Computer Security

Do we really choose our actions, or are we shaped by forces far beyond our control? We often think of free will as the power to make our own decisions and direct our lives. But if we are physical beings in a world governed by cause and effect, what kind of freedom is actually possible? At our next Curiosity Café, we’ll explore one of philosophy’s most fascinating and consequential questions: what is free will? Together, we’ll examine some of the major ways philosophers have tried to answer it. Is freedom compatible with determinism? Are we only free when no one is coercing us? Or does genuine freedom require that we somehow break free from the chain of prior causes altogether? From there, we’ll dive into one of the most famous thought experiments in philosophy — Frankfurt’s case of Jones and Black — which challenges the idea that freedom always requires the ability to do otherwise. What does it really mean to choose freely? And what kind of control do we need in order to be morally responsible? In our second hour, we’ll turn to the ethical and political stakes of the debate. How should we think about responsibility in cases involving brain injury or mental illness? When someone’s capacity for control is impaired, does that reduce their blameworthiness? And if free will is more limited than we tend to assume, what does that mean for punishment, justice, and moral responsibility? Finally, we’ll ask what is really at stake in holding on to the idea of free will. Is it essential to moral responsibility? Can we preserve accountability without it? And how might our legal, political, and social institutions look different depending on how we answer these questions? Join co-moderators Ken Boyd and Marybel Menzies to reflect, question, and engage with others as we explore one of the deepest questions about what it means to be human — whether or not we are free. **Space is limited!** **Please obtain a “Pay-What-You-Can” ticket from Curiosity Café at [this link (click here)](https://www.eventbrite.ca/e/curiosity-cafe-free-will-tickets-1986181200437) to attend this event. You need a ticket to be admitted.** See the above link for more info about tickets and other options including a limited number of free tickets. Come and hang out with us, grab food, and read through our handout from 6-6:30pm. Our structured discussion will run from 6:30-8:30pm with a 10 minute break in the middle. Hope to see you there! ***__________________________________________________________________*** This event is brought to you by [Being and Becoming](https://beingnbecoming.org/), a Toronto based non-profit. We aim to create community around exploring everyday concepts and experiences so that we may live more intentional, thoughtful, and meaningful lives. We use philosophy as a tool with which we can come to a richer understanding of the world around us. By offering activities, spaces, and other opportunities for conversation and co-exploration, we hope to enable the meeting and fusion of individuals and their ideas. Everyone is welcome, regardless of background: indeed, we believe the journey is best undertaken alongside explorers from a variety of disciplines, cultures, backgrounds, and experiences. Find out more about Being and Becoming [here](https://beingnbecoming.org/). About the Curiosity Café Series: For those of you who haven’t had the opportunity to join us at our Curiosity Cafés and are wondering what they’re all about: every two weeks, we invite members of our community to come out to the Madison Avenue Pub to engage in a collaborative exploration of our chosen topic. Through these events, we aim to build our community of people who like to think deeply about life’s big questions, and provide each other with some philosophical tools to dig deeper into whatever it is we are most curious about.

**Drop-In Pickleball at the Miles Nadal JCC** Come play one of the fastest-growing sports in North America — right in the heart of the Annex! Join us for friendly, active Pickleball at the Miles Nadal JCC, just steps from Spadina Station. It’s a great way to stay active, meet new people, and have some fun! *** **🏓 Event Details:** **Location:** 750 Spadina Ave. (enter through the Spadina doors) **Check-In:** Stop by security and check in at the front desk when you arrive. *** **🏓 Registration & Payment (Required in Advance):** **RSVP on Meetup does *not* reserve your spot.** To participate in Drop-In Play, you must register and pay in advance via our registration system. 👉 [Register online](https://app.amilia.com/store/en/miles-nadal-jcc/api/Activity/Detail?activityId=bN72APE) 📞 Or register by phone: 416-924-6211 Space is limited to **18 players** on a first-come, first-served basis. Once full, no additional participants can be accommodated. *** **🏓 Other Info:** * Paddles and balls are available for loan at the front desk with a **$20 cash deposit and valid ID** * This session is intended for **novice players and above** — participants should know basic rules and scoring * Courts are rotated regularly so everyone gets a chance to play * Welcoming, inclusive environment *** Come ready to rally, socialize, and have a great time on the court. We can’t wait to see you there!

