🪙Cryptography

What is Cryptography?

• Encryption and decryption of data (medium – difficult)

• Encoding and decoding of data (easy - medium)

For beginner challenge, normally there no coding and advance understanding needed to get the flag. The challenge appear to be like base, Caesar cipher or rot13, Vigenère and ascii.

Acid or Base

RlNFQ1NTe2I0NTNfNjRfMTVfZnVufQ==

This is base64. The pattern (==) and the question mention about 32x2 which 64. Decode using cyberchef.

FLAG : FSECSS{b453_64_15_fun}

ROT13

SFRPFF{e0gng3_13_g1z35}

The title and question about rot13. Let decode it using rot13 cyberchef.

FLAG : FSECSS{r0tat3_13_t1m35}

Left or Right

NAMKAA{piqt_bpm_kimaiz}

What that means??. I really don’t have idea. Since it mention rot13. Let bruteforce it using cyber chef.

FLAG : FSECSS{hail_the_caesar}

XEH

This question give image file which appear to be hexadecimal format. Let convert it into ascii to figure out the flag. I use from hex in cyberchef

FLAG : FSECSS{h3x4d3c1m4l}

Dance

Given a file with image inside. We need to decode it. Using tools to decode the symbol.

FLAG : FSECSS{Letsdance}

Vigenère

PWCMWQ{x0x_r00_r4vb}

The question mention about Vigenère and key. Let decode it using cyber chef with the key given.

FLAG : FSECSS{n0t_t00_h4rd}