-> whoami

I'm tjkr0wn, an iOS security researcher. I do things like reverse engineering some of Apple's proprietary boot-chain code or exploiting security vulnerabilities.

My current focus is on Apple devices (both hardware and software), but I'm open to expanding my attack surface to other ecosystems.

-> What got you started in security research?

I saw all this buzz about "oob_timestamp". Before I knew it, I was messing with iOS hacking in my free time.

-> Where can I find some of your research?

I've got quite a few cool bugs and projects that I haven't revealed yet, but I hope to soon enough. My public projects and exploits are most likely going to be on my GitHub. I also like to show others my cool findings in the "Hack Different" communnity.

-> What do you reverse the most?

I'm spending lots of time hand-reversing or sifting through a kernelcache, iBoot, secureROM, or SEPROM assembly.

-> Can I contact you?

Discord: tjkr0wn #3611 (I'm idle in the "Hack Different" Discord server most of the time)

PGP: https://keybase.io/tjkr0wn/pgp_keys.asc

Twitter: @tjkr0wn

Timezone: EST

-> pre-comms

bug.txt: 7256683a6ff0271c35802ae9b859c8dfbd04c9716d1e23afce12322064acf604, undisclosed, https://twitter.com/tjkr0wn/status/1422008877655097347

murajaa.txt: e450d566996ac55b87a106caab5b6e8b1204d371d8ebc79d0ae70985f5e6ad93, undisclosed, https://twitter.com/tjkr0wn/status/1455377798688817161

REDACTED.txt: 1fefc7d087c0c95c55b98902527d0445ab8e91ee15aa5a157b8710d57fdab48902f327bd482c52d39561cddb7c214db1, undisclosed, https://twitter.com/tjkr0wn/status/1577730413832810496

iBoot: A New Era

-tjkr0wn

-KASSAR SAGN