Official discussion thread for Quantum-Safe. Please do not post any spoilers or big hints.

Nice custom made challenge. You need to know some basic maths to solve this oneâ€¦ I donâ€™t know if i did it the smartest way but it was fun

Thx to Ir0nstone for creating this one

Nice challenge ! Thanks Ir0nStone.

However, something seems weird â€¦ When I run my script, I find the correct flag, but with a character missing !

Am I the only one ? I think the `(5694, -8016, 6237)`

(9th one) is the problem

You can PM me if needed

At first I had the same problem: One character of the flag was missing. In my case it was the 36th character, and not no. 9

I figured it out after a while. Without that character the flag didnâ€™t make sense grammaticallyâ€¦

Really nice challenge, my solution was not probably the intended one, but I got there in the end. Mine flag was not missing any characters so probably it was fixed already.

If anyone need a help feel free to PM me.

Nice challenge! solved it after a week without doing the intended method. Did anyone solve it using the intended method? Please DM me!

Well I finally maneged to get it (after a lot of waitingâ€¦) probably not using the intended way like everyoneâ€¦

So a tip: be patient

I solved the challenge but I had to bruteforce r. Is there a clean way to calculate r, maybe someone can write me a PM about this:+1:

Would also be interested in learning a more mathematical solutionâ€¦ messaged a math phd friend of mine after getting the flagâ€¦ so maybe theyâ€™ll be able to tell me. Feel like I did a â€śsmart brute forceâ€ť of r â€¦ took only about 30 seconds to run and gave me actually 324 different r vectors that all workâ€¦

Guys Iâ€™ve got this error while running `source.sage`

, why:

```
$ sage source.sage
Traceback (most recent call last):
File "/home/bambam/crypto/quantumsafe/crypto_quantum_safe/source.sage.py", line 16, in <module>
for c in flag:
NameError: name 'flag' is not defined. Did you mean: 'float'?
```

Nice challenge

If you have found the flag but are missing some letters, what is missing is the use of Rond

If you are stuck or need help, do not hesitate to DM