Browsing Category
Cryptography
36 posts
Cryptography is the process of hiding or coding information so that only the person a message was intended for can read it. The art of cryptography has been used to code messages for thousands of years and continues to be used in bank cards, computer passwords, and ecommerce.
Advanced Encryption Standard (AES): Complete Guide to Encryption, Modes, and Security
If you’ve ever wondered what’s actually happening when your browser shows that little padlock icon, or how your…
Playfair Cipher in Cryptography: Encryption, Decryption, and Implementation Guide
I still remember the first time I worked through the Playfair cipher by hand — there’s something genuinely…
Hacking Monoalphabetic Cipher: Cryptanalysis Techniques and Frequency Analysis Attack
I like to describe the monoalphabetic substitution cipher as cryptography’s “first lesson in humility.” It looks deceptively strong…
Monoalphabetic Cipher in Cryptography: Substitution Techniques and Examples Explained
When I first started digging into classical cryptography, the monoalphabetic cipher was the very first technique I sat…
Vigenère Cipher in Cryptography: Polyalphabetic Encryption and Decryption Guide
I remember the first time I understood why the Vigenère cipher was called “le chiffre indéchiffrable” — the…
Decryption of a Transposition Cipher: Step-by-Step Guide with Examples
I’ve noticed that most articles about transposition ciphers spend almost all of their time on encryption and treat…
Transposition Cipher in Cryptography: Columnar, Rail Fence, and Route Ciphers Explained
Long before computers existed, people needed ways to hide the meaning of messages from prying eyes. One of…
ROT13 Algorithm in Cryptography: Caesar Cipher Variant and Implementation Guide
Among the many simple ciphers studied in introductory cryptography, few are as instantly recognizable and widely used in…
Reverse Cipher in Cryptography: Simple Encryption Technique and Implementation
Not every cipher needs to involve complicated mathematics to illustrate a core cryptographic idea. The Reverse Cipher is…
Block Cipher Modes of Operation: ECB, CBC, CFB, OFB, CTR, and GCM Explained
A block cipher, on its own, only knows how to do one thing: transform a single fixed-size block…