March 2018
Intermediate to advanced
215 pages
5h 48m
German
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6Weitere Anwendungen und abschließende Betrachtungen zur Kryptografie
6.1Zeitstempel
Wir hatten mit den bisherigen Methoden die Vertraulichkeit, die Integrität und die Authentizität von Daten sicherstellen können. Aber bislang verhindert keine der betrachteten Maßnahmen, dass Daten abgefangen und wiederholt gesendet werden (Replay Attack).
Warum kann das ein Problem darstellen? Stellen wir uns vor, bei einem Großprozess in der chemischen Industrie wird die Temperatur eines Kessels („chemischer Reaktor“) geregelt. Dazu wird u. a. ein Datenpaket versendet, das „Erhöhe Kesseltemperatur um 3 Grad“ bedeutet.
Ein Unbefugter schneidet dieses Datenpaket mit und schickt es später erneut los, womöglich viele Male hintereinander. Die Solltemperatur im Kessel ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.