CyberChef VS Ciphey

Then we take the encrypted text and use CyberChef to decrypt it.

Let's go to CyberChef and insert our pieces of evidence.

A parameter was changed from '2AMBCgIQBg' to 'CgIIAdgDAQ%3D%3D' which is just the correct base64 encoding they should have been using the entire time.

I don't think this was a hostile action by Google, I think someone just added better input validation for security reasons and it accidently broke the bad requests they were sending.

https://gchq.github.io/CyberChef/#recipe=URL_Decode()From_Ba...

❗This is indeed the flag, but the text is encrypted with Base64. Usually, the presence of padding character "=" indicates that's Base64 type of encoding (but that's only one of the hints). To decrypt it, we can use CyberChef. Copy-paste the text and we either:

It uses a combination of magic bytes (like the `file` command), entropy analysis and character frequency detection to determine whether an output is likely to be of interest to the user.

The file type mechanism is written here[0]. There's a list of all signatures we detect here[1].

[0] https://github.com/gchq/CyberChef/blob/master/src/core/lib/F...

I think this can be deciphered using CyberChef...

I also discovered Ciphey. Neat little tool indeed, but it's being deprecated. It's mentioned in this issue[1] and being replaced with Ares[2]. Neither could decipher this strange encryption[3] I used it on :(

[1] https://github.com/Ciphey/Ciphey/issues/764

[2] https://github.com/bee-san/Ares

[3] "dEFLWWFKQWxRQW16RnkvbTZML0lsdz09" original text is "hacker"

Check Ciphey, I have used several times before and overall it’s great. https://github.com/Ciphey/Ciphey

It can help you detect various encryption and encodings and even decrypt them. Ciphey

I followed the steps here . I am running Python 3.10 (64). When I try to install Ciphey using the instructions, on my cmd prompt I get the following:

repo: https://github.com/Ciphey/Ciphey

if you're looking for something that would decrypt most well-known encodings/ciphers, there's ciphey. but no such thing exists to decrypt every known file type because, if it did, everyone would be using it.