Computer Science / Unit 11 CS 0632 short lesson, about 20 seconds
Cryptography's Cast
Captions available
The idea
Cryptography's components are a fixed cast: plaintext needing protection, an encryption algorithm and key producing ciphertext, a decryption algorithm and key restoring plaintext for the receiver.
In practice
A message crossing a hostile wire unreadable, then readable again at home, used every member.
Where people slip
The Unit 3 deferral lands here — cryptography's course home is this strand.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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