DEV Community

Tetsuharu Fujiki profile picture

Tetsuharu Fujiki

Solo dev, Lafine Systems Design. I build RoamSwitch, a defensive security tool for Mac & Linux on untrusted Wi-Fi. Here: shipping an indie security product, and the OS internals under it.

Location Kanagawa, Japan Joined Joined on  Personal website https://lafine.net/ github website

Work

Independent developer — Lafine Systems Design

Running defensive security on a Clockwork uConsole, and why edge Linux needs its own shield
lafine_systemsdesign profile

Running defensive security on a Clockwork uConsole, and why edge Linux needs its own shield

#linux #raspberrypi #security #programming
1
Comments 2
4 min read

Want to connect with Tetsuharu Fujiki?

Create an account to connect with Tetsuharu Fujiki. You can also sign in below to proceed if you already have an account.

Create Account
Already have an account? Sign in
macOS is LEGO. Linux is Minecraft. Notes from building the same app in both.
lafine_systemsdesign profile

macOS is LEGO. Linux is Minecraft. Notes from building the same app in both.

#linux #macos #programming #security
Comments
6 min read
Dropping BadUSB Keystrokes on macOS Before They Open Spotlight
lafine_systemsdesign profile

Dropping BadUSB Keystrokes on macOS Before They Open Spotlight

#macos #security #swift #hardware
Comments
5 min read
How I Used an Uncensored Local LLM for Adversarial QA on My macOS App
lafine_systemsdesign profile

How I Used an Uncensored Local LLM for Adversarial QA on My macOS App

#macos #security #testing #ai
3
Comments 2
5 min read
Hacking My Own Mac App: Penetration Testing macOS Defense Boundaries in a VM
lafine_systemsdesign profile

Hacking My Own Mac App: Penetration Testing macOS Defense Boundaries in a VM

#security #macos #virtualization #swift
Comments
5 min read
The Hidden Security Blind Spots in Local AI Workflows
lafine_systemsdesign profile

The Hidden Security Blind Spots in Local AI Workflows

#ai #macos #security #llm
Comments
5 min read
Nobody searches for security apps. So I made mine a tool for AI agents instead.
lafine_systemsdesign profile

Nobody searches for security apps. So I made mine a tool for AI agents instead.

#security #ai #indiehackers #macos
Comments
6 min read
My app's landing page says 'Zero Telemetry'. So I wiretapped my own app to prove it.
lafine_systemsdesign profile

My app's landing page says 'Zero Telemetry'. So I wiretapped my own app to prove it.

#security #privacy #testing #networking
Comments 2
8 min read
I open-sourced part of my app, got scared, and fuzzed it before anyone else could
lafine_systemsdesign profile

I open-sourced part of my app, got scared, and fuzzed it before anyone else could

#security #swift #testing #opensource
Comments
6 min read
I attacked my own Mac from another machine on the same LAN — and found a bug in my own app
lafine_systemsdesign profile

I attacked my own Mac from another machine on the same LAN — and found a bug in my own app

#security #networking #linux #homelab
Comments
6 min read
Did you know `next dev` binds to 0.0.0.0 by default?
lafine_systemsdesign profile

Did you know `next dev` binds to 0.0.0.0 by default?

#security #webdev #networking #nextjs
Comments
4 min read
You're probably overestimating public Wi-Fi 'client isolation'
lafine_systemsdesign profile

You're probably overestimating public Wi-Fi 'client isolation'

#security #networking #wifi #privacy
1
Comments 3
3 min read
The app was the easy part. Getting anyone to trust a security tool from a solo dev wasn't.
lafine_systemsdesign profile

The app was the easy part. Getting anyone to trust a security tool from a solo dev wasn't.

#security #indiehackers #startup #opensource
Comments
5 min read
loading...