3 ms·
One time pads[1] are an effective and cheap measure. Certain privileged diplomatic luggage (not exactly sure of the protocols) cannot be searched by the host co
by dclusin 7y ago
One time pads[1] are an effective and cheap measure. Certain privileged diplomatic luggage (not exactly sure of the protocols) cannot be searched by the host country. You can bring them to your embassies on a regular basis.
1 -https://en.wikipedia.org/wiki/One-time_pad https://en.wikipedia.org/wiki/One-time_pad
- toxik 7y agoOr just set up an OTP then use the OTP to send new OTPs securely, boom.
- theamk 7y agoIf you do this, it is no longer OTP.
- jancsika 7y agoI think it still is: 1. Alice and Bob set up their OTP 2. Alice randomly generates a new OTP 3. Alice encrypts the new OTP with the original OTP and sends the ciphertext to Bob 4. Bob decrypts... the new OTP 5. Alice and Bob burn the original OTP 6. Now Alice and Bob have a copy of the new OTP I mean, it's pointless. But I don't see how it isn't secure.
- theamk 7y agoFor those who do not know exactly how OTP works: jancsika is right in the sense that this is possible, but meaningless. The reason for that is that in OTP, you use your key ("pad") for every transmission, in 1-to-1 ratio to amount of data being transmitted. And you can only use your key once (hence "one time pad") So let's say you brought 1000 MB of OTP keys to embassy in diplomatic mail, you can use it to send up to 1000 MB of encrypted data, and then you have to get a new one. If you are low on OTP keys, and you use it to send a new one, you'll have to spend 100 MB of "old" OTP keys to get 100 MB of "new" OTP keys -- entirely pointless process, as amount of unused key data won't change.
- jancsika 7y agoOn the other hand, if Alice and Bob are just constantly sending each other these messages as a pointless exercise, the traffic they generate by doing so would technically make the exercise rise above the level of pointlessness. :)