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.

This is the legacy version of twitter.com. We will be shutting it down on June 1, 2020. Please switch to a supported browser, or disable the extension which masks your browser. You can see a list of supported browsers in our Help Center.

  • 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
colmmacc's profile
Colm MacCárthaigh
Colm MacCárthaigh
Colm MacCárthaigh
@colmmacc

Tweets

Colm MacCárthaigh

@colmmacc

AWS, Apache, Crypto, Irish Music, Haiku, Photography

Seattle
notesfromthesound.com
Joined April 2008

Tweets

  • © 2020 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. Moxie Marlinspike‏ @moxie Apr 10
      • Report Tweet
      • Report NetzDG Violation

      First look at Apple/Google contact tracing framework: 1) Once a day, your device derives a new key ("daily tracing key"). 2) It uses that to derive a new "proximity ID" every time your device's bluetooth address changes (15min), which is broadcast to nearby BT sensors. 1/10

      94 replies 2,447 retweets 4,955 likes
      Show this thread
    2. Moxie Marlinspike‏ @moxie Apr 10
      • Report Tweet
      • Report NetzDG Violation

      3) Your device keeps track of all "proximity IDs" it sees. 4) If someone tests positive, they choose to publish their (previously secretly) "daily tracing keys." 5) Your device frequently DLs all published daily tracing keys and KDFs to see if they match recorded proximity IDs.

      8 replies 53 retweets 301 likes
      Show this thread
    3. Moxie Marlinspike‏ @moxie Apr 10
      • Report Tweet
      • Report NetzDG Violation

      So first obvious caveat is that this is "private" (or at least not worse than BTLE), *until* the moment you test positive. At that point all of your BTLE mac addrs over the previous period become linkable. Why do they change to begin with? Because tracking is already a problem.

      11 replies 65 retweets 366 likes
      Show this thread
    4. Moxie Marlinspike‏ @moxie Apr 10
      • Report Tweet
      • Report NetzDG Violation

      So it takes BTLE privacy a ~step back. I don't see why all of the existing beacon tracking tech wouldn't incorporate this into their stacks. At that point adtech (at minimum) probably knows who you are, where you've been, and that you are covid+.

      8 replies 91 retweets 432 likes
      Show this thread
    5. Moxie Marlinspike‏ @moxie Apr 10
      • Report Tweet
      • Report NetzDG Violation

      Second caveat is that it seems likely location data would have to be combined with what the device framework gives you. Published keys are 16 bytes, one for each day. If moderate numbers of smartphone users are infected in any given week, that's 100s of MBs for all phones to DL.

      25 replies 48 retweets 242 likes
      Show this thread
    6. Moxie Marlinspike‏ @moxie Apr 10
      • Report Tweet
      • Report NetzDG Violation

      That seems untenable. So to be usable, published keys would likely need to be delivered in a more 'targeted' way, which probably means... location data.

      12 replies 36 retweets 298 likes
      Show this thread
      Colm MacCárthaigh‏ @colmmacc Apr 10
      • Report Tweet
      • Report NetzDG Violation
      Replying to @moxie

      This could go the same way as the daily keys; terrible for infected folks, not as bad for others. Infected app users could disclose their location history, and others' apps could download the datasets for the locations they have visited (and some fake but credible locations).

      3:54 PM - 10 Apr 2020
      • 2 Likes
      • Moxie Marlinspike Deirdre Connolly¹
      0 replies 0 retweets 2 likes

      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

        • © 2020 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Imprint
        • Cookies
        • Ads info