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Cryptography

Tools Used

  • RapidTables
    • https://www.rapidtables.com/web/tools/index.html
      • Base64
      • Binary
      • Hex String
  • Cryptii
    • https://cryptii.com/
    • Decode
  • Decode
    • https://www.dcode.fr/
    • RSA Cipher
  • Kali Linux
    • Strings

##Challange 1 Using rapidtables I was able to decode the encoded strings. The first string was a hexadecimal string. I ommited the 0x and pasted the remaining string into the deocoder. 0x73636f7270696f6e scorpion The decoded string is scorpion.

I then proceeded to the next string. The string is a base64 string. I then pased that into the decoder. c2NyaWJibGU scribble The decoded string is scribble.

The next string was a binary string. 01110011 01100101 01100011 01110101 01110010 01100101 01101100 01111001 securely The decoded string is securely.

The last string was a double encoded string. Original word was first encoded into a base64 and then that base64 was encoded into a binary string. I first decoded the binary to reveal the base64 and then decoded the base64 to reveal the original string. 01100010 01000111 00111001 01110011 01100010 01000111 01101100 01110111 01100010 00110011 01000001 00111101 bG9sbGlwb3A= lollipop The decoded string is lollipop.

Challange 2

Using crpytii I took the encrpyred string and decoded it using a ceaser cipher with a shift of 13. I used the Large Language Model Gemma to aid in my decription. The model was able to tell me the most logical cipher based on the encoding. iveghny ynxr virtual lake The decoded string is virtual lake.

Challange 3

Using cryptii and gima I was able to determine that the cipher is a alphabetical substituion using the alphabet in reverse. hzuvob lyerlfh xzev safely obvious cave The decoded string is safely obvious cave.

Challange 4

Based on the ... and the -- I was able to determine this was morse code. I used crpytii to convert the string. .... . / ... . -.-. .-. . - / --- ..-. / --. . - - .. -. --. / .- .... . .- -.. / .. ... / --. . - - .. -. --. / ... - .- .-. - . -.. / ... -.- -.-- / -.. -.- ...- -... / ----. ---.. .---- -.... the secret of getting ahead is getting started sky dkvb 9816 The decoded string is the secret of getting ahead is getter strated sky dkvb 9816.

Challange 5

The notes for this challange is that there were handwritten notes with 3 & 5. Using this information I looked for ciphers on cryptii where the numbers could be insterted and keys. I was able to figure out this was a Rail Cipher. 3 correlated to the first message and 5 the second. Cair eruSA-0org sgaeudrpesr K-II98.ue cn seYQ3 Courage is grace under pressure SKY-AIQI-9380. The deconded first string is Courage is grace under pressure SKY-AIQI-9380. F daS-eefn n KZ3eheadty.YI8lta oiwy-Q0. r aI2 Feel the fear and do it anyway. SKY-IQIZ-3802. The decoded second string is Feel the fear and do it anyway. SKY-IQIZ-3802.

Challange 6

The notes for this challange was that the keyword is qizkwcgqbs. The let me to a vigenere cipher because it uses a key. Using cryptii and the keyword I was able to decipher the phrase. Y ln xkv lubj swlzqvkht, A vmzb pjk bbua we ddgs ILQ-GQYU-8026 I do not fear computers, I fear the lack of them SKY-QIZK-8026 The decrypted string is I do not fear computers, I fear the lack of them SKY-QIZK-8026.

Challange 7

For this challange I used Kali Linux. The provided file had a string encoded into it. I first tried looking through the metadata and through steghide. The strign was hidden in the strings metadata of the file. Using the following command strings Step1.jpg | grep SKY I was able to pull tjust the string I needed out of the file. SKY-TVJI-2063 The decoded string is SKY-TVJI-2063.

Challage 8

This challange is decoding a string using RSA. I used dcode.fr and their RSA decrypter to decipher the text. The provided values were N, C, and E. I was then able to use that to pull P adn Q from dcode. Then With that I was able to decode the string. C is the encoded string. n = 1079 e = 43 c = 996 894 379 631 894 82 379 852 631 677 677 194 893 p = 13 q = 83 SKY-KRYG-5530 The decoded string is SKY-KRYG-5530.

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