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Time Travelers
The Past and Future existing at the same time?
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<blockquote data-quote="MODAT7" data-source="post: 241776" data-attributes="member: 13649"><p>CRC's don't work like that. They are a complex mathematical algorithm that is one way only. If you have a CRC and want to "reverse" it to get the file back, you have to do a brute force attack. That means starting from 0, feeding each byte through the algorithm, and counting up until the CRC matches. A small text file of 1000 characters could be a mathematical number of 256^1000. Limiting the characters to text related only would shrink that quite a bit, but it would still be a huge number. If trying to retrieve a small image, it would take more computational time (dozens of years) than the lifespan of your computer would last.</p><p></p><p>If the guy really did something time related with his computer, it was something else... maybe connected to external hardware to help out.</p></blockquote><p></p>
[QUOTE="MODAT7, post: 241776, member: 13649"] CRC's don't work like that. They are a complex mathematical algorithm that is one way only. If you have a CRC and want to "reverse" it to get the file back, you have to do a brute force attack. That means starting from 0, feeding each byte through the algorithm, and counting up until the CRC matches. A small text file of 1000 characters could be a mathematical number of 256^1000. Limiting the characters to text related only would shrink that quite a bit, but it would still be a huge number. If trying to retrieve a small image, it would take more computational time (dozens of years) than the lifespan of your computer would last. If the guy really did something time related with his computer, it was something else... maybe connected to external hardware to help out. [/QUOTE]
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The Past and Future existing at the same time?
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