DoubleCheck

Inspiration

As someone with relatives who are susceptible to these types of scams, it's important to me that there are safety nets to better support people at risk of exploitation. I appreciate a cognitive approach to things and applications of AI relating to social interaction, so a project such as this follows my passions in tech.

What it does

DoubleCheck is an early intervention for at-risk log-in attempts. Instead of receiving a code that can easily be repeated over the phone, authentication is an in-app process where the user must first end any phone calls to proceed. The user is offered a brief, optional check-in with an AI-powered chat-bot to screen for fraud. If all seems well, authentication is then provided utilizing location-based options -- BlueTooth, GPS, or IP Address comparison before the log-in is permitted.

How we built it

Built in conjunction with Claude Code. Utilizes Typescript + React + Vite for the web app, Swift for the iOS integration. Deployed online with Render.

Challenges we ran into

The initial prototype felt a little clunky and limited -- the slow survey process would provide too much friction for members attempting a valid log-in, so I needed to brainstorm a new approach. Additionally, I didn't have any prior experience with creating apps for iOS, so the set-up was very new.

Accomplishments that we're proud of

Successfully utilizing BlueTooth with a code that changes every 3 seconds to verify a log-in via an iOS app was very cool!

What we learned

I think I learned the most about how to optimize to meet a company's business needs -- reflecting on DoubleCheck, I think it's a cool recommendation but I feel I could've gone a little farther and been more ambitious with my idea. I also feel my first implementation wasn't quite as attuned to Sound Credit Union's needs as my final result, and even then I see room for improvement. It has been very cool seeing what others have developed in this process and getting a feel for all the different approaches to this issue -- I think going forward, I'd like to be more daring with my hackathon ideas! All in all, I am proud of what I've learned -- this is my 2nd ever hackathon and my first attempt solo. I've had lots of fun and would love to partake in many more.

What's next for DoubleCheck

TBA

Built With

• claude
• express.js
• react
• swift
• typescript
• vite