Utility software - Crossword

Clues

1. Process of converting data into secret coded format for protection (10)
2. Algorithm that scrambles and unscrambles data during encryption (6)
3. Reorganizing disk fragments so files are stored in sequence (15)
4. Files stored in noncontiguous disk sections causing slower access (13)
5. Utility that removes temporary and cached files freeing disk space (11)
6. Software that detects quarantines and removes malicious programs (9)
7. Compression preserving all original data for exact restoration (8)
8. Compression discarding some data to achieve smaller files (5)
9. Algorithm used to transform plaintext into unreadable ciphertext (6)
10. Secret value used to encrypt and decrypt data (3)
11. Filters network traffic and blocks unauthorized network access (8)
12. Creates copies of data for restoration after loss (6)