The Most Secured Crypto-Channel
160 points Hard

Scientists have launched the satellite with the most secured crypto-channel in the world! It is quantum channel (BB84). But hackers had managed to sniff it. You should help those hackers to find out what was in the satellite’€™s transmission. File: https://mega.nz/#!jfpChKTT!TTDfy2l1hGrNwDrM3DQEjX6kmUVDy5DmMatnka5NvXc

Flag
Rating 4.71
5
4
3
2
1

Discussion

I dont understand why / is 0 not 1.

0

Owww, I already know that any variation of photon polarization

0

Keep a cool head. Read a bit, and this will not be hard to solve.

1

Don't give up on this one. It's very doable and worth the effort. I wasted a lot of time because I was trying to decode 0,45,90,135 as 1,0,0,1 (per an online chart) when I should have been using 0,0,1,1. You'll see what I mean...

9

any hint ? what is the flag format?

0

Correct me if i'm wrong, but according to the bb84 protocol, transmission2 and transmission3 should be the exchange of bases, so the last transmission file was misleading (otherwise, good challenge)

1

Correct me if i'm wrong, but according to the bb84 protocol, transmission2 and transmission3 should be the exchange of bases, so the last transmission file was misleading (otherwise, good challenge)

1

Thank for this challenge, I've learnt sth.

0

Good one. I have achieved quantum supremacy ?.

0
Protected
0