Timeline for Is a new block cipher harder to design than a new hash?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 1, 2018 at 0:40 | vote | accept | Paul Uszak | ||
| Apr 5, 2018 at 17:43 | history | edited | Ella Rose | CC BY-SA 3.0 |
added link to SIMD
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| Apr 5, 2018 at 17:43 | comment | added | Ella Rose | @PaulUszak If you're hashing using a sponge construction, making it one way is trivial: Just chop of part of the state and you're done. It's far from a huge difficulty. Similarly for a block cipher, it is only computable forward/backwards with the key, because of the steps that involve the key. SIMD means single-instruction-multiple-data, I amended the answer to link to a definition. | |
| Apr 5, 2018 at 16:34 | comment | added | Paul Uszak | PS. What a SIMD? | |
| Apr 5, 2018 at 16:34 | comment | added | Paul Uszak | I'm surprised that in your answer you don't attribute huge difficulties specifically for the invertable requirement for a cipher. I really thought that going one way only was significantly easier than one way and occasionally backwards too. Ta. | |
| Apr 5, 2018 at 2:44 | history | answered | Ella Rose | CC BY-SA 3.0 |