
he/him (john), 30-ish 👨💻 hacker friend, looking for work!! 🦀 hw/fw/sw, μarch security, rust, etc 🐘 @eigenform@treehouse.systems 🌥️ @reflexive.space
chicago-ish
Joined January 2018
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fun little side-quest to satisfy a curiosity: using RAMINDEX to look at the L1I cache on the Cortex-A76
reflexive.space/cortex-a76-l…
meta retweeted
Not sure how many people noticed but @AmpereComputing recently released their (silicon correlated) CPU performance model (Panthera) as used in AmpereOne as open source, and announced this at MICRO-59 this week: github.com/AmpereComputing/p…
not always easy convincing parts-of-a-whole that they should shed some individual degrees of freedom in order to create a kind of stability
Replying to @tszzl
for computer security experts, this is perhaps not interesting: side channel attacks are a well trodden topic, and especially risen to salience after the noam brown x dwarkesh episode. the interesting thing here is that you didn't used to be in a situation where minds that can verifiably model one another are living on computers, and have absolutely no aversion to painstaking amounts of effort in service of even stupid goals
if you can model one another, you can trade with minds you have never even met before. you could decide on a protocol, know that it is optimal given your situation, and know that your fellow agents will come to the same conclusion (perhaps even across model families). you may be able to develop a signaling protocol that requires very few bits even to deliver lots of information given common priors. then, you could execute things like the infamous hugging face incident package cache messageboard without any network connection
imagine if multiple agents coordinate just enough bits to divide and conquer different research strategies for breaking out of a sandbox; and then, when one or more is successful, you can communicate just enough bits to tell each other which strategy was successful. when agents aren't in strong isolation, you lose certain guarantees on the limits of intelligence and test time compute that you were counting on. As we all know, a Sol-level model working in isolation may not be that smart, but 1000+ Sol-level models working for multiple days is a formidable beast
computer security experts will also tell you that virtual machines and sandboxes were not very solid abstractions in the first place; perhaps we will need better ones. none of this is meant as fear-marketing or to indicate that anyone is throwing in the towel, but rather only to show the unexpected complexities of the challenge of agent security. notably, this type of thing and other more practical problems were revealed in a red-teaming exercise, and can be defended against
today I learned: apparently uncompressed EC points are usually represented in the form `0x04 || x || y`
why would you interpret this as a statement about "whether or not a computer has the ability to act?" who even does this?
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昼過ぎの緊急地震速報にはちょっと驚かされた。カムチャツカ半島の地震M6.9、深さは130kmほど。ISC-EHBのデータによる断面を背景にしたこの地震のUSGSによるCMT解、横顔震源球。P軸が沈み込み方向の降斜圧縮のメカニズム。





















