Caesar Box Code Example

TSDETHSIRWEWSIIPOBNCAREGE → 25 characters

Find the square root: Square root of 25 is 5.

Split letters into 5 rows of 5 letters each:

TSDET  HSIRW  EWSII  POBNC  AREGE

Now stack them:

T S D E T\\
H S I R W\\
E W S I I\\
P O B N C\\
A R E G E\\

Read from top to bottom starting at the top left corner and finishing at the bottom right corner.

Translation: “The password is ‘Bee,’ ring twice”