Hashing, checksums, compression and encryption in the storage and transfer of data

What this note covers

1. Four techniques, four different jobs
2. Hashing: one-way fingerprints and password storage
3. Checksums, parity and error detection
4. Compression: lossless, lossy and when each is safe
5. Putting the four together in a data exchange
6. Exam technique: identify, explain, recommend

6 sections · 10 key terms & formulas · 6 common mistakes