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Congrats to the winners who solved all the #CTF challenges - - Veria Labs - tjcsc - TeamH4C* - SquidProxyLovers (* - online) The CTF will be running until 4pm PDT, after which we will release all the challenges on Github and keep the challenges running for another week.

All challenges are now open for BSidesSF #CTF - Good luck and have fun!

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And the curtains are up, we released a wave of new challenges for BSidesSF #CTF. Join us at ctf.bsidessf.net and join the chatter on Discord at discord.gg/dCFQ5XAaQC.

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Are you new to #CTF s and aren't sure where or how to get started? Check out our "Getting started" guide and try your hand at our 101 challenges. ctf.bsidessf.net/getting-star... We are happy to provide walkthroughs of 101 challenges or answer questions in person at the CTF area at BSidesSF.

Thank you for joining us and making the #CTF 's 10 year anniversary very special. We will be back again at 9:00AM PDT tomorrow morning to release another wave of challenges. Join us at ctf.bsidessf.net and on Discord at discord.gg/dCFQ5XAaQC.

Here is our last wave for today, hope you have fun solving the #CTF challenges! We will have 2 more waves tomorrow at 9:00AM and 10:30AM PDT. Join us at ctf.bsidessf.net and join the chatter on Discord at discord.gg/dCFQ5XAaQC.

Another wave of challenges are out for BSidesSF #CTF. We are excited to have 1861 users and 1003 teams registered to for our 10 year anniversary! Hope you are having as much fun as us! Join us at ctf.bsidessf.net and on Discord at discord.gg/dCFQ5XAaQC.

Release Schedule: We will have 2 more waves today, - 03/21/2026 12:00 PM PDT - 03/21/2026 3:30 PM PDT And 2 waves tomorrow, - 03/22/2026 9:00 AM PDT - 03/22/2026 10:00 AM PDT Check out the BSidesSF #CTF at ctf.bsidessf.net and join the chatter on Discord at discord.gg/dCFQ5XAaQC.

BSidesSF 2026 CTF

We have released 6 more #CTF challenges :) Come and get your sweet childhood nostalgia playing Blockman with the all-new blockman-builder which puts you in control of Blockman's next adventure! Join us at ctf.bsidessf.net and join the chatter on Discord at discord.gg/dCFQ5XAaQC.

Come by the BSidesSF #CTF area to try on-site challenges. Pick some locks to earn snacks, stickers and other goodies. We have special stickers to commemorate our 10 year anniversary. Join us at ctf.bsidessf.net and on Discord at discord.gg/dCFQ5XAaQC.

For the 10 year anniversary of our #CTF, we bring back some crowd favorites like our Crossword and Cipher. The latest batch of 5 challenges just dropped, good luck and have fun! Join us at ctf.bsidessf.net and on Discord at discord.gg/dCFQ5XAaQC.

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“Don’t sleep through this year’s CTF, we have some amazing challenges in store for you!” - BSidesSF #CTF Join us at ctf.bsidessf.net and on Discord at discord.gg/dCFQ5XAaQC.

We've dropped the last batch of #CTF challenges for today. Looking forward to seeing folks in person at @bsidessf.org tomorrow morning! Join us at ctf.bsidessf.net and on Discord at discord.gg/dCFQ5XAaQC.

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5 more challenges out. This year’s #CTF challenge is a love song… written in loops, increments, and questionable life choices.

The needle dropped are you ready to groove? We have 12 #CTF challenges open for you, check it out at ctf.bsidessf.net. Hakuna matata what a wonderful phrase. Hakuna matata, ain't no passin' craze.

It’s the 10-year anniversary of the BSidesSF #CTF! We’re dropping the needle tomorrow! Get ready to solve challenges, pick locks and groove to the beat! Register at ctf.bsidessf.net and join us on Discord at discord.gg/dCFQ5XAaQC.

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Ron Bowes @iagox86.bsky.social · 19/03/2026

Reposted by BSidesSF CTF

I'm so proud of the @bsidessfctf.bsky.social team - 10 years (11 challenges) later and they're all still killing it with a huge variety of cool challenges of all difficulty levels! #ctf #bsidessf

BSidesSF CTF @bsidessfctf.bsky.social · 18/03/2026

Step right up to the BSidesSF #CTF Pick a lock and collect some awesome stickers this Saturday!

BSidesSF CTF @bsidessfctf.bsky.social · 17/03/2026

Last year’s cipher struck a chord… now it’s back for an encore! Can you stay in tune and hit the right notes? #CTF #BSidesSF

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BSidesSF CTF @bsidessfctf.bsky.social · 17/03/2026

281 users and 166 teams have already registered to play this year's BSidesSF #CTF. We have almost 50 challenges in Web, Crypto, Pwn, RE and Mobile ready to go. Register at ctf.bsidessf.net and join us on Discord at discord.gg/dCFQ5XAaQC.

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BSidesSF CTF @bsidessfctf.bsky.social · 15/03/2026

A big thanks to the BSidesSF #CTF sponsors Upwind. They have generously sponsored the prizes for this year. Join us at ctf.bsidessf.net Note: Only on-site teams are eligible for prizes.

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BSidesSF CTF @bsidessfctf.bsky.social · 14/03/2026

Getting ready to launch the BSidesSF #CTF on Friday at 4PM PDT. Register at ctf.bsidessf.net and on Discord at discord.gg/dCFQ5XAaQC.

