the world a better place

15•jlmcgraw•17h ago•19 comments

Ask HN: 10 months since the Llama-4 release: what happened to Meta AI?

44•Invictus0•1d ago•11 comments

Ask HN: Who wants to be hired? (February 2026)

139•whoishiring•4d ago•515 comments

Ask HN: Who is hiring? (February 2026)

313•whoishiring•4d ago•512 comments

Ask HN: Non-profit, volunteers run org needs CRM. Is Odoo Community a good sol.?

2•netfortius•12h ago•1 comments

AI Regex Scientist: A self-improving regex solver

7•PranoyP•19h ago•1 comments

Tell HN: Another round of Zendesk email spam

104•Philpax•2d ago•54 comments

Ask HN: Is Connecting via SSH Risky?

19•atrevbot•2d ago•37 comments

Ask HN: Has your whole engineering team gone big into AI coding? How's it going?

18•jchung•2d ago•12 comments

Ask HN: Why LLM providers sell access instead of consulting services?

5•pera•1d ago•13 comments

Ask HN: What is the most complicated Algorithm you came up with yourself?

3•meffmadd•1d ago•7 comments

Ask HN: How does ChatGPT decide which websites to recommend?

5•nworley•1d ago•11 comments

Ask HN: Is it just me or are most businesses insane?

8•justenough•1d ago•7 comments

Ask HN: Mem0 stores memories, but doesn't learn user patterns

9•fliellerjulian•2d ago•6 comments

Ask HN: Is there anyone here who still uses slide rules?

123•blenderob•3d ago•122 comments

Kernighan on Programming

170•chrisjj•4d ago•61 comments

Ask HN: Any International Job Boards for International Workers?

2•15charslong•14h ago•2 comments

Ask HN: Anyone Seeing YT ads related to chats on ChatGPT?

2•guhsnamih•1d ago•4 comments

Ask HN: Does global decoupling from the USA signal comeback of the desktop app?

5•wewewedxfgdf•1d ago•3 comments

We built a serverless GPU inference platform with predictable latency

5•QubridAI•2d ago•1 comments

Ask HN: Does a good "read it later" app exist?

8•buchanae•3d ago•18 comments

Ask HN: How Did You Validate?

4•haute_cuisine•1d ago•6 comments

Ask HN: Have you been fired because of AI?

17•s-stude•4d ago•15 comments

Ask HN: Cheap laptop for Linux without GUI (for writing)

15•locusofself•3d ago•16 comments

Ask HN: Anyone have a "sovereign" solution for phone calls?

12•kldg•4d ago•1 comments

Ask HN: OpenClaw users, what is your token spend?

14•8cvor6j844qw_d6•4d ago•6 comments
Open in hackernews

Reverse engineering Twitter's new WASM-based "X-XP-Forwarded-For" antibot header

17•dsekz•8mo ago
Twitter/X recently added a new header called X-XP-Forwarded-For, generated and encrypted by their own WASM-based fingerprinting system. This repo breaks down the entire flow: https://github.com/dsekz/twitter-x-xp-forwarded-for-header

Comments

Raed667•8mo ago
so the encryption is pretty much hardcoded making it more like an "obfuscation" ?
dsekz•8mo ago
You’re right. In this case, just knowing the guest_id is enough to break down the header. Twitter’s main goal here is mostly to obfuscate the data and make the reverse engineering process more painful.
seventh12•8mo ago
Reversing will always win
dsekz•8mo ago
In its current state, the protections are pretty weak. I’m sure they’ll update it, and we’ll see what changes they bring. If this header is meant to serve as an anti-bot measure, then there’s a lot more work they need to do both on the JS and WASM sides. On top of that, processing fingerprint data on the backend, like building user/fingerprint profiles, analyzing detailed browser, device and low level connection info, and using AI to spot patterns, makes the system a lot more complex. However, based on the current implementation, I anticipate they’ll likely stick to a relatively simplistic approach.