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I can think of ways, but I don't know how Skype does it. The client could have a local blacklist, they could only send hashes of URLs to a server, etc.
by drivebyacct2 13y ago
I can think of ways, but I don't know how Skype does it. The client could have a local blacklist, they could only send hashes of URLs to a server, etc.
- pwnna 13y agoCan you specify more details? Essentially my understanding is that you think it is possible to transmit something in plain text (encrypted but if a third party can decrypt it might as well be in plain text imo) over an untrusted network and ensure privacy.
- drivebyacct2 13y agoI just explained that. You and I have a secure P2P connection (aka Skype). But my client and your client check hashes of URLs against a third party service before transmitting the message to the other person. There, you can blacklist URLs and it doesn't send any message contents to anyone (only hashes of ONLY urls) and then sends the actual full message, encrypted on the wire. It's not hard to conceive how this system would work.