BSidesSF CTF @bsidessfctf.bsky.social · 28/02/2026

BSidesSF 2026 CTF

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Hey folks - the #CTF is back this year and will be running from March 20th, Friday 4pm PDT to March 22nd, Sunday 4pm PDT. Head over to ctf.bsidessf.net/register to register and join us for the 10 year anniversary. We are continuing our Discord from last year, so join us at discord.gg/dCFQ5XAaQC

Ron Bowes @iagox86.bsky.social · 12/02/2026

BSidesSF 2026 CTF

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Reposted by BSidesSF CTF

Half way through my "work on @bsidessfctf.bsky.social week"! I've written a compiler, designed a stupid cryptosystem based on a Seth MacFarlane show I fell asleep watching, and wrote challenges to teach write-,memory vulnerabilities Two more days, what other crazy ideas will fall out of my brain?

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BSidesSF CTF @bsidessfctf.bsky.social · 20/12/2025

We are preparing riffs, rhythms, and riddles for you for BSidesSF #CTF. Hope you can hit the right key in March :)

BSidesSF CTF @bsidessfctf.bsky.social · 02/05/2025

Voting is enabled for #BSidesSF #CTF on CTFtime! Please do vote at ctftime.org/event/2721, by Sunday. Thanks again to all the players and friends who helped connect us with the CTFTime admins and to the CTFTime admins for helping resolve this issue!

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BSidesSF CTF @bsidessfctf.bsky.social · 30/04/2025

Thank you folks for playing this year's #BSidesSF #CTF. We'll be back again next year with more challenges! All challenges will stay up until Sunday evening at ctf.bsidessf.net. Source code at github.com/BSidesSF/ctf.... Write-ups at - www.skullsecurity.org, itsc0rg1.medium.com/bsidessf-202....

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BSidesSF CTF @bsidessfctf.bsky.social · 28/04/2025

Congrats to the top 3 teams - HammondFanClubTime, meow and Stanford Applied Cyber! Good game!! #BSidesSF #CTF

Less than 50 minutes to go, the top 3 teams are close, who will cinch first place? #BSidesSF #CTF Check out the CTF at ctf.bsidessf.net

Hint Alert! For digital-citizen-2, coppersmith is a must. Collect everything you learned from solving 1, identify all the possible "patterns" and then coppersmith to victory. #BSidesSF #CTF Join us at ctf.bsidessf.net

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Hint Alert!! For slackblock-steg pay very close attention to what images the tool will accept to add a message to. Once you figure out what property images need to have, you should have a much better idea of how/where data is being hidden. #BSidesSF #CTF Join us at ctf.bsidessf.net

Hint Alert!! The acaan challenge is supposed to help prepare you for drago-daction. drago-daction has a vulnerability that gives you a "write any data to any file at any offset" primitive, and once you're there they're the same solution. #BSidesSF #CTF Check it out at ctf.bsidessf.net

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1337 teams registered to play :D #BSidesSF #CTF Join them at ctf.bsidessf.net

We've crossed 1300 registered users and 800 registered teams! Join them at #BSidesSF #CTF - ctf.bsidessf.net/register.

New to CTFs and not sure how to get started? Check out #BSidesSF #CTF at ctf.bsidessf.net/getting-star.... We have several beginner friendly challenges and have walkthroughs for some of our 101 challenges. Good luck and have fun!

Brave adventurers! The Dragon's CTF Keep unlocks its final secrets! Prepare for the last wave of challenges #BSidesSF #CTF ctf.bsidessf.net * magic * pathing * hoard * extinction * cipher-block-corruption * tarnation * extra-effed-system * nearest-neighbor * cert-tool

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Over 1000 players and 600 teams registered and 48 challenges up at #BsidesSF #CTF Join them at ctf.bsidessf.net

Last wave for the day for #BSidesSF #CTF * pascals-homomorphism-1 * pascals-homomorphism-2 * slackblock-steg * amd * dating * goto-zero Check out: ctf.bsidessf.net

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New batch of challenges incoming!! * taxonomy * detector-2 * go-back #BsidesSF #CTF Check them out at - ctf.bsidessf.net

BSidesSF 2025 CTF

Just in time for lunch, 4 challenges hot off the grill - web-tutorial-2 sighting nextPM oh-say-can-you-see #BSidesSF #CTF Check them out at - ctf.bsidessf.net

BSidesSF 2025 CTF

We have over 1000 players playing #BSidesSF #CTF. Join them and try your hand at solving our Crypto, Forensics, Pwnables, Web, Mobile and Misc challenges at ctf.bsidessf.net. A big shout out to our sponsors Adobe!

Our lockpicking challenges are back! Check them out onsite at the #CTF area onsite at #BSidesSFCTF. We have some cool stickers for people that solve them! Scoreboard at ctf.bsidessf.net

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A new wave of challenges for #BSidesSF #CTF Check them out ctf.bsidessf.net crossworthy bug-me obscuratron hidden-reports hangman-two evidence subprime dragon-spell web-tutorial-1 dragon-name ruthless-dot-flag-1 ruthless-dot-flag-2 qr-decomp (onsite only!) locky (onsite only!) boxy (onsite only!)

ctf.bsidessf

We just dropped 3 more challenges for today, we don't plan to release more for today. More to come tomorrow at 9am! #BSidesSF #CTF Check out our Chrome Extension challenge, "moa-station", at ctf.bsidessf.net.

Oh the place you'll go, the scenes you will see. Oh what is under the hidden box? Whatever could it be? #BSidesSF #CTF Join us at ctf.bsidessf.net

3 more challenges out now at ctf.bsidessf.net! #BSidesSF #CTF * flag-search * soothsayer * arrow-of-time

And, we are off! Over 360 teams are playing with 13 teams on the scoreboard. #BSidesSF #CTF Join us at, ctf.bsidessf.net