⚠️ **Important:** RSVPs on Meetup **do not guarantee a spot.** To secure your complimentary experience, you **must call or text us at 416-900-9679** to confirm your qualification and booking. Please don’t attend without confirmation – space is limited and unconfirmed arrivals cannot be accommodated. Experience what it feels like to train at Toronto’s most advanced **fitness and longevity studio** — where science meets community. In this small group session, you’ll build functional strength, endurance, and mobility while learning how to move and recover like an athlete. Each class blends: * **Short bursts of cardio** (yes, even if you hate it) * **Targeted functional strength training** to build lean muscle * **Mobility, mindfulness, and breathwork** to finish strong and centered All levels are welcome — from beginners to seasoned gym-goers. Our coaches lead every step and correct your form in real time to ensure maximum results and safety. 📍 **Location:** Telomere Fitness, 518 Yonge Street (Yonge & College) 🚇 Easy access by subway – minutes from College Station ### 💥 **Special Complimentary Offer (Limited Spots)** We’re currently offering for **qualified downtown Toronto residents** a *free* full fitness experience, including: ✅ **InBody Scan** (body composition & fat/muscle analysis) ✅ **Personal Fitness Assessment** ✅ **Small Group Training Session** ✅ **Nutrition Consult** *(Total value: $200 – complimentary for qualified individuals)* ### 🔹 **How to Qualify** To reserve your complimentary session, you must **live or work in downtown Toronto** and **call or text us first** at **416-900-9679** to confirm eligibility. Spots are limited to maintain our small-group focus. ### 🏋️‍♂️ **How to Prepare** * Wear athletic clothing and indoor footwear. * Bring a water bottle – we have a no-touch filling station. ### 🕓 **Event Schedule** * We offer 5 sessions per day - Morning, After you and then this is where I had an issue I couldn't just make it. It's weird.noon and Evening * Spots fill up fast so call us to see if we have a spot available at your preferred day/time! * RSVP + confirmation required before attending 📍 Google Maps: [https://maps.app.goo.gl/6jMKrTvr4Lk5aUna7](https://maps.app.goo.gl/6jMKrTvr4Lk5aUna7) 📞 Questions? Call or text us anytime: **416-900-9679** ### ⚠️ **Final Reminder** Meetup RSVPs **alone do not** secure a space. Please **call or text 416-900-9679** after RSVPing to confirm your booking. Unconfirmed arrivals **cannot be admitted** due to limited capacity.

We are following our favourite trivia host, Simon from Are You Smarter than a Scottish Guy, to one of his other weekly locations: One-Eyed Jack's at 287 Richmond Road (between John and Peter Streets). The beer selection at this location is quite minimal but their food menu is good - https://www.oneeyedjackpub.com/torontomenu. They have a $0.95 wing special with lots of flavours. The trivia starts at 7:00pm with first question at 7:15 pm. We have a pair of tables (12 people) reserved under Steve so far. Serious RSVPs only as no-shows prevent us from fielding a complete team. Top prizes is a gift certificate for the next visit. Other prizes are a free round for the table and nachos. There is also a small prize for best team name, so put on your creative hat; the host seems to like puns and prefers short team names. Let's have some fun, eat some wings, and hopefully win!

Practice and improve your English through conversation at St. Andrew Centre (73 Simcoe St, downtown Toronto), while making new friends! \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- How to Get to the Event: By TTC, exit at St. Andrew Station. Walk west on King St. West to Simcoe St. Do not enter through the church building; the large church front doors will be closed. At the corner of Simcoe St. and King St. West, turn south and walk on Simcoe St. Enter through St. Andrew Centre, which will be behind the church building.

