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Hovav Shacham

@hovav@infosec.exchange
  • Open on infosec.exchange

Security, privacy, and tech policy at UCSD.

“[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.”

Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

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20 Posts
Joined November 13, 2022
Website:
https://www.cs.utexas.edu/~hovav/
Backdoored compiler attack idea:
Karger and Schell, Multics security evaluation, 1974

Posts

Open post
hovav
Hovav Shacham @hovav@infosec.exchange · Jul 24, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Recent advances in browser security, a thread! 🧵 TL;DR: Mohabi (OSDI 2026)¹ shows that we can build a principled in-process sandbox for a JavaScript runtime using SFI, at circa 25% runtime overhead in benchmarks. It’s not getting upstreamed, though. (1/x) __ ¹ Cf. @shravanrn@infosec.exchange’s post yesterday, https://infosec.exchange/@shravanrn/116972152609467885
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hovav
Hovav Shacham @hovav@infosec.exchange · Jul 23, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Derek Lowe: The Trump administration hates academic science funding, full stop. They hate where that money goes, and they hate who it goes to. They want to keep all that money for themselves, to hand out to favored cronies who can help them get elected and to steer yet more money and more power back into their hands. https://www.science.org/content/blog-post/assault-science-funding-continues
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hovav
Hovav Shacham @hovav@infosec.exchange · Jul 20, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
This work contains an exposition of the seven foremost unsolved problems in the domain of isogeny-based cryptography, obtained by asking eleven experts in isogeny-based cryptography what they considered to be the most important unsolved problems in isogeny-based cryptography, and curated down to the seven problems in this document. For each problem, an expert wrote a short write-up giving the precise statements and descriptions per problem. https://eprint.iacr.org/2026/1431 Self-recommending!
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hovav
Hovav Shacham @hovav@infosec.exchange · Jul 19, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @lindsey@recurse.social
@lindsey@recurse.social texting my friend that I was going to H-E-B and did they need anything https://www.reddit.com/r/GoingToHEB/
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hovav
Hovav Shacham @hovav@infosec.exchange · Jul 14, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
ETH is looking to recruit tenured faculty in security for its new campus in Heilbronn, Germany: https://ethz.ch/en/the-eth-zurich/working-teaching-and-research/faculty/faculty-affairs/ausgeschriebene-professuren/eth-zuerich-campus-heilbronn/professuren-fuer-cybersecurity--f-m-d-.html Applications from all areas within Cybersecurity, interpreted broadly, are encouraged. Potential topics include but are not limited to foundations for information security (including cryptography, and formal methods), system security (hardware, software, platforms) across a wide range of systems, network and wireless security, AI security, human factors in security, and privacy.
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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 25, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @jerry@infosec.exchange
@jerry@infosec.exchange Mazel!!
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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 25, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange

The fifth recording in Wild Up’s Julius Eastman survey, Gay Guerrilla, will be released in June and is available for preorder: https://wildup.bandcamp.com/album/julius-eastman-vol-5-gay-guerrilla

Julius Eastman, Vol. 5: Gay Guerrilla, by Wild Up, Christopher Rountree, Julius Eastman
Wild Up

Julius Eastman, Vol. 5: Gay Guerrilla, by Wild Up, Christopher Rountree, Julius Eastman

8 track album

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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 24, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @hovav@infosec.exchange
On her blog, Lisa Hirsch has a roundup of MTT obits, including the one she wrote for NPR. https://irontongue.blogspot.com/2026/04/michael-tilson-thomas.html
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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 23, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange

Michael Tilson Thomas has died. A titan of 20th (and early 21st) century music. May his memory be for a blessing.

https://www.sfchronicle.com/entertainment/classical/article/michael-tilson-thomas-dead-sf-symphony-17814182.php

www.sfchronicle.com

Client Challenge

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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 21, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @aburka@hachyderm.io
@aburka I want us to consider architecting software in a way that rules out entire classes of bugs, rather than hoping we have fixed the last 354 instances.
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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 21, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange

RE: @tomrittervg@infosec.exchange

Respect to the Firefox team!

