Ibn ad-Durayhim's treatise on cryptanalysis. 2026-02-15T20:15:33+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from session cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Ibn ad-Durayhim, Ali ibn Muhammad, 1312-1361 (Series on Arabic origins of cryptology, 2004)