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Author Archives: yurkennis

U2F devices: backdoors possible?

Posted on October 17, 2018 by yurkennis

Following the recent post at ZDNet on Google Titan devices designed and manufactured by a Chinese vendor and potentially prone to built-in backdoors: is it even theoretically possible to inject a backdoor on a U2F device, giv… Continue reading U2F devices: backdoors possible?→

Posted in backdoor, u2f

Telegram: Security risks for a user of using third-party socks5 proxy?

Posted on April 16, 2018 by yurkennis

If a user decides to use a third-party SOCKS5 proxy for his Telegram client, what are possible security risks for the user?

Specifically if the proxy suggests using the same login and password for anyone signing up (eg).

In… Continue reading Telegram: Security risks for a user of using third-party socks5 proxy?→

Posted in instant messaging, man-in-the-middle, proxy, socks5

Where can I use BLE/NFC U2F device?

Posted on March 10, 2017 by yurkennis

Can BLE U2F security keys used on Chrome for macOS/Windows for any site supporting U2F USB keys as a second factor?
What sites/apps can I use NFC/BLE U2F keys for on NFC-supporting Android smartphone?

Specifically interest… Continue reading Where can I use BLE/NFC U2F device?→

Posted in multi-factor, u2f | Tagged Bluetooth, NFC

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