# Hack.lu 2017

Starting Here

## b64 - Crypto \[100 pts] \[Not Solved]

> Taking part in elite, exclusive groups entails being able to hide secrets from the lesser folk and only provide it to the gifted. Our intern recently proposed a solution to do just that.\
> \
> nc flatearth.fluxfingers.net 1718

{% file src="/files/-Mdr7hcU6oznRuGe6p10" %}
b64
{% endfile %}

Solution

Flag:

## McEliece - ?? \[Points Value] \[Not Solved]

> Na, heard you talkin' bout this super secure crypto system. That one that uses some fancy codes for encoding, eh encryption! They say, its only secure with this Goppa stuff. That's bullshit, I say! It's only really secure when you choose the right codes. And Goppa ain't no right code. Believe me! You gotte believe what our great leader teaches us: Only the madman is ever secure! And never whistle while you're pissing!. From him we can also learn, the only right codes are Reed Solomon ones! And to prove this, I'll show you something you can never decode, eh decrypt!

{% file src="/files/-Mdr7su9EPwMy-uAw4Ec" %}
McEliece
{% endfile %}

Solution

Flag:

## prime enigma - Crypto \[50 pts] \[Not Solved]

> Hey there fellow lizard how nice of you to drop by! Did you know those filthy humans really think that some numbers have special meanings? Seven, 13 and for some strange reason even 9000. Go and show them that a good prime does not make a secure cryptosystem!

{% file src="/files/-Mdr82gtFKkJPfXlMKah" %}
prime enigma
{% endfile %}

Solution

Flag:

## salsa - Category \[200 pts] \[Not Solved]

> The Flat Earth Society has a secret information storage. There is enough evidence in it, to convince every member of them, that the earth is round. Unfortunately, we don’t have the key ...\
> nc flatearth.fluxfingers.net 1721

{% file src="/files/-Mdr8EROgycFMcX0biAW" %}
salsa
{% endfile %}

Solution

Flag:

## DnSoSecure - Web \[200 pts] \[Not Solved]

> We found this Flag-Submission-Service that is used by the OTHER-SIDE. Try to get it to submit the flag to you!

{% file src="/files/-Mdr8NJe1Hd32-qVRPw7" %}
dnsosecure
{% endfile %}

Solution

Flag:

## The Maya Society - Rev \[50 pts] \[Not Solved]

> Maya society was broken into a class structure with four main levels: the nobility (Maya almehenob), the priesthood (Maya ahkinob), the common people (Maya ah chembal uinieol), and the slaves (Maya ppencatob). The most powerful of the ruling elite was known as the halach uinic. The halach uinic are alive and still secretly hold meetings today. You have to reverse engineer their communication and infiltrate the ruling elite.

{% file src="/files/-Mdr8ViZsZz\_0dNu8L1H" %}
maya
{% endfile %}

Solution

Flag:


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://codingmace.gitbook.io/masterward/ctf/2017/hack.lu-2017.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.