When we started supporting LTI 1.3/Advantage (back in May of 2019) we chose to generate public/private key pairs for the tools. The tool vendor was then responsible for copying and storing those values on their side.
In testing with the Google Canary Chrome Browser, one of our clients discovered an issue that was blocking users from logging in to their Learn instance. After much troubleshooting, we discovered a multi-layer issue that brings us to, you guessed it, cookies.
Most people like cookies. Internet browsers used to like cookies, but a lot has changed in the last few years.
We are seeing a lot of applications stop working in some browsers because cookies are not being shared, and this post hopes to help explain why that is happening and what can be done about it.
Be sure to revisit the Developing an LTI Advantage Solution page for the latest and greatest tutorial from DevCon 2020!