Današnja pitanja o pitanjima i odgovorima daju nam zahvaljujući SuperUser, podjela Škole razmjene, zajednice-driven grupiranje Q & A web stranica.
Pitanje
SuperUser čitač Naughty.Coder želi znati:
Packets travel through internetworks, and take many routes through internet routers. On each route that forwards traffic to another until reaching the ultimate destination, what stops them from viewing the packets they receive/forward?
Sada ne kažemo da postoji korelacija između njegovog korisničkog imena i njegove znatiželje o ljudima koji njuškaju svoje pakete, ali to je definitivno naša omiljena kombinacija SuperUser korisničkog imena / pitanja do danas.
Odgovor
SuperUser Kwaio pruža uvid:
Short answer: you can’t prevent them from sniffing your traffic, but you can make it meaningless for them by using encryption.
Either use encrypted protocols (HTTPS, SSH, SMTP/TLS, POP/TLS, etc.) or use encrypted tunnels to encapsulate your unencrypted protocols.
For example, if you use HTTPS instead of HTTP, the content of the webpages you fetch will not be readable from those routers.
But remember that they can still save the encrypted packets and try to decrypt them. Decryption is never about “can or can’t”, it’s about “How much time does it take”. So use ciphers and key lengths suitable for the degree of privacy you need, and the “expiration time” of the data you want to “hide”. (meaning if you don’t care if someone gets it a week after the transmission, use a strong protocol. If it’s an hour, you can lower the key length)
Ako je to pitanje i odgovor parqued vaše znatiželja o zaštiti vaše komunikacije, preporučujemo da malo uvodnom čitanju: VPN vs SSH tunel: Koji je sigurniji? i zašto većina web usluga ne koristi End-to-End Encryption.
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