1. ## Cryptography

Hello everyone....I wonder if someone can help me with a cryptography problem, I tried for days and I ran out of ideas
A company with 3 buildings, 3 floors on each building and 3 offices on each floor receive a mail from one building's administration. The mail contains the text: "6654150363 3603 065727121557 605403425772366603 7+2 390354602715 6+28" and the image below. What is the message before encoding? Hint: frequency

WhatsApp_Image_2024-03-04_at_22.05.39_cb6dc962.jpg

2. To solve this cryptography problem, we need to decode the given message using the hint "frequency." The hint suggests that the solution involves analyzing the frequency of numbers or patterns.

Let?s break down the problem step by step:

1. Analyze the Encrypted Message
The message is:

yaml
Copy code
6654150363 3603 065727121557 605403425772366603 7+2 390354602715 6+28
2. Interpretation of the Hint
Since the hint is "frequency," it suggests that we should look at the frequency of characters or numbers. We will need to identify patterns or convert the numbers into something meaningful.

3. Break Down the Components
Let?s look at the different parts of the message:

6654150363
3603
065727121557
605403425772366603
7+2
390354602715
6+28
4. Frequency Analysis
First, let?s convert each numeric block into letters using a common cipher technique, like mapping numbers to letters. In many cases, numbers can be mapped to letters where A = 1, B = 2, ..., Z = 26. But given the complexity of the message, we might need to use a different approach.

Convert the Numbers to Letters
Let's see if converting the numbers to letters based on the frequency might reveal something.

Convert Using A=1, B=2, ... Z=26:

This approach might work if the numbers fit within the 1 to 26 range. However, the numbers given are much larger.

Frequency Patterns:

Another approach is to use the frequency of the numbers directly or apply a common cipher such as a substitution cipher.

5. Analyze Specific Patterns and Simple Substitutions
Here?s a structured way to approach the problem using frequency analysis:

Examine the frequency of each number:

Count how often each digit appears in the string.

Apply Known Ciphers or Decryptions:

Check if there is a pattern or if common ciphers such as Caesar cipher, Vigen?re cipher, or simple substitution ciphers apply.

6. Check Common Decoding Techniques
Convert Each Block Individually:

For blocks like 6654150363, you could try splitting the numbers in different ways and see if they correspond to any letters or common words.

Combine Numbers and Simple Mathematical Operations:

For parts with mathematical operations like 7+2 and 6+28, perform the calculations to get numbers and then convert them to letters.

Practical Steps to Decode
Perform Mathematical Operations:

7+2 = 9
6+28 = 34 (since 34 is not a valid letter index, this could be part of another step or cipher technique)
Apply Frequency Analysis:

Check the frequency of numbers and map them to letters if possible.

Example of Applying Frequency Analysis
6654150363 might be analyzed by seeing if segments or patterns correspond to letters or words.
After applying the above techniques, if you still encounter difficulties, the exact decryption might involve a more specific method or cipher technique used by the company.

Final Steps
Given that the hint is "frequency," focus on identifying patterns or repetitions in the numbers and translating them based on common cipher techniques. If the approach above does not yield results, consider consulting additional resources or cryptography tools to assist with frequency analysis.

If you have any additional information or specific methods used by the company, it could provide further clues to solving the message.

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