Skip to content
  • Home Home Home, current page.
  • Moments Moments Moments, current page.

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
RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

Tweets

Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

Tweets

  • © 2018 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • 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. Norman‏ @NormanShamas Jul 27

      Norman Retweeted Norman

      Maybe I should expand on what I mean with this. Secure messaging apps like WhatsApp and Signal are becoming normalized, which is fantastic! However, they have issues with privacy (and potentially safety) based on phone numbers as unique IDshttps://twitter.com/NormanShamas/status/1022179143889313792 …

      Norman added,

      Norman @NormanShamas
      Does anyone have thoughts on ways to improve UX for connecting people who haven't met each other on secure messaging apps that use phone numbers (like @signalapp)? Is this a design pattern that people have looked at?
      1 reply 1 retweet 3 likes
      Show this thread
    2. Norman‏ @NormanShamas Jul 27

      While I know that there are other secure messaging apps that don't use phone numbers as ID, behavior change and getting people to adopt new apps is hard. WhatsApp already has a huge market share globally

      1 reply 0 retweets 0 likes
      Show this thread
    3. Norman‏ @NormanShamas Jul 27

      The ability to securely connect people who don't know each other in a way that can protect phone numbers becomes an important feature to have for safety and privacy.

      1 reply 0 retweets 0 likes
      Show this thread
    4. Norman‏ @NormanShamas Jul 27

      Norman Retweeted Russell Brandom

      Example 1: Signal/WhatsApp number for a journalist tip-linehttps://twitter.com/russellbrandom/status/1022180345276506112 …

      Norman added,

      Russell BrandomVerified account @russellbrandom
      Replying to @NormanShamas @signalapp
      There’s a real tradeoff in discoverability vs. identifiability too. The tip-line number has to be public, but you better hope no one finds any metadata with that number in it.
      1 reply 0 retweets 0 likes
      Show this thread
    5. Norman‏ @NormanShamas Jul 27

      Example 2: A mutual friend wants to connect two friends who don't know each other. In a case like this, it can be easier to introduce a less secure element, like SMS

      1 reply 0 retweets 0 likes
      Show this thread
    6. Norman‏ @NormanShamas Jul 27

      Example 3: Two people meet online and want to have a secure, less public conversation. Sharing phone numbers can reveal information (such as current or past location) that someone does not want to share

      1 reply 0 retweets 0 likes
      Show this thread
    7. Norman‏ @NormanShamas Jul 27

      I am sure there are more examples. Without refactoring the app to have non-phone numbers as unique IDs, are there any design patterns that people have researched?

      1 reply 0 retweets 0 likes
      Show this thread
    8. Erinn Atwater‏ @errorinn Jul 27
      Replying to @NormanShamas

      only solution i knowhttps://medium.com/@mshelton/using-signal-without-giving-your-phone-number-3a575580f652 …

      2 replies 0 retweets 1 like
      Rich Felker‏ @RichFelker Jul 27
      Replying to @errorinn @NormanShamas

      And it's not really a good solution because in almost all cases, either there's a trail linking the number back to you, or someone else can hijack the number and you have no recourse.

      12:02 PM - 27 Jul 2018
      • 1 Retweet
      • 1 Like
      • Norman
      1 reply 1 retweet 1 like
        1. New conversation
        2. Erinn Atwater‏ @errorinn Jul 27
          Replying to @RichFelker @NormanShamas

          i've been able to get a free number with textnow using tor and a throwaway email address. the hijacking thing is certainly still a problem but it's outside many ppls' threat models

          1 reply 1 retweet 2 likes
        3. Norman‏ @NormanShamas Jul 27
          Replying to @errorinn @RichFelker

          Hijacking is definitely of concern for activists and journalists though. There are examples of that already being done in the US against activists with real phone numbers through social engineering of telcoms

          1 reply 0 retweets 2 likes
        4. Erinn Atwater‏ @errorinn Jul 27
          Replying to @NormanShamas @RichFelker

          i've successfully social engineered my own number away from my telco as a test :(

          2 replies 0 retweets 0 likes
        5. Norman‏ @NormanShamas Jul 27
          Replying to @errorinn @RichFelker

          Probably a reason secure messaging apps shouldn't be using phone numbers as a unique ID. But that's another conversation...

          0 replies 0 retweets 0 likes
        6. End of conversation

      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

        • © 2018 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Cookies
        • Ads info