The Caesar cipher | Journey into cryptography | Computer Science | Khan Academy
Why the open web links it
Explains the Caesar cipher and how it was broken using frequency analysis.
Linked by 8 independent sites, 3 of them widely read in the 2026-10 crawl of the open web, including nextcloud.com, sciencealert.com, haikudeck.com, athenaproject.tech, bournetocode.com.