I like the idea od Cuckoo's Egg, as a visualisation of something you cannot trust, so I think you have the "security" bit covered, but I am missing the "cyber" bit. Maybe the animal could be some IT brand, maybe these could be Android's eggs? Or something like that? Or maybe the granade could have something more cyber about it?
Very jealous of your drawing skills Tristan Spill ! I see you were inspired by the Trojan Horse, I tried not to look at any other contributions, before completing mine for better or worse xd The Trojan Horse is one of my favourites here, but it does look like a complete work already. It could easily be published, I like that in your drawing you went with the contest premise of doing a quick sketch. The goofy hacker is my favourite, and the cat is on the second place. Very good idea and well-executed. What I really like about it is that whoever will be looking at this image will understand what this is about in an instant, no additional explanation necessary. On top of that, it's cute. The brief was asking for something that isn't fear-inducing, so this is on-brief.