Engineer’s Notes: QR Codes & Stress-Free Travel
Published in
12 min readSep 24, 2023
Not so long ago, I used a mass transit service. A ticket inspector came and asked me for my ticket. I pulled the phone from my pocket, unlocked it, launched the ticket app, clicked “Show my QR code,” and…
My heart began to race as the QR code was loading longer than I anticipated. I glanced at my surroundings, and to my horror, I realized we were in a tunnel. Thus, at least…