**This is a ticketed event. Please register at [this link](https://luma.com/wbpv7ouu).** In this talk, Talha Paracha will present insights from his latest research on using language models for improving software security ("Hallucinating Certificates", to appear at ICSE 2026). Certificate validation is a crucial step in Transport Layer Security (TLS), the de facto standard network security protocol. Prior research has shown that differentially testing TLS implementations with synthetic certificates can reveal critical security issues, such as accidentally accepting untrusted certificates. Paracha et al. introduce a new approach, MLCerts, to generate synthetic certificates that leverages generative language models to more extensively test software implementations. Recently, these models have become (in)famous for their applications in generating content, writing code, and conversing with users, as well as for "hallucinating" syntactically correct yet semantically nonsensical output. The authors leverage two novel insights in their work: (a) TLS certificates can be expressed in natural-like language, namely in the X.509 standard that aids human readability, and (b) differential testing can benefit from hallucinated malformed test cases. MLCerts finds significantly more distinct discrepancies between the five TLS implementations OpenSSL, LibreSSL, GnuTLS, MbedTLS, and MatrixSSL than the state-of-the-art benchmark Transcert. ​​​**Event Schedule** 6:00 to 6:30 - Food and introductions 6:30 to 7:30 - Presentation and Q&A 7:30 to 9:00 - Open Discussions ​​​​​​If you can't make it in person, feel free to join the live stream starting at 6:30 pm, via [this link](https://www.youtube.com/@Trajectory-Labs/live).

\*\*Please note that this event requires your name and email address for QR code to get access to the building on the event day, you must register or else you will not receive a QR code for access\*\* [Link ](https://forms.office.com/r/7ZB00rZmBh?origin=lprLink)to Registration: https://forms.office.com/r/7ZB00rZmBh?origin=lprLink Agenda: Join us for the **GitHub Copilot Dev Days** event in Toronto! ​Whether you use VS Code, or any other tool in your stack, this session is GitHub‑centric but fully tool‑agnostic — come as you are, code how you like. ​**What to Expect** * ​Practical insights into real GitHub workflows and modern AI‑assisted development * ​Live demos from local engineers and community builders * ​A friendly, social environment to connect, share ideas, and learn from one another **Speakers:** -Bruno Capuano \- Cihan Cinar \- Kaan Turgut -Ehsan Eskandari

Let’s do some coding together at a cafe! No more working alone in the weekend. Here, we write code together. And I mean together together. Not occupying-the-same-space-but-separate together. Here’s how it works: Jennifer brings her mobile app project, tells everyone that it is like Pinterest for recipes and she’d like to work on the nav bar. Paul and Chloe think Jennifer's project is fascinating, and they join the group. They gather around Jennifer’s laptop and work on the nav bar for 2 hours. Jennifer is the one typing out the code while Paul and Chloe research, brainstorm, and offer suggestions. If you’re feeling stuck on your own project or need a motivation boost, bring it to mob programming! Want to learn by watching how others code and solve problems? Join someone else’s project at this event! Oh and we love your half-done projects that you are a bit embarrassed to share. Absolutely bring those to the event! **Discord**: We use Discord to share screen & code snippets during the event. Also feel free to share your projects here before the event! https://discord.gg/yvAGbh4PpD **Event policy**: * We have 0 tolerance for harassment. * We don’t allow the projects that are not meant to be shared in public such as school assignments, interview tasks, or trade secrets. * The goal is to write code. We discourage you from pitching business ideas here, doing code reviews, or spending the whole event on planning what to do. * Please buy a drink, and tip the barista well.

