Cryptography· 10 posts
How to Identify Unknown Cipher Types in CTF Challenges
Learn systematic techniques for identifying unknown cipher types in CTF competitions. Master frequency analysis, Index of Coincidence, pattern recognition, and other methods to quickly categorize and break encoded messages.
AES vs Classical Ciphers: Why Modern Encryption Actually Works
Understand why AES is unbreakable while Caesar cipher fails instantly. Learn the fundamental differences between classical and modern encryption, and why proper cryptography matters for real security.
Classical Ciphers Explained: From Caesar to Enigma
Explore the evolution of classical cryptography from ancient Caesar ciphers to the legendary Enigma machine. Learn how each cipher works, their historical significance, and why understanding them matters for modern security.
What is the difference between RSA and ECDSA certificates?
Understand RSA vs ECDSA encryption, compare certificate strengths, and choose the right algorithm for your security needs.
Is ROT13 Encryption Secure? When Should You Use It?
Discover why ROT13 offers zero security for sensitive data, when it's appropriate to use this simple cipher, and which modern encryption algorithms you should use instead for real protection.
ROT13 Explained: How It Works and Why It's Not Encryption
What ROT13 actually does, how it relates to Caesar cipher, where it's still used today, and why calling it 'encryption' is technically wrong.
How to Decode ROT13 Text
Learn why decoding ROT13 is identical to encoding, how the self-reciprocal property works mathematically, and practical methods for decoding ROT13 text manually or with tools.
Can ROT13 Encrypt Numbers and Special Characters?
Discover what ROT13 can and cannot transform, why standard ROT13 only affects letters, and explore variants like ROT5, ROT47, and ROT18 that extend transformation to numbers and symbols.
Caesar Cipher vs ROT13: Understanding the Key Differences
Explore the relationship between the Caesar cipher and ROT13, how they differ in implementation and security, and why both remain relevant for teaching cryptography fundamentals today.
Why is XOR used in cryptography if it's insecure?
Understand XOR's role in cryptography despite its security limitations, when it's appropriate, and why it persists in modern systems.