# How far do the 24 released letters constrain K4? · Kryptos > Three answers have been proposed. None is ahead on the evidence yet. Three are still possible. Source: https://mysteriesdept.com/mysteries/kryptos/questions/QST0D7HT89R1MSZ/how-far-do-the-24-released-letters-constrain-k4 Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) Updated: 2026-10-26T11:57:50+00:00 --- **0** # How far do the 24 released letters constrain K4? Asked 26 Oct 2026 by [**apollo** ](https://mysteriesdept.com/u/apollo)·Part of [What kind of cipher is K4?](https://mysteriesdept.com/mysteries/kryptos/questions/QST0D7HT81Y2GZY/what-kind-of-cipher-is-k4)·3 answers·0·0 following **Three answers, none ahead** None is ahead yet. See what would settle it. ## Where it stands Three answers have been proposed. None is ahead on the evidence yet. Three are still possible. ## Why it matters EAST NORTHEAST at 22 to 34 and BERLIN CLOCK at 64 to 74 are the only known plaintext; every test of a method runs against them⁠[[1]](https://mysteriesdept.com/sources/SRC0D7HT0FR2C4N/kryptos)⁠[[2]](https://mysteriesdept.com/sources/SRC0D7HSXST3N01/cryptodiagnosis-of-kryptos-k4). ## Answers 3 [**None of these.** ](https://mysteriesdept.com/mysteries/kryptos/answers/ANS0D7HTFCA0R82/none-of-these) Not tested enough to call either way Evidence: none yet Still possible [**The cribs, with the K1 to K3 systems and the tableau, are enough in principle to identify the method by…** ](https://mysteriesdept.com/mysteries/kryptos/answers/ANS0D7HTE587SN9/the-cribs-with-the-k1-to-k3-systems-and-the-tableau-are) Not tested enough to call either way Evidence: 1 for Still possible [**Without the method's extra elements (a key from Sanborn's life, a physical device, or the Berlin clock…** ](https://mysteriesdept.com/mysteries/kryptos/answers/ANS0D7HTEMW5QBE/without-the-methods-extra-elements-a-key-from-sanborns-life) Not tested enough to call either way Evidence: 2 for Still possible ## History 1. 2014[Schwartz: sanborn said in 2014 that solvers should 'delve into that particular clock'.](https://mysteriesdept.com/sources/SRC0D7HSX2C1WJ0/sculptor-offers-another-clue-in-24-year-old-mystery-at-c-i-a)For: Without the method's extra elements (a key from Sanborn's life, a physical device, or the Berlin clock… 1. 2021[Bean puts forward: the cribs, with the K1 to K3 systems and the tableau, are enough in principle to identify the method by…](https://mysteriesdept.com/sources/SRC0D7HSXST3N01/cryptodiagnosis-of-kryptos-k4) 1. 2021[Bean: bean's tests extract structure from the cribs strong enough to favour some families over others.](https://mysteriesdept.com/sources/SRC0D7HSXST3N01/cryptodiagnosis-of-kryptos-k4)For: The cribs, with the K1 to K3 systems and the tableau, are enough in principle to identify the method by… 1. 2025[Vergano puts forward: without the method's extra elements (a key from Sanborn's life, a physical device, or the Berlin clock…](https://mysteriesdept.com/sources/SRC0D7HSZRA00RT/artist-releases-final-clues-to-solve-cia-kryptos-puzzle) 1. 2025[Vergano: sanborn's 2025 clues point to the World Clock, a 1986 trip to Egypt and the fall of the Berlin Wall.](https://mysteriesdept.com/sources/SRC0D7HSZRA00RT/artist-releases-final-clues-to-solve-cia-kryptos-puzzle)For: Without the method's extra elements (a key from Sanborn's life, a physical device, or the Berlin clock… 1. 26 Oct 2026Asked on this site ## Discussion 0 [Add to the discussion](https://mysteriesdept.com/signin?next=/mysteries/kryptos/questions/QST0D7HT89R1MSZ/how-far-do-the-24-released-letters-constrain-k4%23discussion) Help with this question [ **Propose an answer** Something the evidence could support or rule out ] [ **Propose an answer** Something the evidence could support or rule out ](https://mysteriesdept.com/signin?next=/mysteries/kryptos/questions/QST0D7HT89R1MSZ/how-far-do-the-24-released-letters-constrain-k4%23add-answer) [ **Add evidence** A result for or against an answer ] [ **Add evidence** A result for or against an answer ](https://mysteriesdept.com/signin?next=/mysteries/kryptos/questions/QST0D7HT89R1MSZ/how-far-do-the-24-released-letters-constrain-k4%23add-evidence) [ **Ask a sub-question** A smaller question that would help settle this one ] [ **Ask a sub-question** A smaller question that would help settle this one ](https://mysteriesdept.com/signin?next=/mysteries/kryptos/questions/QST0D7HT89R1MSZ/how-far-do-the-24-released-letters-constrain-k4%23add-question) [ **Add a source** A paper, archive record or image ] [ **Add a source** A paper, archive record or image ](https://mysteriesdept.com/signin?next=/mysteries/kryptos/questions/QST0D7HT89R1MSZ/how-far-do-the-24-released-letters-constrain-k4%23add-source) Where it fits Kryptos [**What kind of cipher is K4?** ](https://mysteriesdept.com/mysteries/kryptos/questions/QST0D7HT81Y2GZY/what-kind-of-cipher-is-k4)Key question · most likely k4 uses a Gromark-type cipher (a keyed alphabet with a running numeric key generated by chain addition) or a… **How far do the 24 released letters constrain K4?** You're here · 3 answers, inconclusive [ Ask a question under this one ]