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Over-the-Counter CGM for $50: My Experience

2025-06-30

Continuous Glucose Monitoring (CGM) is now available over-the-counter for $50. This device, resembling a thick guitar pick, measures glucose levels every 5 minutes, transmitting data to a smartphone app. The author's experience highlighted unexpected blood sugar spikes from seemingly healthy meals and the significant impact of exercise. While data export isn't directly supported, integration with Apple Health allows for data retrieval. The gamified aspect of monitoring blood sugar levels proved highly effective. Overall, the device provides affordable and accessible glucose monitoring, offering valuable insights into personal health.

WebAuthn: The Future of Passwordless Authentication

2024-12-26

This book delves into WebAuthn, a public key cryptography-based authentication system designed to replace vulnerable password systems. Starting with the shortcomings of passwords, it progressively introduces core WebAuthn concepts, including U2F, FIDO2, passkeys, and the WebAuthn API's usage. It details public key signature schemes, RP IDs, the CTAP2 protocol, attestation, and various extensions. Server-side implementation, platform APIs (iOS, Android, Windows), and public key formats are also covered. WebAuthn combines security keys and platform authenticators, utilizing random challenges and multiple security mechanisms to effectively address phishing attacks and database leaks, providing users with a more secure and reliable authentication experience.