Cipher comparisons "X vs Y"

Caesar vs Vigenère — which cipher fits which job?

Julius Caesar's cipher (-50) and Vigenère's (1586) belong to two distinct families — monoalphabetic and polyalphabetic — separated by 16 centuries of evolution. A no-nonsense comparison.

ROT13 vs Atbash — two "self-inverse" ciphers compared

ROT13 (shift of 13) and Atbash (alphabet mirror) share a rare property: applying them twice returns the plaintext. Twenty-six centuries separate them — one masks a spoiler, the other was the tool of Hebrew scribes.

Caesar vs ROT13 — what's the difference, really?

ROT13 *is* a Caesar cipher — with a shift hard-coded at 13. So the real question isn't "which is stronger?" but "why give a special case its own name?". Answer: for a singular property that changes everything.

Pigpen vs Templar — two "symbol" ciphers compared

Pigpen (18th century, freemasons) and the Templar cipher (12th–14th centuries, Order of the Temple) each replace letters of the alphabet with geometric glyphs. Same family, two radically different aesthetics.

One-time pad vs Vigenère — why one is breakable and the other is not

The one-time pad (Vernam, 1917) and Vigenère (1586) rely on exactly the same mechanics — shift each plaintext letter by a key letter. Yet one is mathematically unbreakable, the other falls in a few hours. A single difference separates them.