# Sanborn 2025: Open letter to the Kryptos community announcing the sale of K4

> Jim Sanborn, 2025. 2 records on Mysteries Department cite it. Sanborn's own statement of the sale and its purpose.

Source: https://mysteriesdept.com/sources/SRC0D7HSY1M1982/open-letter-to-the-kryptos-community-announcing-the-sale-of  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[Kryptos](https://mysteriesdept.com/mysteries/kryptos)Sanborn 2025

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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.

**Kryptos** ManuscriptChecked against the original0

## What it's used for here

Sanborn's own statement of the sale and its purpose.

## Cited by on this site 2 records

[Sanborn's open letter announces the sale of the K4 solution](https://mysteriesdept.com/mysteries/kryptos/events/EVT0D7HT6TW01PY/sanborns-open-letter-announces-the-sale-of-the-k4-solution)

EVT

[Kryptos](https://mysteriesdept.com/mysteries/kryptos)

The mystery article

MYS

## 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
```

[Read it free at elonka.com](https://www.elonka.com/kryptos/OpenLetterAug2025.html)

Key

**SRC** 0D7HSY1M1982

Kind

Manuscript

Rights

The publisher's

Checked

Against the published original

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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[CSL-JSON](https://mysteriesdept.com/sources/SRC0D7HSY1M1982/open-letter-to-the-kryptos-community-announcing-the-sale-of/csl.json)