Mastodawn

Guillermo Orellana May 23, 2023

✨ eli ✨May 23, 2023

the past few months I've been working on something I think is really cool and useful and I'm SO excited to be able to share it with you today!!
What if you could pay anyone as easily as you text them? We're launching Sling beta today in the UK and Europe and soon, the world!

https://sling.money

Sling

Effortless Money Everywhere

Guillermo Orellana Feb 3, 2023

eta (moved)Feb 3, 2023

New blog post! "Reversing UK mobile rail tickets", a deep dive into how eTickets and mobile tickets work in the UK!

Featuring Java reverse engineering, interesting uses of RSA, and some interesting security implications...

📝 Read the blog post: https://eta.st/2023/01/31/rail-tickets.html
✨ Decode your own tickets at home: https://eta.st/tickets/
👤 Thanks to @eval, @unlobito, and @puck for their help along the way!

Reversing UK mobile rail tickets

The UK has used small credit-card sized tickets to pay for train travel for years and years, since long before I was born — originally theAPTIS ticket1,which...

Guillermo Orellana Jan 28, 2023