The Unbreakable Kryptos Code

An art installation known as Kryptos was inaugurated at CIA headquarters in late 1990. The main attraction was a curved copper screen inscribed with a secret message. Three-quarters of the code have since been broken, but the final segment has resisted all attempts at decipherment. This video chronicles the cracking of the first three segments and examines the many clues that may one day lead someone to decipher the fourth.

𝐂𝐫𝐞𝐝𝐢𝐭𝐬, 𝐫𝐞𝐟𝐞𝐫𝐞𝐧𝐜𝐞𝐬, 𝐚𝐧𝐝 𝐦𝐨𝐫𝐞
https://www.lemmi.no/p/the-unbreakable-kryptos-code

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𝐂𝐡𝐚𝐩𝐭𝐞𝐫𝐬
00:00 Intro
02:30 The Vigenère Table
05:45 Partial Decipherment of Kryptos
07:46 Identifying Ciphers Within the Code
11:09 Breaking K2
15:21 Breaking K3 and K1
17:49 The K1-K3 Plaintext
24:02 The Mystery of K4
27:21 The Intended Solutions
36:50 The IDBYROWS Mishap
39:56 The K4 Clues
41:44 Hypothetical Solutions to K4
45:45 Outro