Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Kafin farkon karni na 20, cryptography ya fi damuwa da tsarin harshe da lexicographic. Tun daga wannan lokacin, an canza mahimmancin, kuma yanzu cryptography yana amfani da ilmin lissafi sosai, gami da fannoni na ka'idar bayanai, rikitarwa na lissafi, ƙididdiga, haɗuwa, algebra mai ban mamaki, ka'idar lamba, da ƙididdigar ƙididdiga gaba ɗaya. Cryptography ma wani reshe ne na aikin injiniya, amma wanda ba a saba gani ba tunda yana ma'amala da aiki, mai hankali, da adawa da mugunta (duba aikin injiniya na cryptographic da aikin injiniya na tsaro); sauran nau'ikan aikin injiniya (misali, aikin injiniya ko aikin injiniya) suna buƙatar ma'amala kawai da ƙarfin yanayi. Hakanan akwai bincike mai aiki wanda ke bincika alaƙar da ke tsakanin matsalolin ɓoyewa da kimiyyar lissafi (duba ƙididdigar ƙididdigar ƙididdiga da ƙididdigar ƙididdiga).  Tambaya: me ya canza tun daga lokacin??
Ƙarfafawa