But: At what point do you conclude that our way of delivering security-critical software via ever-growing piles of trusted C++ isn’t working, and won’t?

infosec.exchange

Tom Ritter: "New version of Firefox released. It's got uh..…" - Infosec Exchange

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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 19, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @hovav@infosec.exchange
(Fashion report: Jean-Yves Thibaudet has apparently retired his trademark red socks, but the sparkly bits on his opera pumps were matched to the sparkly bits on the lapels and turnback cuffs of his dinner jacket.)
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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 19, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange

Richard Ginell reviews the LA Phil’s production of the Turangalîla symphony: https://www.sfcv.org/articles/review/simone-young-takes-messiaens-mighty-turangalila

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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 11, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange

Der Schwer­belastungs­körper und Die Schwer­belastungs­körperaussichts­plattform, from Greg Allen: https://greg.org/archive/2026/04/10/der-schwerbelastungskorper-und-die-schwerbelastungskorperaussichtsplattform.html

In 1941 Hitler’s architect Albert Speer got approval to build a giant triumphal arch on a main axis of a redesigned Berlin, and quickly built the Schwerbelastungskörper, or heavy load-bearing structure, to test the ability of the marshy soil to support such a ridiculously large structure.

greg.org

Der Schwer­belastungs­körper und Die Schwer­belastungs­körperaussichts­plattform – greg.org

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hovav
Hovav Shacham @hovav@infosec.exchange · Apr 10, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @cxiao@infosec.exchange
@cxiao @Sempf Thanks! I learned how to footnote from @marasawr .
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hovav
Hovav Shacham @hovav@infosec.exchange · Mar 21, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @sophieschmieg@infosec.exchange
@sophieschmieg Is it possible that the recipients have a history of discriminatory comments about Iranian students? I understand that is sometimes a positive factor for the award committee.
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hovav
Hovav Shacham @hovav@infosec.exchange · Mar 05, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @khaled@typo.social
@khaled @behdad I'm well aware. You are misinterpreting what Don wrote. Please don't drag him into this to justify your choices.
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hovav
Hovav Shacham @hovav@infosec.exchange · Mar 05, 2026
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @behdad@typo.social
@behdad @khaled please don't drag Don into this, thanks.
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hovav
Hovav Shacham @hovav@infosec.exchange · Oct 27, 2023
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange
Replying to @rsc@hachyderm.io
@rsc Right! I remember that version used to be easier to find.¹ It’s too bad that the ACM HTML version it was based on was never updated to match.² __ ¹ Saved by the Archive: https://web.archive.org/web/20010410053444/http://cm.bell-labs.com/who/ken/trust.html ² Also saved by the Archive: https://web.archive.org/web/20070714062657/http://www.acm.org/classics/sep95/
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hovav
Hovav Shacham @hovav@infosec.exchange · Oct 26, 2023
Hovav Shacham
@hovav@infosec.exchange

Security, privacy, and tech policy at UCSD. “[U]niquely among all government employees, lie[s] outside the scope of [the government speech] doctrine; […] stand[s] alone on a First Amendment pedestal, free to say what [he] please[s], no matter what [his] government employers, including even the State Legislature, think about it.” Profile photo: Nox the tiercel peregrine, Cal Falcons class of '24, photographed by Billy Thein (California Raptor Center).

infosec.exchange

The security hill I will die on: Credit for the “backdoored compiler” trick should go to Karger and Schell (“Multics Security Evaluation: Vulnerability Analysis,” 1974).¹ That’s the “Unknown Air Force Document” from which Thompson (1984) borrowed the idea.
__
¹ https://www.acsac.org/2002/papers/classic-multics-orig.pdf, §3.4.5

www.acsac.org
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