FEDIDEVS

39c3 2025

39c3 2025

Dive into 16 insightful Mastodon posts from 39c3 2025 by Ryan Castellucci @39C3 featuring key discussions, trending topics, and highlights from the conference.

Add your voice to the conversation by posting with the #39c3 hashtag on Mastodon.

About 39c3 2025

The 39th Chaos Communication Congress (39C3) takes place in Hamburg on 27–30 Dec 2025, and is the 2025 edition of the annual four-day conference on technology, society and utopia organized by the Chaos Computer Club (CCC) and volunteers.

Filter by most active accounts

Filter by conference day

Info

Ryan Castellucci @39C3

nonbinary_flag

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

Today's shirt #39c3

A warm and friendly close-up selfie of a person with long, flowing light brown hair and a gentle, kind smile. They have bright eyes and soft freckles across their cheeks, looking directly into the camera with a welcoming expression.
The subject is wearing a purple t-shirt featuring a vibrant, retro-style graphic.

The design shows a colorful rainbow arching over soft white clouds, topped with a bright yellow star. Across the center of the rainbow, the words "Fuck Bitcoin" are written in a stylized, vintage-inspired blue and white font.

63 14 4

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

Cat ears. Cat ears everywhere. #39c3

44 18 3

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

I have club mate. Soon I will be Awake. #39c3

A close-up selfie of a person with shoulder-length, wavy light brown hair and a warm, confident smile. They look sharp in a crisp, mustard-yellow and black Star Trek-style uniform jacket, complete with a shiny silver Starfleet communicator badge on the chest. The background features rows of reddish-brown auditorium seats, suggesting the subject is happily attending a convention or event.

43 0 3

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

Somewhere down there in the mist, #39c3 day 2 is about to start.

An elevated, wide-angle view of Hamburg at dawn, heavily shrouded in a thick, low-lying mist. The sky transitions from a deep, dusky purple at the top to a vibrant, glowing orange along the horizon where the sun is beginning to rise.

In the center of the frame, the tall, rectangular silhouette of the Radisson Blu Hotel rises above the fog, its upper windows catching the light. To the left, several lower buildings and a construction crane are partially visible through the haze.

Below the hotel, the CCH (Congress Center Hamburg) is obscured by the dense mist, though streetlights along a multi-lane road in the foreground cast a warm, yellow glow through the fog. Several small birds are captured in flight against the clear upper sky, adding a sense of movement to the still, cold morning.

34 13 0

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

My Star Trek uniform was a bit too warm, so today I'll be wearing my purple "Fuck Bitcoin" tshirt. #39c3

16 1 4

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

"8 hours of sleep"

I don't even get that normally. 😭

15 0 4

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

HACK THE PLANET! #39c3

13 0 0

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

The Club Mate is Working. I am Awake. #39c3

10 1 0

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

If nobody asks me about (or complements) my laptop keyboard, I am going to be very disappointed. #39c3

10 0 2

Ryan Castellucci @39C3

nonbinary_flag

@[email protected]

Of course in my stumble out of my hotel I forgot my dect phone. Will have to go back for it at lunchtime. #39c3

8 0 0