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Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture

ID: 002badf3-cd44-5c38-baaf-8929a52120e2

STIX ID: report--002badf3-cd44-5c38-baaf-8929a52120e2

Feed Name: Schneier on Security

Date Published: 2025-08-21

Date Updated: 2026-04-19

Author: Bruce Schneier

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A post reports that artist Jim Sanborn is auctioning the original handwritten plaintext for the Kryptos sculpture’s Part Four (K4) along with related cryptology materials via RR Auction on Nov. 20, with an estimated $300,000–$500,000 sale price; Sanborn prefers a buyer who will keep the solution secret and possibly manage solution-verification inquiries.

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