Cryptoquotes puzzles are quotes from famous people that are encoded with new letters. For instance, all of the a's in the quote might become z's or another letter. The player must determine what the original letter was for each of the current letters in the quote to read it.
Many online websites provide this type of puzzle, including Razzlepuzzles.com and Cryptograms.org. Most of these games offer hints, such as the frequency that each letter appears in the puzzle and the name of the person who said it. In some cases, the hint appears without asking for it, while other websites hide the hints until requested.