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Hi everyone, I found this challenge from PicoCTF more interesting than the others that I did so far so I decided to do a nicer video, or at least to try it. You have the link of the challenge in the description of the video. The description of the challenge says: I forgot Cookies can Be modified client-side so now I decided to encrypt them. And they give us a URL. If we send a get request, we see that it returns an amp;quot;authnameamp;quot; cookie. At a first glance it seems that the cookie is base64 encoded. We can save the value of the cookie in a variable. And then we can decode the cookie. Hmm it seems another base64 encoded string? letamp;#39;s decode it again Ah, this time it returns non-printable bytes, this shows that it should be encrypted most probably, and it makes sense based on the description of the challenge. Talking about the description of the challenge Did you noticed the small hint? See how certain letters are written in upper case. Ok, the
