| Issue | Solution |
|---|---|
| Privacy | Encryption |
| Modification, Replacement, Spoofing | Authentication |
| System (not user) Trust | DNSSEC |
Proprietary O/Ss might be better documented, but not always correctly. This can be very frustrating. The Linux kernel is getting to be much better documented, and the source is the most authoritative. If something is broken, it can be fixed.