# Is the 2020 decryption of Z340 the true message? · Zodiac ciphers > Three answers have been proposed. The Oranchak, Blake and Van Eycke decryption is the message the writer enciphered. leads, with evidence 4 for, 1… Source: https://mysteriesdept.com/mysteries/zodiac-ciphers/questions/QST0D71PE6E3RE4/is-the-2020-decryption-of-z340-the-true-message Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) Updated: 2026-10-26T11:59:10+00:00 --- **0** # Is the 2020 decryption of Z340 the true message? Asked 26 Oct 2026 by [**apollo** ](https://mysteriesdept.com/u/apollo)·3 answers·0·0 following **Answered: The Oranchak, Blake and Van Eycke decryption is the message the writer enciphered.** Passed its tests and review. ## Where it stands Three answers have been proposed. The Oranchak, Blake and Van Eycke decryption is the message the writer enciphered. leads, with evidence 4 for, 1 against: supported by its tests. Two are still possible. Of the one narrower question under it, none is answered yet. ## Why it matters Z340 drew more false solutions than any other modern cipher. The 2020 reading is now treated as settled, and the grounds for that should be on the record⁠[[1]](https://mysteriesdept.com/sources/SRC0D71P64M215H/the-solution-of-the-zodiac-killers-340-character-cipher)⁠[[2]](https://mysteriesdept.com/sources/SRC0D71P6CE73Y3/unicity-distance-of-the-zodiac-340-cipher). ## Answers 3 [**The Oranchak, Blake and Van Eycke decryption is the message the writer enciphered.** ](https://mysteriesdept.com/mysteries/zodiac-ciphers/answers/ANS0D71PF5P4ZMP/the-oranchak-blake-and-van-eycke-decryption-is-the-message) Supported by its tests Evidence: 4 for, 1 against Most likely [**An earlier claimed solution (Graysmith, Penn and others) is correct and the 2020 reading is a coincidence.** ](https://mysteriesdept.com/mysteries/zodiac-ciphers/answers/ANS0D71PGMJ5JDY/an-earlier-claimed-solution-graysmith-penn-and-others-is) Failed a test; not refuted outright Evidence: 1 against Disputed [**None of these.** ](https://mysteriesdept.com/mysteries/zodiac-ciphers/answers/ANS0D71PH4656TG/none-of-these) Failed a test; not refuted outright Evidence: none yet Disputed ## History 1. 2023[von zur Gathen: the unicity distance of the full system is at most 152 characters, well below 340.](https://mysteriesdept.com/sources/SRC0D71P6CE73Y3/unicity-distance-of-the-zodiac-340-cipher)For: The Oranchak, Blake and Van Eycke decryption is the message the writer enciphered. 1. 2024[Oranchak et al. puts forward: the Oranchak, Blake and Van Eycke decryption is the message the writer enciphered.](https://mysteriesdept.com/sources/SRC0D71P64M215H/the-solution-of-the-zodiac-killers-340-character-cipher) 1. 2024[Oranchak et al. puts forward: an earlier claimed solution (Graysmith, Penn and others) is correct and the 2020 reading is a coincidence.](https://mysteriesdept.com/sources/SRC0D71P64M215H/the-solution-of-the-zodiac-killers-340-character-cipher) 1. 2024[Oranchak et al.: the placement of LIFE IS and the row-15 shift are the solvers' corrections, not features read directly off…](https://mysteriesdept.com/sources/SRC0D71P64M215H/the-solution-of-the-zodiac-killers-340-character-cipher)Against: The Oranchak, Blake and Van Eycke decryption is the message the writer enciphered. 1. 2024[Oranchak et al.: a key derived from the first nine transposed rows maps all 63 symbols with no conflicts and reads the rest,…](https://mysteriesdept.com/sources/SRC0D71P64M215H/the-solution-of-the-zodiac-killers-340-character-cipher)For: The Oranchak, Blake and Van Eycke decryption is the message the writer enciphered. 1. 2024[Oranchak et al.: earlier claims used anagramming or free rearrangement; the FBI found none with merit over 51 years.](https://mysteriesdept.com/sources/SRC0D71P64M215H/the-solution-of-the-zodiac-killers-340-character-cipher)Against: An earlier claimed solution (Graysmith, Penn and others) is correct and the 2020 reading is a coincidence. 1. 26 Oct 2026Asked on this site ## Discussion 0 [Add to the discussion](https://mysteriesdept.com/signin?next=/mysteries/zodiac-ciphers/questions/QST0D71PE6E3RE4/is-the-2020-decryption-of-z340-the-true-message%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/zodiac-ciphers/questions/QST0D71PE6E3RE4/is-the-2020-decryption-of-z340-the-true-message%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/zodiac-ciphers/questions/QST0D71PE6E3RE4/is-the-2020-decryption-of-z340-the-true-message%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/zodiac-ciphers/questions/QST0D71PE6E3RE4/is-the-2020-decryption-of-z340-the-true-message%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/zodiac-ciphers/questions/QST0D71PE6E3RE4/is-the-2020-decryption-of-z340-the-true-message%23add-source) Where it fits Zodiac ciphers **Is the 2020 decryption of Z340 the true message?** Key question · you're here [What are the last 18 letters of Z408?](https://mysteriesdept.com/mysteries/zodiac-ciphers/questions/QST0D71PEXW0XFF/what-are-the-last-18-letters-of-z408)Most likely · the tail is filler, copied from symbols above, to make the third section match the other two in size [ Ask a question under this one ]