Protecting a Network - Crossword

Clues

1. Authorised experts attempt to attack a system to find weaknesses before criminals do. (7)
2. Detects, blocks and removes malicious programs, and must be updated regularly to stay effective. (11)
3. Monitors network traffic and blocks connections that rules do not allow. (8)
4. Scrambles data into ciphertext so only someone with the correct key can read it. (10)
5. A weakness that an attacker could exploit, such as outdated software or poor input checking. (13)
6. Isolates a malicious file so it cannot run or spread to other files. (10)
7. A secret value used with an algorithm to scramble and unscramble data. (3)
8. A newer version of a program that fixes known weaknesses attackers could exploit. (14)