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jviide in HowNetWorks

Nov 3, 2016

URI:teller & a Call for the Curious

Last friday we quietly rolled out a new service called URI:teller. When I say “quietly” I don’t…

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Ossi Herrala in HowNetWorks

Jan 10, 2017

How did I turn my Browser into a Port Scanner? Tricksy but doable

Modern web browsers are full of features. It’s possible to watch movies, listen to music, and make phone and video calls with just a few clicks. Some of these features can also be used for things not intended in the…

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Ossi Herrala in HowNetWorks

Nov 2, 2016

Don’t waste cycles with modulo bias!

TL;DR Use proper function to generate uniform random values (like arc4random_uniform()) instead of fighting against modulo bias yourself.

Today, after reading a blog post about generating random numbers in various programming languages, my…

Ossi Herrala in HowNetWorks

Oct 30, 2016

dnsnitch knows Your name servers, do you?

Almost every article about DNS tells it’s the “Internet’s Phonebook”. DNS translates human comprehensible names (like “medium.com”) into numeric IP addresses (“104.16.123.127”). DNS means Domain Name System and the servers are commonly called name servers…

jviide in HowNetWorks

Nov 21, 2016

URI:telegram

TL;DR: Update Telegram’s macOS clients to version 2.28 or newer. Earlier versions leak URLs from secret chats. NCSC-FI has released an…

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