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Open letter to the Kryptos community announcing the sale of K4
Jim Sanborn, 2025. Mirrored on elonka.com, 14 August 2025.
Sanborn explains why he will auction the K4 plaintext in November 2025: tens of thousands of letters and emails, AI-generated decrypts, age and money. Hopes the buyer will keep K4 secret and says its riddle will persist as K5.
What it's used for here
Sanborn's own statement of the sale and its purpose.
Cited by on this site 2 records
Kryptos
MYSThe mystery article
Cite it
Sanborn, J. (2025). Open letter to the Kryptos community announcing the sale of K4. Mirrored on elonka.com, 14 August 2025. https://www.elonka.com/kryptos/OpenLetterAug2025.html
@unpublished{sanborn2025openletter,
author = {Sanborn, Jim},
title = {Open letter to the Kryptos community announcing the sale of K4},
howpublished = {Mirrored on elonka.com, 14 August 2025},
year = {2025},
url = {https://www.elonka.com/kryptos/OpenLetterAug2025.html}
}TY - GEN TI - Open letter to the Kryptos community announcing the sale of K4 AU - Sanborn, Jim PY - 2025 JO - Mirrored on elonka.com, 14 August 2025 UR - https://www.elonka.com/kryptos/OpenLetterAug2025.html ER -
Sanborn, Jim. “Open letter to the Kryptos community announcing the sale of K4.” Mirrored on elonka.com, 14 August 2025 (2025).