Please enable JavaScript.
Coggle requires JavaScript to display documents.
CRYPTOGRAPHY, A monoalphabetic cipher is a basic substitution cipher where…
-
A monoalphabetic cipher is a basic substitution cipher where each letter is replaced by another letter based on a fixed rule. It's a simple and weak encryption method as the same substitution is used consistently throughout the message, making it vulnerable to frequency analysis.
-
-
-
-
-
The row transportation cipher, also known as columnar transposition, rearranges characters of a message by writing them into a grid and permuting columns based on a key. The encrypted message is formed by reading the grid's columns sequentially. It's a relatively weak encryption method and can be easily broken using modern techniques.
-
1)Write the plaintext row by row into a grid, filling the cells sequentially:
H E L L O
W O R L
D _
Placeholder "_" is used to occupy the empty cells.
-
2)Rearrange the columns of the grid based on the alphabetical order of the letters in the key "LIME":
-
-
-
3)Read the grid column by column from left to right, top to bottom:
Ciphertext: "EWLHDLOO LR"
-
-
-