Julekalender 2021 - Luke 3

Trenger du et avbrekk fra eksamenslesing? Helt Sikker vil de fire søndagene før jul publisere en liten CTF-oppgave. Alle som løser oppgaven er hver uke med i trekningen av et foodora-gavekort! Det blir en ekstra trekning på slutten blant de som løser alle fire :)

Her er tredje luke:

Agent Chirping

Our counter-intelligence department has once again detected signs of an adversary, this time it looks like an agent is trying to signal home. The agent seems to be lurking among other birds, tweeting and chirping. We have picked up signs that the agent is well versed in old-school cryptography and communication methods.

We believe he is working under the name jamanik_bananik.

Good luck!

Please submit your answer here.