x

Three jobs, three tools

Three jobs, three tools

Three-panel comparison of compression shrinking file size, encryption turning plaintext into ciphertext with a key, and hashing producing a fixed-length digest.

Computers transform data for three main reasons: to make it smaller, to keep it secret, or to check it has not changed. Those goals are handled by compression, encryption and hashing.

Compression, Encryption and Hashing Lesson

  1. AS Level
  2. /Computer Science
  3. /Compression, Encryption and Hashing

Step-by-step lessons covering OCR AS Level Computer Science Compression, Encryption and Hashing for AS Level Computer Science. Each lesson works through exam-style questions.

Lessons