Word game extra points

This are the words:

1. Insecure
2. Key management
3. Security
4. Operator
5. Computational
6. Prime factor
7. Recover
8. Accomodate
9. Cancellation
10. Transposition
11. Chiper
12. break
13. Splitting
14. Eavesdropping
15. Structure
16. Xor
17. Prime
18. Identity
19. Generator
20. Alphabet
21. One way function
22. Login
23. Subgroup