Timeline for SHA-256 security for initial 32 bits
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
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| Sep 2, 2020 at 19:29 | history | edited | kelalaka | CC BY-SA 4.0 |
polished
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| Jul 7, 2020 at 10:57 | history | edited | kelalaka | CC BY-SA 4.0 |
polish
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| Jun 17, 2020 at 8:17 | history | edited | CommunityBot |
Commonmark migration
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| May 24, 2020 at 15:17 | history | edited | kelalaka | CC BY-SA 4.0 |
polish
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| Mar 30, 2020 at 9:01 | comment | added | Maximilian Kraus | Why is it that the attacker only has to search for the initial 32bits in order to find a valid output for the outer hash? That would only make sense to me, if the first 32bits of the hash output depend solely on the first 32bits of the input (which is obviously not true). How would the behavior change if the structure of the outer hash would be SHA-256(public || - || secret)? | |
| Mar 30, 2020 at 8:58 | comment | added | Maximilian Kraus | Thank you for your perseverance, first of all :) Wouldn't candidate secret be the already hashed random 16 bytes? The way you wrote it in your answer suggests the attacker tries to find candidate secret, then hashes it, adds the public suffix and hashes again. Also 16 bytes does not add up to the bit-wise explanation you gave (16*8 = 128bit, candidate secret is 256bit in your illustration). So those two parts of your answer don't match? | |
| Mar 29, 2020 at 21:14 | history | edited | kelalaka | CC BY-SA 4.0 |
added 192 characters in body
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| Mar 29, 2020 at 20:52 | comment | added | kelalaka | @MaximilianKraus better now? You can delete unnecessary comments. | |
| Mar 29, 2020 at 20:49 | history | undeleted | kelalaka | ||
| Mar 29, 2020 at 20:49 | history | edited | kelalaka | CC BY-SA 4.0 |
added 24 characters in body
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| Mar 29, 2020 at 20:44 | history | deleted | kelalaka | via Vote | |
| Mar 29, 2020 at 20:44 | history | edited | kelalaka | CC BY-SA 4.0 |
added 24 characters in body
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| Mar 29, 2020 at 20:39 | history | undeleted | kelalaka | ||
| Mar 29, 2020 at 20:33 | history | deleted | kelalaka | via Vote | |
| Mar 29, 2020 at 19:15 | history | edited | kelalaka | CC BY-SA 4.0 |
polish
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| Mar 29, 2020 at 18:18 | history | edited | kelalaka | CC BY-SA 4.0 |
the values are in hex that makes 32
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| Mar 29, 2020 at 18:05 | history | edited | kelalaka | CC BY-SA 4.0 |
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| Mar 29, 2020 at 17:56 | history | answered | kelalaka | CC BY-SA 4.0 |