Switched to Xfce4 Desktop

Why?

Got tired of KDE, plus that KDE replaced my custom splash screen with its default one, I then decided to configure Xfce4 as my main DE for at least the next month

How does it look?

  • Here is my screenshot:

    xfce4 screenshot

  • Have to admit, Xfce4 consumes little system resources, and …

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Cryptography - Week 1

TL; DR

  • Sym. encryption
  • One Time Pad
  • Shannon: Perfect secrecy
  • History - Badly broken algorithms
  • Stream cipher - OTP in real life
  • Probability basics
  • Pseudo random gen - predictable
  • Negligible / Non-negligible

Topics

Sym. encryption definition

What

  • Sender and receiver use the same secret key for encryption and decryption,
  • or the same encryption scheme …

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