Debloating Stock Android with Rikka's Shizuku (non-root)

I received a regular android phone recently. It has modern hardware which I would never buy for myself due to it’s incompatible to open bootloader/firmware. The only phone I would like to buy are Pixels either to use GrapheneOS for privacy/security or LineageOS for root privilege. However, even such a phone with stock ROM can has its use case in my hand. It works well as an iPhone alternative for low key life activities, or gray man strategy if you prefer that terminology. ...

August 21, 2026 · 2 min · Jun

Libreboot on Dell Optiplex 3050 Micro: Installing, Debricking and Dual-Boot Linux & Windows

After months of disappearing, I’m able to come back blogging, with A LOTS of drafts. I’ll be updating more details about my current situation in a more dedicated post. But for now, let’s talk something technological interesting. Dell Optiplex 3050 Micro has been my ideal open source desktop PC for quite a while, probably since the first time when Libreboot added its support. Recently, I got the chance to have one of these as an upgrade from my older mini PC build. ...

July 18, 2026 · 9 min · Jun

How to Harden AI Instances for Privacy and Security

Background Last month, Cisco researchers detected over 1,000 Ollama instances within the first 10 minutes using Shodan scanning on 11434 port. Other services such as vLLM/llama.cpp/LangChain on 8000, LM Studio on 1234, GPT4All on 4891, are also identified. Later, Censys found 10.6K Ollama instances publicly available online, and 1.5K of these instances respond to prompts. That poses not only a great security risk of RCE, injection and poisoning, but also possible to expose private chat memory via unauthorized prompting. ...

October 18, 2025 · 6 min · Jun

Bypassing YouTube IP block with FreeTube and optimized Tor

Recently, YouTube is messing with user disobedience again. For the sake of that, FreeTube has been updating with fix multiple times. Although FreeTube has fixed the API block done by YouTube, I have to deal with a new IP block from my end as its aftermath. “YouTube has blocked your IP address from watching videos. Please try switching to a different VPN or proxy.” There are many ways to get around this IP block. Because I think switching VPN server is too heavy just for this, I would like to use a proxy. ...

August 26, 2025 · 3 min · Jun

Operational Security with Documents

Recently, I started sending/receiving documents to/from untrusted sources. In my threat model, this requires extra operational security to prevent privacy exposure and security risk. Since the offical guide is not so detailed for Windows, I decided to write one while installing on a Windows 11 LTSC. First, in Windows Terminal/PowerShell, run wsl --install to setup WSL2. Read my previous post for more detail. Because the latest verisons of Dangerzone 0.9.1 and docker desktop 4.44.3 have unsolvable bug (reports unknown error '2'), I have to choose the ealier version which works properly. ...

August 25, 2025 · 2 min · Jun