Timeline for What would make it impossible to deny that decryption of a package has taken place?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Jun 23, 2014 at 1:50 | comment | added | D.W. | package? What do you mean by that? Do you mean packet? | |
| Nov 30, 2013 at 11:55 | comment | added | Henrick Hellström | Well, clearly you have to report something to the party that will reveal the hidden unit. Would a distributed commitment scheme that doesn't reveal any information about the players but might be verified when the game ends help? | |
| Nov 30, 2013 at 9:28 | comment | added | Kristoffer la Cour | I've been suggested looking into e-coins before, but could, as you said, not find anything that allows me to stay on one client. I've also been suggested linked timestamping, but that as well requires that you report in to another party... | |
| Nov 30, 2013 at 9:08 | comment | added | Henrick Hellström | Your example suggests that your problem is similar to the problem of e-cash: How do you spend any of your electronic coins, in such way that it is impossible for you to keep a copy of the same coin and spend it again later? I don't think this can be done completely on one client, without some sort of commitment that are stored in multiple locations. | |
| Nov 29, 2013 at 18:44 | history | edited | e-sushi | CC BY-SA 3.0 |
Converted title into question.
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| Nov 29, 2013 at 16:22 | history | tweeted | twitter.com/#!/StackCrypto/status/406458052255424512 | ||
| Nov 29, 2013 at 14:21 | comment | added | Kristoffer la Cour | I tried to add a use case that might help you understand what I'm trying to do. | |
| Nov 29, 2013 at 14:21 | history | edited | Kristoffer la Cour | CC BY-SA 3.0 |
added 223 characters in body
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| Nov 29, 2013 at 13:40 | history | edited | e-sushi | CC BY-SA 3.0 |
Added "reference-request" and "zero-knowledge-proof" tags, killed the chit-chat. (nice question btw.)
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| Nov 29, 2013 at 7:06 | comment | added | Henrick Hellström | Please be more specific. Do you want a receipt that the user has read a license agreement and approved it (use certificates and a digital signature of "[license] I approve [name]", or do you need confirmation that the software has automatically performed a few simple steps (cf e.g. crypto.stackexchange.com/questions/9497/…)? | |
| Nov 29, 2013 at 0:37 | comment | added | hunter | I don't think this is strictly possible with crypto alone... it's more of a software/protocol problem. If you can assume that the server only delivers the data to be decrypted once the user has been authenticated, and that decrypting the data is trivial (ie, that particular user has the key to decrypt it), then it's probably safe to say that the data has been decrypted by that user, meaning that the server can make a note of it's retrieval/decryption. Vaguely related are time-sensitive crypto questions here and here. | |
| Nov 28, 2013 at 23:53 | review | First posts | |||
| Nov 29, 2013 at 6:02 | |||||
| Nov 28, 2013 at 23:52 | history | edited | Kristoffer la Cour | CC BY-SA 3.0 |
edited title
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| Nov 28, 2013 at 23:34 | history | asked | Kristoffer la Cour | CC BY-SA 3.0 |