Merge pull request #4513 from Pfed-prog/main

removed typo

topics/cryptography/index.md

@@ -6,4 +6,4 @@ topic: cryptography
 wikipedia_url: https://en.wikipedia.org/wiki/Cryptography
 ---
 
-Cryptography, or cryptology is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages.[
+Cryptography, or cryptology is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages.