Caesar Cipher
In cryptography, a Caesar cipher, also known as the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques.
Fountain Gate Secondary College
Fountain Gate Secondary College
Within the Victorian Digital Technology Curriculum, students learn to: investigate how data is transmitted and secured in wired and wireless networks including the internet VC2TDI8S02
Here we will explore a simple cryptography method called the Caesar Cipher which is an encryption method used to hide information in plain sight by turning it into secret code (similar to how data is transmitted securely over the internet). This keeps things like private messages and passwords safe from spying eyes.
In cryptography, a Caesar cipher, also known as the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques.
Frequency analysis is a way to crack secret codes by counting how often each letter shows up. In English, some letters like E, T, A, and O appear a lot, while others like Z, Q, and X don’t. If a specific letter shows up heaps in a secret message, it’s probably an 'E'!
A Caesar Cipher wheel is a tool used to encrypt and decrypt letters. It has two alphabet circles that spin or "shift". To decrypt a message by a shift of 2, you would rotate the inner disk to so that 'A' lines up with 'C'.
Decrypt the 5 messages below to reveal a special combination lock code for the secret box!
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z