A diffuse harm hurts many people a little; a concentrated harm hurts one person a lot. Other things equal, diffuse harm seems less bad than its concentrated counterpart. For example, shortening a billion happy lives by a second each seems less bad than shortening one happy life by a billion seconds (\~30 years). But this attractive thought is surprisingly difficult to maintain. Although many problems for such a view are known, a particularly vivid difficulty arises in cases that involve a sequence of social positions, each very similar to the last, such as the Fortuna’s Wheel scenario. In such cases, it follows, from rather minimal assumptions, that diffuse harm is just as bad as its relevantly similar concentrated counterpart. In response, some may wonder whether the parity of diffuse and concentrated harms holds only in these special sequential cases. But it can be argued that the approximate parity of diffuse and concentrated harms extends well beyond such cases. Specifically, it can be argued that in many realistic cases, a diffuse harm will bring about an outcome approximately as bad as a relevantly similar concentrated harm. Diffuse harm is easily underestimated. Zach Barnett https://philosophy.nd.edu/people/faculty/zach-barnett/ Assistant Professor Department of Philosophy University of Notre Dame **About the Speaker:** Zach received his PhD from Brown University in 2018. He joined Notre Dame in 2023, moving from the National University of Singapore, where he taught for five years. Zach mainly studies ethics, practical rationality, and epistemology, and he hopes that his work is convincing, surprising, and easy to understand. Current research interests include collective action problems, aggregation and risk, and followability of norms. His representative publications include "Rational Moral Ignorance" (2021) in *Philosophy and Phenomenological Research*, "Why You Should Vote to Change the Outcome" (2020) in *Philosophy & Public Affairs,* "Philosophy Without Belief" (2019) in *Mind*, and "No Free Lunch: The Significance of Tiny Contributions" (2018) in *Analysis*. **\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*** This is a talk with audience Q&A presented by the University of Toronto's Centre for Ethics that is free to attend and open to the public. The talk will also be streamed online with live chat here [to be posted]. About the Centre for Ethics (http://ethics.utoronto.ca): The Centre for Ethics is an interdisciplinary centre aimed at advancing research and teaching in the field of ethics, broadly defined. The Centre seeks to bring together the theoretical and practical knowledge of diverse scholars, students, public servants and social leaders in order to increase understanding of the ethical dimensions of individual, social, and political life. In pursuit of its interdisciplinary mission, the Centre fosters lines of inquiry such as (1) foundations of ethics, which encompasses the history of ethics and core concepts in the philosophical study of ethics; (2) ethics in action, which relates theory to practice in key domains of social life, including bioethics, business ethics, and ethics in the public sphere; and (3) ethics in translation, which draws upon the rich multiculturalism of the City of Toronto and addresses the ethics of multicultural societies, ethical discourse across religious and cultural boundaries, and the ethics of international society. The Ethics of A.I. Lab at the Centre For Ethics recently appeared on a list of 10 organizations leading the way in ethical A.I.: https://ocean.sagepub.com/blog/10-organizations-leading-the-way-in-ethical-ai

Eventbrite Link: **[https://www.eventbrite.ca/e/694505453507?aff=oddtdtcreator](https://www.eventbrite.ca/e/694505453507?aff=oddtdtcreator)** **Get groovy with Funky Fridays! Toronto's comedy party starts at 8 PM. Unwind, laugh, and kick off your weekend in style!** Dive into the comedic groove every Friday at 8 PM! Experience the funky vibes of Toronto's top comedians at Backroom Comedy Club. Join us for a night of uproarious laughter, good times, and the perfect start to your weekend. Secure your spot for an unforgettable evening filled with funky fun and stand-up brilliance!

