A hackathon‑born concept that replaces passwords with visual stories so preschoolers and their families can log in safely. Built in 48 hours; recognized at Europe’s largest hackathon.
In 2018 I volunteered for a year at a kindergarten in Tallinn, teaching English and helping educators introduce robotics and programming. Many preschoolers were already using phones and tablets, yet couldn’t read or write. That experience sparked an idea: could we design security that a five‑year‑old can use — without text?
At Junction 2019, I joined a new team to build a prototype that turned passwords into memorable visual stories. The goal was radical simplicity: a login so intuitive a child or a grandparent could succeed on the first try.
Young children go online early but choose weak passwords or forget them. Parents often reuse simple passwords across accounts. Existing password managers are built for adults — not families with preschoolers.
Tassu Passu replaces text passwords with a short sequence of images — a story that’s easy to remember and hard to brute‑force. Behind the scenes, the sequence maps to a secure hash and supports two‑factor authentication.
Tap to pick characters, places and objects to tell a tiny story.
Manage accounts, set app access, and add kids.
Tassu Passu came to life thanks to a small, diverse team. Each of us brought a complementary skill set to the table:
Our winning Junction 2019 presentation. I designed and produced all of the visuals for our pitch deck, while Reinis delivered the winning pitch.
Building security for very young users means eliminating friction, not understanding. Visual storytelling gave us a path to strong authentication without text. The project sharpened my rapid‑prototyping, cross‑functional collaboration and “explain complex tech simply” skills.
Student project: Tassu Passu
Local Finnish feature on Tassu Passu
Reporting on our €10k win
Cybersecurity behind a cute design
Watch our winning presentation