crypto - null

ØxOPOSɆC - Don Joe [Crypto]

Don Joe insists his site is as secure as can be! Can you prove that the best web dev of all time is wrong?" URL: https://don-joes-blog.herokuapp.com/ There are two flagsDon Joe's Blog has a very simple interface and lists only 4 blog posts: Clicking on the articles

crypto

ØxOPOSɆC | Underground Leaks (Crypto) - Part II

Write-up for the second part of the Underground Leaks saga, that includes DTMF and Multi-tap Cipher.

crypto

HTB Crypto Challenge | Call

Write-up for retired HTB crypto challenge that involves DTFM and Prime Numbers Cipher.

crypto

ØxOPOSɆC | Underground Leaks (Crypto)

Write-up for retired Oposec's October challenge

crypto

HTB Crypto Challenge | Bank Heist

Write-up for retired HTB crypto challenge that involves Multi-tap code and Atbash Cipher.

tap code

ØxOPOSɆC Summer Challenge 2020 | Crypto Challenges Write-up

Knock Knock (100)21 31 11 22 { 32 11 44 15 45 43 42 34 43 15 }If I had known about Tap Code (aka Knock Code) this would have been straightforward. I ended up getting the flag with some "leaps of logic". Basically, by knowing that the first 4