Note that if the predicted event occurs less than six hours from now we should consider the possibility that Quirrell brought a time-turner with him when he fled the story.
If Quirrell has a time-turner it seems plausible the time cost required for finding SHA-1 collisions would be irrelevant and the entire method would be insecure.
If Quirrell has a time-turner it seems plausible the time cost required for finding SHA-1 collisions would be irrelevant and the entire method would be insecure.
Harry’s work suggest that time-turners respond poorly to being used for computational short-cuts.
Which, while it is cryptic, certainly gives us a strong indication about the expected success of time-travel computation.
(Without MoRverse) It reminds us to consider the implications of physics and the evident time travel mechanism. At the simplest level we can ask ourselves “What is more likely? We derive the right result or we get eaten by a black swan while trying?”
A consideration to make with respect to Harry’s experiment in particular is that what we discovered was only that it is more likely for Harry to panic than for Harry to solve that particular computational task via that method. Not enough to rule out some degree of shortcut taking but certainly enough to be rather careful when taking it to the extremes of brute force decryption.
Note that if the predicted event occurs less than six hours from now we should consider the possibility that Quirrell brought a time-turner with him when he fled the story.
If Quirrell has a time-turner it seems plausible the time cost required for finding SHA-1 collisions would be irrelevant and the entire method would be insecure.
Harry’s work suggest that time-turners respond poorly to being used for computational short-cuts.
Relevant.
Hmmmm. I thought the outcome of that experiment was more ambiguous than that- didn’t his attempt return a cryptic “Don’t mess with time travel”?
Which, while it is cryptic, certainly gives us a strong indication about the expected success of time-travel computation.
(Without MoRverse) It reminds us to consider the implications of physics and the evident time travel mechanism. At the simplest level we can ask ourselves “What is more likely? We derive the right result or we get eaten by a black swan while trying?”
A consideration to make with respect to Harry’s experiment in particular is that what we discovered was only that it is more likely for Harry to panic than for Harry to solve that particular computational task via that method. Not enough to rule out some degree of shortcut taking but certainly enough to be rather careful when taking it to the extremes of brute force decryption.
An excellent point.