How to Solve Cryptogram Puzzles — Complete Strategy Guide

A cryptogram is a message encoded by substituting each letter with a different letter or symbol. The same substitution applies throughout the message. Every A might become X, every E might become Q. Your job is to reverse-engineer the substitution by analyzing patterns.

Start with Letter Frequency

In English, the most frequent letters are E, T, A, O, I, N, S, H, R, in roughly that order. In a cryptogram of sufficient length, the most frequently occurring cipher letter is almost certainly E. The second most frequent is likely T or A. This gives you an immediate starting point.

Single-Letter Words

There are only two common single-letter words in English: A and I. Any single-letter word in the cryptogram is almost certainly one of these two. Try each and see which produces valid two-letter combinations with adjacent words.

Common Two-Letter Patterns

The most common two-letter words are: OF, TO, IN, IS, IT, BE, AS, AT, SO, WE, HE, BY, OR, ON, DO, IF, ME, MY, AN, UP, NO. When you have decrypted A or E, look for two-letter combinations and match them to this list to identify additional letters.

Word Endings and Beginnings

Common endings: -THE, -ING, -ION, -ED, -ER, -LY, -EST. Common beginnings: THE-, AND-, FOR-, WIT-, NOT-. When you have identified a few letters, these patterns allow rapid expansion of your known alphabet.