## CTF crypto 2021-10-4 record

Basic knowledge
CBC flip attack
Introduction:
When one of our values C is obtained by the exclusive or of A and B C = A XOR B that A XOR B XOR C is obviously = 0 When we know B and C, it's easy to get the value of A A = B XOR C Therefore, A XOR B XOR C is equal to 0. With this formula, we can set our own value at the end of XOR operat ...

Posted on *Mon, 04 Oct 2021 16:36:34 -0400* by **gitosh**

## Punch in 21/9/3 [De1CTF2019]babyrsa

[De1CTF2019]babyrsa
The code given is divided into four parts:
1. Part I (p):
n = [2012961535249176549934011294318831718054876159786130084730582714151046561967053684463455824643923037165883692810306343287024570718035590719428486151090607126535240957944104810108499592396214852709737070545207057709878024628282006557371101566429199137208515701 ...

Posted on *Fri, 03 Sep 2021 16:15:14 -0400* by **nielsene**

## crypto experiment report

Cryptography experiment report
The author participated in an experimental report assignment of network attack and defense innovation practice course in freshman and primary school, which is a pure entry level
Experimental objectives
Part I
The following ciphertext is encrypted with classical password. Please identify and write the ...

Posted on *Thu, 02 Sep 2021 17:25:55 -0400* by **Shawazi**