CTFlearn-Writeups/Cryptography/Vigenere Cipher/README.md

33 lines
927 B
Markdown
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

## Vigenere Cipher
The main idea finding the flag is just having knowledge about Vigenere Cipher.
#### Step-1:
Its very easy if you have basic idea of Vigenere Cipher. If you don't know, please refer :
https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher
So this is what is given in the message of challenge:
```
The vignere cipher is a method of encrypting alphabetic text by using a series of interwoven Caesar ciphers based on the letters of a keyword.<br />
Im not sure what this means, but it was left lying around: blorpy
gwox{RgqssihYspOntqpxs}
```
#### Step-2:
One thing is important to know that Vigenere Cipher requires a <strong>key</strong> to decode any message.
I used this URL to decode my message and used given key as : `blorpy`
https://cryptii.com/
#### Step-3:
This was my output:
<img src="Flag.png">
That's it. That's our flag.
#### Step-4:
Finally the flag becomes:
`flag{CiphersAreAwesome}`