Links from 2023-04-23

PSA: upgrade your LUKS key derivation function

So, in these days of attackers with access to a pile of GPUs, a purely computationally expensive KDF is just not a good choice. And, unfortunately, the subject of this story was almost certainly using one of those. Ubuntu 18.04 used the LUKS1 header format, and the only KDF supported in this format is PBKDF2. This is not a memory expensive KDF, and so is vulnerable to GPU-based attacks. But even so, systems using the LUKS2 header format used to default to argon2i, which is memory strong, but not designed to be resistant to GPU attack . New versions default to argon2id, which is. You want to be using argon2id.

What makes this worse is that distributions generally don’t update this in any way. If you installed your system and it gave you pbkdf2 as your KDF, you’re probably still using pbkdf2 even if you’ve upgraded to a system that would use argon2id on a fresh install.

Tagged as: , , , | Author:
[Montag, 20230424, 05:00 | permanent link | 0 Kommentar(e)

Comments are closed for this story.


Disclaimer

„Leyrers Online Pamphlet“ ist die persönliche Website von mir, Martin Leyrer. Die hier veröffentlichten Beiträge spiegeln meine Ideen, Interessen, meinen Humor und fallweise auch mein Leben wider.
The postings on this site are my own and do not represent the positions, strategies or opinions of any former, current or future employer of mine.

Me, Elsewhere

Tag Cloud

2007, 2blog, 2do, 2read, a-trust, a.trust, a1, accessability, acta, advent, age, ai, amazon, ankündigung, apache, apple, audio, austria, backup, barcamp, basteln, bba, big brother awards, birthday, blog, blogging, book, books, browser, Browser_-_Firefox, bruce sterling, buch, bürgerkarte, cars, cartoon, ccc, cfp, christmas, cloud, coding, collection, command line, commandline, computer, computing, concert, conference, copyright, covid19, css, database, date, datenschutz, debian, delicious, demokratie, design, desktop, deutsch, deutschland, dev, developer, development, devops, digitalks, dilbert, disobay, dna, dns, Doctor Who, documentation, Domino, domino, Douglas Adams, download, downloads, drm, dsk, dvd, e-card, e-government, e-mail, e-voting, E71, education, Ein_Tag_im_Leben, elga, email, encryption, essen, eu, event, events, exchange, Extensions, fail, fedora, feedback, film, firefox, flash, flightexpress, food, foto, fsfe, fun, future, games, gaming, geek, geld, git, gleichberechtigung, google, graz, grüne, grüninnen, hack, hacker, handtuch, handy, hardware, HHGTTG, history, how-to, howto, hp, html, humor, ibm, IBM, ical, iCalendar, image, innovation, intel, internet, internet explorer, iot, iphone, ipod, isp, IT, it, itfails, itfailsAT, itfailsDE, java, javascript, job, jobmarket, journalismus, keyboard, knowledge, konzert, language, laptop, law, lego, lenovo, life, links, linux, Linux, linuxwochen, linuxwochenende, live, living, lol, london, lost+found, Lotus, lotus, Lotus Notes, lotus notes, lotusnotes, LotusNotes, lotusphere, Lotusphere, Lotusphere2006, lotusphere2007, lotusphere2008, Lotusphere2008, lustig, m3_bei_der_Arbeit, mac, mail, marketing, mathematik, media, medien, metalab, microsoft, Microsoft, mITtendrin, mobile, mood, motivation, movie, mp3, multimedia, music, musik, männer, nasa, nerd, netwatcher, network, netzpolitik, news, nokia, notes, Notes, Notes+Domino, office, online, OOXML, open source, openoffice, opensource, orf, orlando, os, outlook, patents, pc, pdf, performance, perl, personal, php, picture, pictures, podcast, politics, politik, pr, press, presse, privacy, privatsphäre, productivity, programming, protest, public speaking, qtalk, quintessenz, quote, quotes, radio, rant, recherche, recht, release, review, rezension, rip, rss, science, search, security, server, settings, sf, shaarli, Show-n-tell thursday, sicherheit, silverlight, smtp, SnTT, social media, software, sony, sound, space, spam, sprache, spö, ssh, ssl, standards, storage, story, stupid, summerspecial, sun, surveillance, sysadmin, talk, talks, technology, The Hitchhikers Guide to the Galaxy, theme, think, thinkpad, thunderbird, tip, tipp, tools, topgear, torrent, towel, Towel Day, TowelDay, travel, truth, tv, twitter, ubuntu, ui, uk, unix, update, usa, usb, vds, video, videoüberwachung, vienna, vim, Vim, vintage, vista, vorratsdatenspeicherung, vortrag, wahl, wcm, web, web 2.0, web2.0, web20, Web20, webdesign, werbung, wien, wiener linien, wikileaks, windows, windows 7, wired, wishlist, wissen, Wissen_ist_Macht, wlan, work, workshops, wow, writing, wtf, wunschzettel, Wunschzettel, www, xbox, xml, xp, zensur, zukunft, zune, österreich, övp, übersetzung, überwachung

AFK Readinglist