Timeline for Breaking the rotate-then-substitute alphabetic cipher
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Sep 20, 2017 at 10:55 | comment | added | Mark Wildon | Thank you! The entropy of the distribution of English characters (without space) is approximately $4.14$ bits per character, making the unicity distance for a character stream $\log_2 26! / (\log_2 26 - 4.14) \approx 158$ characters. So one can hope to decipher a cipher text of $158 \times 26$ characters. How much this can be shortened using your ideas is an interesting question. | |
| Sep 20, 2017 at 9:32 | vote | accept | Mark Wildon | ||
| Sep 14, 2017 at 22:57 | history | answered | kodlu | CC BY-SA 3.0 |