I need a cryptographer

Status: Closed
Prize: $275
Entries Received: 10

Contest Brief

I need help figuring out the encryption technology used. I have the encryption key, just do not know the cipher used. The first person to post the correct answer wins.

The encryption key as pulled from the system - 90|243|63|133|230|21|195|125|173|249|168|78|251|9|208|31
The encrypted string - NIrQMMouQp4BSIcRh622fg==

The decrypted string starts with a 4 and is all numbers. AND IS 9 DIGITS LONG

If there is a winner, the winner will be offered a freelance job.

UPDATE ---
Here is a new string with results. If you can tell me what decryption/cipher you used to recreate the same results, and I can reproduce the results, you will win.

Unecrypted String = 123456789
Encrypted = dpuY83svYbHnw1HVfNVByg==
Key = 90|243|63|133|230|21|195|125|173|249|168|78|251|9|208|31

The key is the same as before.

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Top entries from this contest

techxp23 India

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psabbala1990 India

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mudimudimudi Pakistan

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mudimudimudi Pakistan

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pickydesigner Bangladesh

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Soumya747 India

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grommedia Ukraine

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RSKushwah01 India

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mudimudimudi Pakistan

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Public Clarification Board

Cobot
- 9 months ago
#extended
- 9 months ago
mayanktrivedivw
- 10 months ago
Please check my entry. IF more explanation needed or code is needed I can update it accordingly
- 10 months ago
xSomoy
- 10 months ago
Dear Contest Holder Cody,

I apologize for not being able to submit my entry on time due to a power outage in my area.
I noticed that none of the other contestants have provided you with a satisfactory solution. I kindly request you Reconsider my entry #20,
I would appreciate it if you could give me a chance to present you with the solution.
- 10 months ago
1. xSomoy
  - 10 months ago
  How to reconsider a rejected entry : https://www.freelancer.com/support/employer/contest/how-to-rate-comment-on-and-reject-contest-entries
  - 10 months ago
2. xSomoy
  - 10 months ago
  I have a POC of my solution. As soon as I get a word from you. I would be happy to demonstrate. Thank You.
  - 10 months ago
xSomoy
- 10 months ago
#extended
- 10 months ago
xSomoy
- 10 months ago
Dear Contest Holder,
Please do not close the contest before time.
- 10 months ago
xSomoy
- 10 months ago
So much time, and sleepless nights. my back started hurting. But I'm gonna solve it. whatever it takes.
My hungry for challenges are never-ending.
- 10 months ago
RafaelBassan
- 10 months ago
I tryied with many encryption algorithims (DES, AES, Blowfish) but none of then get the data decrypted. Maybe there is a diversisfication algorithim or a seed / IV that is missing?
- 10 months ago
Contest Holder
- 10 months ago
I have extended the contest. Please review the update to the details of the contest.
- 10 months ago
1. xSomoy
  - 10 months ago
  Thank you very much for extending the time. And providing more information.
  You are such a great person.
  - 10 months ago
xSomoy
- 10 months ago
Check Out: #20
My expertise is in cryptography. The string was not only base64 encoded but also encrypted with a secret key that you supplied. Most people overlooked the encryption step and assumed it was just a simple encoding.
The encryption technology used in this case is complex and requires a thorough guide. However, this cannot be done in a Contest Entry due to the limited time and space.
I have set up a GitHub repository to share the real-time progress of this project. You can access it and learn about the encryption method that is used here.
The Github repo link is here.

https://github.com/xSomoy/Crypto-Decode
- 10 months ago
xSomoy
- 10 months ago
Check Out: #20
- 10 months ago
AbhishekEG
- 10 months ago
#18 Please provide more details about the encryption method
- 10 months ago
xSomoy
- 10 months ago
Dear Contest Holder,
Please let us know if you know the answer so we can partially hide the result. if nessesary.
Thank you.
- 10 months ago
Desec
- 10 months ago
I thought about it, the length of the plaintext can only be 8 or 16, unless some things are discarded during the calculation
- 10 months ago
RSKushwah01
- 10 months ago
please check my entry
- 10 months ago
Contest Holder
- 10 months ago
The decrypted string is 9 digits long.
- 10 months ago
1. i4m2o
  - 10 months ago
  Was this encryption used in a specific software, system, or protocol? If so, what is it?
  How was the encryption key generated? Was it derived from a password, randomly generated, or based on some other information?
  Is there any other information or metadata associated with the encrypted string or key?
  - 10 months ago
mudimudimudi
- 10 months ago
Based on the information provided, it is difficult to identify the specific encryption technology used without further context or clues. There are numerous encryption algorithms and ciphers available, each with different properties and characteristics.

If you can provide any additional information, clues, or context regarding the encryption technology used, I'll be happy to assist you further in determining the cipher.
- 10 months ago