🚨👉 To RSVP for this event, head to our [Luma event page](https://luma.com/cye39lls). RSVPs are intentionally closed on Meetup.👈🚨 https://luma.com/cye39lls Join us for a welcoming and inclusive coffee meetup where women and non-binary folks in tech can connect, share experiences, and build community in a relaxed setting. **April Topic:** When the Ground Shifts - Navigating Change in Work and Life Whether you're an industry veteran or just getting started, everyone is welcome! **FREE ENTRY** – However, please support the café by purchasing a drink or snack while attending. **Location:** Prema Coffee and Bar, 35 McCaul St #110, Toronto, ON M5T 1V7 **Time:** 11:00 AM – 1:00 PM **Schedule:** 11:00 AM – 11:30 AM → Arrive, grab a drink/snack, socialize 11:30 AM – 1:00 PM → Group discussion, paired chats & activities **Important Notes for RSVPs** We’re introducing a few questions when you RSVP to help us manage space and ensure an inclusive environment: **This is a space created to support people who are underrepresented in tech.** We ask **cisgender men** (men who were assigned male at birth and identify as male) to respect this and not attend. **To manage limited space, we track no-shows for all Code Diversity events.** If you RSVP and miss two events, you’ll be waitlisted for future events. Please update your RSVP at least 24 hours in advance if you can’t attend. **Photography & Video Disclaimer:** By attending this event, you acknowledge and agree that photographs and/or video recordings may be taken. These may be used for promotional purposes, including social media, websites, and other marketing materials. If you do not wish to be photographed or recorded, please inform the event organizer upon arrival. **Organized by TechTank** Let’s continue fostering diversity, inclusion, and innovation in tech—this month and beyond! **Join our vibrant community for the latest updates and continued discussions:** [https://linktr.ee/techtankto](https://linktr.ee/techtankto)

**Note the location Thai Express Union Station food court.** **Google pin.** [https://share.google/grUYGncv3G3exetw7](https://share.google/grUYGncv3G3exetw7) **We will discuss day trading, swing trading strategies and tools.** This will not be a presentation format. **Telegram group for quicker communication:** [https://t.me/+m8BMRABGX74xNmZh](https://t.me/+m8BMRABGX74xNmZh) **Discord Group for exchanging ideas, charts and strategies** [https://discord.gg/SVYTSPh7](https://discord.gg/SVYTSPh7) We will discuss options trading and investing strategies, as well as the skills needed to start. It is a **casual meetup to meet people who are interested in trading or building a career around it, especially algorithmically. No "financial gurus" are welcome.** Join us for a meetup where we share trading ideas, and connect with others who share a common interest in investing. Algorithmic trading is commonly used by large institutional investors and market makers, but it is also accessible to retail traders. It offers several advantages over manual or discretionary approaches—particularly in minimizing psychological errors that often impact human traders. Some of the topics we usually discuss: \- Reasons for investing \- Limitations of being a retail trader \- Practical tools: brokers\, APIs\, data sources\, real\-time implementation \- Brainstorming ideas: strategies that may be working today **Note this even is not sponsored or endorsed by any business where we are meeting. We are just using their space for casual meetup event.** **Please no promotion of MLM, pyramid schemes, self promotion to paid services, affiliate promotion, paid subscriptions or similar stuff.** **Useful Links** * Notion page of [Algo Trading Resources](https://systemetic.notion.site/Algorithmic-Trading-Resources-fe400c5258e440fd8a4d63770d08bc13) **Disclaimer:** This meetup is for educational and informational purposes only and should not be construed as professional financial advice. The discussions and materials presented at this meetup are provided as general information and are not intended to be a substitute for professional financial, legal, or tax advice. All participants are encouraged to consult their financial advisor or qualified professionals regarding specific financial issues. None of the organizers, speakers, or participants at this meetup are liable for any financial loss or damage incurred as a result of trading activities or decisions based on the information shared during this event. Trading stocks and other financial instruments involves risk and may not be suitable for all individuals. **CFTC Rule 4.41:** Futures, foreign currency and options trading contains substantial risk and is not for every investor. An investor could potentially lose all or more than the initial investment. Risk capital is money that can be lost without jeopardizing one’s financial security or lifestyle. Only risk capital should be used for trading and only those with sufficient risk capital should consider trading. Past performance is not necessarily indicative of future results. **Non-Endorsement**: References to specific securities, investment strategies, or any financial instruments during the meetup are for illustrative purposes only and do not constitute a recommendation, endorsement, or investment advice by the organizers or speakers. **No Guarantees**: There is no guarantee that the investment strategies discussed will be profitable or protect against loss. All investments involve the risk of loss. **Conflict of Interest**: Presenters or organizers may hold or intend to acquire positions in securities discussed during the meetup, which may create a conflict of interest.

