Doom in the iPhone photos app (barely)
eieio.games
eieio.games
The GIF specification, GIFs that work and those that don't, and a hex editor.
Given all the other impressive work in this article, I'm surprised that wasn't an easy problem for them to debug --- the latter seems almost trivial to me (find the differences) in contrast to the amount of creative thinking required to figure out how to run Doom in iPhone Photos.
eieio.games uses an invalid security certificate.
The certificate is not trusted because it was signed
using a signature algorithm that was disabled because
that algorithm is not secure.
Error code: SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED