Joe Rozner
@jrozner.bsky.social
Startups, hacking, snowboarding. I build shit in Los Angeles. Writing about my journey to scalable vuln discovery @ https://goingbeyondgrep.com
First two ghosts finished. Still need to process the pink
November 2, 2025 at 12:47 AM
First two ghosts finished. Still need to process the pink
The first of my practice ghosts before I start working with the final colored tubes
October 18, 2025 at 7:30 PM
The first of my practice ghosts before I start working with the final colored tubes
First time making a chocolate soufflé. It came out ok except for the whole leaning part
October 13, 2025 at 4:02 AM
First time making a chocolate soufflé. It came out ok except for the whole leaning part
If I write a shared object that can get LD_PRELOADed or use frida to tamper/leak passkey registrations, can I present on the defcon main stage too?
August 29, 2025 at 5:30 PM
If I write a shared object that can get LD_PRELOADed or use frida to tamper/leak passkey registrations, can I present on the defcon main stage too?
Someone is going to have a bad day when they realize they lost this
June 17, 2025 at 5:33 PM
Someone is going to have a bad day when they realize they lost this
Generally happy with the how my hushcon presentation came out but it definitely should have been 45 minutes. It felt rushed and like I had to trim a lot. Hopeful to bring a revised version somewhere else and continue to talk about what we can do to improve authNZ and IAM
June 15, 2025 at 7:33 PM
Generally happy with the how my hushcon presentation came out but it definitely should have been 45 minutes. It felt rushed and like I had to trim a lot. Hopeful to bring a revised version somewhere else and continue to talk about what we can do to improve authNZ and IAM
This year’s contest was an rp2350 based “crypto wallet” with secure boot, encrypted flash, protected OTP, disabled debugging, and the glitch detectors turned up. The design is meant to be a target to easily replicate Aeden’s attack against the chip with no desoldering
May 26, 2025 at 5:33 PM
This year’s contest was an rp2350 based “crypto wallet” with secure boot, encrypted flash, protected OTP, disabled debugging, and the glitch detectors turned up. The design is meant to be a target to easily replicate Aeden’s attack against the chip with no desoldering
The one thing I do miss about Covid was just not getting sick. I feel like it’s still much less frequent than I used to but I basically went two years with nothing
April 29, 2025 at 4:05 PM
The one thing I do miss about Covid was just not getting sick. I feel like it’s still much less frequent than I used to but I basically went two years with nothing
The Offspring is touring with Jimmy Eat World and New Found Glory. What year is it?
April 23, 2025 at 6:14 AM
The Offspring is touring with Jimmy Eat World and New Found Glory. What year is it?
I bought a $1300 pen plotter from Bantam Tools. I go to set it up and the software fails to run because I don't have rosetta2 installed on my mac. We're 5 years into Apple releasing Apple Silicon. How do you sell a high end commercial product and not support it yet?
April 21, 2025 at 10:15 PM
I bought a $1300 pen plotter from Bantam Tools. I go to set it up and the software fails to run because I don't have rosetta2 installed on my mac. We're 5 years into Apple releasing Apple Silicon. How do you sell a high end commercial product and not support it yet?
This crosswalk hack needs to get nominated for a pwny
April 13, 2025 at 3:33 PM
This crosswalk hack needs to get nominated for a pwny
Is now the right time to invest in the company that made the nets Foxconn used for when manufacturing comes back to the US?
April 8, 2025 at 6:26 PM
Is now the right time to invest in the company that made the nets Foxconn used for when manufacturing comes back to the US?
Really excited to test out the YubiHSM 2 as a very low cost option for running our PKI on prem.
April 8, 2025 at 3:58 PM
Really excited to test out the YubiHSM 2 as a very low cost option for running our PKI on prem.
Found some old photos from @cellphonedude.bsky.social of me learning how to blow fire at shellcon
April 8, 2025 at 1:56 AM
Found some old photos from @cellphonedude.bsky.social of me learning how to blow fire at shellcon
Got an instant pot. First time using it immediately burned the shit out of my hands. Also, searing in a tall narrow pot is not the way. Will definitely be doing that in a pan and transferring going forward
April 7, 2025 at 1:41 AM
Got an instant pot. First time using it immediately burned the shit out of my hands. Also, searing in a tall narrow pot is not the way. Will definitely be doing that in a pan and transferring going forward
Enjoying the 1” of overnight powder. At least it’s slightly better than the ice sheet it was yesterday
March 30, 2025 at 5:24 PM
Enjoying the 1” of overnight powder. At least it’s slightly better than the ice sheet it was yesterday
Got some ducks taking a nap by the pool
March 25, 2025 at 10:17 PM
Got some ducks taking a nap by the pool
I don’t understand how it can be so hard, especially into your 30s, to just tell someone “I’m not interested in you anymore” or just cancel plans rather than just ghost someone mid planning a date
March 18, 2025 at 1:35 AM
I don’t understand how it can be so hard, especially into your 30s, to just tell someone “I’m not interested in you anymore” or just cancel plans rather than just ghost someone mid planning a date
This is one of my favorite photos I have of Oso and I. He’s now been gone for longer than I had him which is crazy to realize
March 16, 2025 at 5:56 PM
This is one of my favorite photos I have of Oso and I. He’s now been gone for longer than I had him which is crazy to realize
Just ordered a reel of chips for this years intercept at l1. Get hyped and start prepping
March 15, 2025 at 5:19 PM
Just ordered a reel of chips for this years intercept at l1. Get hyped and start prepping
Working with context values is sort of annoying in Go because of need to type assert. With generics we can make it a bit easier. Only thing I can't figure out is how to instantiate the generic type without an allocation in the failure cases
gist.github.com/jrozner/2f93...
gist.github.com/jrozner/2f93...
gist:2f9394eaaad546e4c59745c1eccca6fb
GitHub Gist: instantly share code, notes, and snippets.
gist.github.com
March 6, 2025 at 8:43 PM
Working with context values is sort of annoying in Go because of need to type assert. With generics we can make it a bit easier. Only thing I can't figure out is how to instantiate the generic type without an allocation in the failure cases
gist.github.com/jrozner/2f93...
gist.github.com/jrozner/2f93...
Why isn’t there an escape from LA/NY themed escape room? Or even better a whole John carpenter themed set of rooms
March 4, 2025 at 5:33 AM
Why isn’t there an escape from LA/NY themed escape room? Or even better a whole John carpenter themed set of rooms
I thought I was ready for solid food again. That seems like it was a mistake. Time to play is it going to stay down or not
February 28, 2025 at 5:20 AM
I thought I was ready for solid food again. That seems like it was a mistake. Time to play is it going to stay down or not
I can’t keep my kiwi Siri and use image playground
February 25, 2025 at 12:05 AM
I can’t keep my kiwi Siri and use image playground