FreeStyle Libreをバラしてみました
ピッタリ２週間で使えなくなったされたLibreをバラしてみました。 真ん中の黒いのが腕にささってました。長さ５ミリ。すごくフニャフニャです。専用センサ取り付けツールを使わないと真っ直ぐささりそうもありません。 しっかりくっついているフタをこじあけました。ボタン電池、チップ、温度センサ？外周の丸いパターンはNFCのアンテナのようです。チップは完全カスタムとおもいきやTIの既製品（またはそのカスタマイズ品）のようです。この方も分解されてます。４年前のものですが基盤はまったく同じですね。...
혈당 측정 이야기
제가 그 동안 탄수화물 섭취, 저당질 다이어트에 대해서 배우면서 제 몸의 혈당치가 어떻게 되어 있는지 너무 궁금해서 드디어 연속적 포도당 모니터링 (Continuous Glucose Monitoring:...
Server Name Indication (SNI)
Now that I could link OpenSSL library to my program, I tried to use it for a simple client connection to a TLS server....
Linking with OpenSSL
I struggled to link with OpenSSL library. I thought this is a good opportunity to learn more about cmake. However, I couldn’t find a...
SHA256
Now that I had SeverHello which contains a cipher suite to be used in key exchange, I can start serious algorithms instead of tedious...
Client Hello
I have managed to set up basic c++ and boost environment as in the previous post. I found in the default compiler setting, c++11...
Learning TLS (aka SSL)
To understand the modern HTTP with security layer including encryption algorithm and key exchange rituals, I decided to learn TLS (Transport Layer Security) protocol...
Bunnies Saved!
So I spent one whole weekend + most of the new year holidays to solve foobar problems. The last one (level 5) was the...
Evil organization?
When I was googling ‘javascript regular expression’, the browser brought me this. I didn’t know about Google’s foobar challenge but it seems it’s been...
Ethernet packet sniffing
So my first post is about how to set up the environment for Ethernet packet sniffing for external devices. This allows me to monitor...