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

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!

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!

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

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!

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.

Solution

Flag:

PreviousKaspersky 2017 NextHackCon 2017

Last updated 3 years ago

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!

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!

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.

Solution

Flag: