Timeline for How do you prove the age of a time capsule?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 13, 2022 at 21:57 | comment | added | Kevin Kostlan | @ZeissIkon: The whole point of one way functions is that there is no way to go backwards, i.e. no way to generate a message from a hash code. Or at least much harder to do so (but is it hard enough? With technology of the future?). | |
| Oct 13, 2022 at 11:08 | comment | added | Zeiss Ikon | Actually, it only proves the hash code is X years old. The message might have been generated yesterday from a 90 (or 900) year old "hash code" found in a published source. | |
| Oct 13, 2022 at 5:41 | comment | added | towr | It only proves the message is X years old, but it might have been put in a new time capsule. | |
| Oct 13, 2022 at 0:16 | comment | added | Hearth | This of course becomes unreliable if someone finds a way to generate hash collisions for the hash function you chose at some point between burying the time capsule and unearthing it. If you could generate a collision, you can make a new message that hashes to the same value as the one put in the newspaper all those years ago. | |
| S Oct 12, 2022 at 18:59 | review | First answers | |||
| Oct 12, 2022 at 19:21 | |||||
| S Oct 12, 2022 at 18:59 | history | answered | Michael Donnelly | CC BY-SA 4.0 |