The Row Column cipher is a simple transposition cipher that rearranges text using a matrix. The process involves writing the text row by row into a grid with a fixed number of columns (determined by the key), then reading it column by column to produce the encrypted text. For decryption, the process is reversed - the ciphertext is written column by column and read row by row. Imagine writing your message on a grid of paper, then reading it in a different direction. The security relies on the mixing up of character positions rather than substituting characters.