• Cocodapuf@lemmy.world
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    1 day ago

    Since when was sms ever secure? My understanding is that messages are sent in the clear, meaning your carrier and the recipient’s carrier both have the opportunity to intercept messages.

    I mean that’s the message content, not the authentication, but still, sms is the opposite of secure, always has been.

    • brie@programming.dev
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      24 hours ago

      Not true. SMS is encrypted in 3G, LTE, 5G. Block cyphers like Kasumi and A/9 are used. SMS is reasonably secure, because it’s hard to infiltrate telecom systems like S7

      • john89@lemmy.ca
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        5 hours ago

        because it’s hard to infiltrate telecom systems like S7

        cough You can pay a few grand and get access to SS7 networks.

        Might be out of reach for most of us, but we can rest assured that any and all security firms and goverrnment agencies have access to this information at a moment’s notice.

        • brie@programming.dev
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          4 minutes ago

          Simply paying is not sufficient. You need to be a telecom company, or a researcher afaik.

          In what world would the US gov care to get into your bank account? Or your Facebook account when it’s already tightly controlled?

      • danA
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        18 hours ago

        it’s hard to infiltrate telecom systems like S7

        Telecom systems can be (and are) infiltrated though, which is what the FBI is warning about.

        SS7 is very insecure. See this video, too: https://www.youtube.com/watch?v=wVyu7NB7W6Y

        • brie@programming.dev
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          21 minutes ago

          Watch the video again to see how hard it was for Derrick to get access. He got it via his telecom/academia researcher contact.

      • Abnorc@lemm.ee
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        24 hours ago

        It’s hard, but not hard enough from what I’ve been able to gather. We should want something better IMO. I’m surprised that TOTP isn’t more common.

        • brie@programming.dev
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          23 hours ago

          S7 will be retired or extended with access control. TOTP apps don’t work for edge cases like broken phone. Dedicated token devices get lost. SMS will continue being the main solution for 2FA.

          • HotChickenFeet@sopuli.xyz
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            33 minutes ago

            You can use TOTP with multiple devices. For example with an app on your phone and something like KeePass on your laptop/desktop.

            Still not convenient since you don’t walk around with this in your pocket - but it doesn’t have to be just one point of failure.

            • brie@programming.dev
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              2 minutes ago

              What about people who only have one device? Kids, elderly, people with only work computer.

          • JasonDJ@lemmy.zip
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            7 hours ago

            Nah what we need is good privacy-focussed companies getting into the public IAM space.

            You know how you can sign into stuff with your Google or Facebook account? And get a 2FA push to your phone?

            Like that. Except by a company with a shred of ethics and morality. Like Proton.

            I do also think that we all should have a cryptographically secure federally issued identity for official uses such as signing documents or signing into financial accounts and other things that must use your official identity, and not an online pseudonym. Like SSN but on a smartcard. Basically CAC or ECA but for general civilian use.

            • brie@programming.dev
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              12 minutes ago

              Proton is already used for identity management: OTP via email. They’ll implement OAuth if there’s enough demand for it. A company’s purpose is to be profitable, ethics side is largely irrelevant.

              Many countries already have digital government ID: Australia, Estonia, Russia.