Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.
  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?
    New to Twitter?
    Sign up
marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

Tweets

Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

Tweets

  • © 2021 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Imprint
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list

    Under 100 characters, optional
    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. Diego Elio Pettenò‏ @flameeyes 24 Jan 2020
      • Report Tweet
      • Report NetzDG Violation

      So if I'm right, there's only 8 bytes that are used for encryption key in the Libre 2 protocol. 64-bit is not much for a key. Are they just using DES? I have the cyphertext, and what I _think_ is the correct cleartext. What's my best option to figure this out?

      3 replies 0 retweets 1 like
      Show this thread
    2. Diego Elio Pettenò‏ @flameeyes 24 Jan 2020
      • Report Tweet
      • Report NetzDG Violation

      @hanno @FiloSottile @marcan42 @angealbertini I'm willing to learn more about cryptography to figure this out. Any suggestion that is shorter than an university course? :)

      1 reply 0 retweets 1 like
      Show this thread
    3. hanno‏ @hanno 24 Jan 2020
      • Report Tweet
      • Report NetzDG Violation
      Replying to @flameeyes @FiloSottile and

      well, if it's DES (and with 64 bit it's probably either that or some self-cooked vigenere cipher or something like that) then it's likely one of the five traditional encryption modes. if you have the key you can try them all.

      2 replies 0 retweets 0 likes
    4. Diego Elio Pettenò‏ @flameeyes 25 Jan 2020
      • Report Tweet
      • Report NetzDG Violation
      Replying to @hanno @FiloSottile and

      So I'm now trying to replay the capture and turns out they do seem to use something more clever than I expected. Even if I send the same 64 bit from a capture, the device sends over a different message, with what looks like two separate 64 bit values that are different.

      1 reply 0 retweets 0 likes
    5. Hector Martin‏ @marcan42 25 Jan 2020
      • Report Tweet
      • Report NetzDG Violation
      Replying to @flameeyes @hanno and

      CBC mode, a random IV and one block? That would be pretty common.

      1 reply 0 retweets 0 likes
    6. Hector Martin‏ @marcan42 25 Jan 2020
      • Report Tweet
      • Report NetzDG Violation
      Replying to @marcan42 @flameeyes and

      If you know it's DES and the exact mode and don't have the key, you can crack the key for $30 at http://crack.sh . might get a bit pricy if you're guessing the format/parameters though.

      1 reply 0 retweets 0 likes
    7. Diego Elio Pettenò‏ @flameeyes 25 Jan 2020
      • Report Tweet
      • Report NetzDG Violation
      Replying to @marcan42 @hanno and

      Unfortunately I can only _guess_ it's DES. What I have is (at least) 64-bit sent Host→Device and at least 2×64-bit sent Device→Host right now. I was trying to set up a second VM just to see if the parts I see constants are really constant, or generated at install.

      1 reply 0 retweets 0 likes
    8. This Tweet is unavailable.
      Hector Martin‏ @marcan42 25 Jan 2020
      • Report Tweet
      • Report NetzDG Violation
      Replying to @Birdfly_tw @flameeyes and

      Securekeybox, the WhiteCryption nonsense? Because I can pull keys out of those. Whitebox crypto is snake oil.

      5:14 AM - 25 Jan 2020
      1 reply 0 retweets 0 likes
        1. New conversation
        1. Michail‏ @MichailG 25 Jan 2020
          • Report Tweet
          • Report NetzDG Violation
          Replying to @marcan42 @Birdfly_tw and

          Isn’t that like saying obfuscation in general is snake oil? Its trivial to renew and high effort to reverse.

          1 reply 0 retweets 0 likes
        2. Hector Martin‏ @marcan42 25 Jan 2020
          • Report Tweet
          • Report NetzDG Violation
          Replying to @MichailG @Birdfly_tw and

          My experience says otherwise. You look at the thing once for a few hours and you can automate breaking it forever. It's snake oil because they actually sell it as basically unbreakable.

          2 replies 0 retweets 1 like
        3. Show replies

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2021 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Imprint
        • Cookies
        • Ads info