I was working on unit tests for a project and I wanted a fast and easy way to create random permutations of a range of numbers. That reminded me of some things I’ve learned in elementary number theory that I thought I might share with you. There is nothing new or non-trivial in this post, but I am always excited about sharing a concrete application for abstract mathematics.
Please don’t let Trump win
To the Trump voter,
Yes, it’s a kernel exploit!
When HENkaku came out exactly a month ago from today, we posed a challenge to the scene to reverse our hack. The reason for this decision rather than to just post our writeups immediately and take all the limelight is because we believe that the Vita is a device that is so unique in its security features that we won’t be doing it proper justice by just revealing the flaws. We want people to know about how good the security is rather than just point out the mistakes made. In doing so, we hoped that hackers new and old will take the challenge and have fun with it. Today, one such challenger by the name of st4rk completed the second third of the challenge. He has written a detailed post on how he reversed the payload and I recommend you read it right now.
HENkaku Update
It’s been almost a month since the release of HENkaku. We now have over 100,000 unique installs! (That number excludes re-installs required after rebooting.) To celebrate, we are pushing the third major update and it includes features that many users have been asking for. For the impatient, you can get it right now by rebooting your Vita and installing HENkaku from https://henkaku.xyz/.
Welcome Jekyll!
Welcome to the new yifan.lu! I just completed the biggest upgrade of this blog since its inception. What? You don’t notice any changes? That’s good. Although the changes are drastic (moving from WordPress in dynamic PHP to Jekyll in static HTML), the goal was to make the changes as transparent as possible. Please let me know if you notice anything broken so I can fix it.