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.

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HENkaku Update

Version Screen 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/.

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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.

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HENkaku KOTH Challenge

We released HENkaku a week ago and were blown away by the reception. There has been over 25k unique installs and every day new homebrew are being announced. This is all thanks to those who contributed to the SDK project back when Rejuvenate was announced. Without a working toolchain for developers and a couple of working homebrews at the time of HENkaku’s launch, I doubt the reception would have been as popular.

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HENkaku: Vita homebrew for everyone

Photo credits to Davee For the last couple of months, molecule (composed of I along with Davee, Proxima, and xyz) have been working hard to bring you an easy-to-use homebrew solution. The result is HENkaku (変革), the first HEN for the Vita. Since the release of Rejuvenate a year ago, developers have created tons of wonderful emulators, games, and apps for the Vita. Unfortunately, Rejuvenate is hard to set up, has many annoying limitations, and supports only an older firmware version. As a result, we recommended Rejuvenate only to developers who wish for an unofficial way to write apps for the Vita. When I first announced Rejuvenate and the call for an open toolchain, I emphasized that the SDK must be binary compatible with the Vita’s native loader. I published the specifications document and some gracious developers took up the task and wrote vita-toolchain. At the time, there were some pushback on why I was adamant on binary compatibility when the loader was also written by us. Well, the reason was this: developers (mostly) do not have to make any changes to their code. If your homebrew ran on Rejuvenate, it will run with HENkaku with minimal work. We ask developers to build their code with the latest toolchain now for HENkaku compatibility.

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