The global Azure community is coming together again, and Columbus is officially on the map. View the session lineup and speakers at [Global Azure Columbus 2026](https://coazure.github.io/cbus-global-azure-2026/) On **Saturday, April 18, 2026**, the Azure Columbus Meetup, DevOps Meetup, and Code and Coffee Meetup are hosting our local edition of Global Azure 2026. This is a free, community-driven event packed with learning, networking, and all things Microsoft Azure. Whether you’re building modern cloud-native apps, experimenting with AI agents, deploying containers, automating infrastructure, or just beginning your Azure journey, this event is for you! **What to Expect** * Engaging technical sessions * Real-world Azure architecture & cloud-native patterns * AI, agents, automation, and modern DevOps * Food and drinks (because learning burns calories) * Time to connect with fellow engineers, architects, and cloud enthusiasts **Who Should Attend?** * Software engineers (any language, any stack) * Cloud architects * DevOps engineers * Data professionals * AI explorers * Platform builders * Anyone who loves solving hard problems with great tools If you build, deploy, automate, scale, monitor, or optimize in Azure, you’ll feel right at home. **Why Global Azure?** Global Azure is a worldwide community event where Azure user groups host learning sessions on the same day across the globe. It’s grassroots. It’s technical. It’s practical. And it’s powered by people who genuinely love sharing what they’ve learned. And yes, it’s free to attend!

AI is changing how art is made. But when does it stop being your work and start being the machine’s? This month we're going to be doing a panel with with digital image, music, and written word artists, talking about at what point, while using AI in the creation process, does the work become not the artist creation? We encourage audience participation during this event that will be moderated by Chris Slee. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.transformlabs.com/services)

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

The Fellowship of the Star Schema: Transforming OLTP Data for Power BI One does not simply build reports on OLTP data. Join us on an epic journey from the depths of raw, normalized tables to the shining halls of a well-modeled star schema fit for Power BI greatness. We will demystify the differences between OLTP and OLAP, walk through star schema vs snowflake (and why Power BI has a clear favorite), and show you the compression differences between normalized and columnar storage that will make you never look at an OLTP model the same way again. We will cover the different types of dimensions, when to use them, and how to handle Slowly Changing Dimensions without losing your mind. You will leave knowing exactly how to identify a bad model, how to convert OLTP data into a clean star schema, and how to forge relationships that rule them all. Whether you are a data wizard, a curious hobbit, or somewhere in between, your models will never be the same.

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** GitHub Copilot is powerful, but what if you could scale from a solo AI assistant to an entire team of specialized agents working in parallel? This session introduces Squad: an open-source framework for multi-agent orchestration that lets you define teams of AI agents with specific roles, responsibilities, and expertise. We'll progress from Copilot basics to the Copilot CLI, explore how Agents add autonomy, and see how Instructions and Skills let you customize agent behavior. Then, the climax: a live demo where a Squad team of 3 agents (Lead, Developer, Tester) stands up and builds a working application in real-time, showcasing true multi-agent collaboration. Whether you're new to AI or exploring how to scale your use of Copilot, this session will show you what's possible when agents work as a team. **YouTube Link** TBD

We connect you with up to 30 Men or Women tennis partners close to your PLAYING REGION and skill level. This program is less competitive, no champions crowned, no league standings just dedicated tennis partners who want to meet up with you on the courts. Players will meet up to play a tennis match or just to hit around. Just go through the [Join Page](https://www.tenniscolumbus.com/partner-program) to enter this program. [https://www.tenniscolumbus.com/partner-program](https://www.tenniscolumbus.com/partner-program)

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!