Cryptography
Meet other local people interested in Cryptography: share experiences, inspire and encourage each other! Join a Cryptography group.
274,758
members
323
groups
Largest Cryptography groups
Newest Cryptography groups
Frequently Asked Questions
Yes! Check out cryptography events happening today here. These are in-person gatherings where you can meet fellow enthusiasts and participate in activities right now.
Discover all the cryptography events taking place this week here. Plan ahead and join exciting meetups throughout the week.
Absolutely! Find cryptography events near your location here. Connect with your local community and discover events within your area.
Cryptography Events Today
Join in-person Cryptography events happening right now
Secrets to Meditation: An Introduction to the Happiness Program
Discover the power of your breath to manage your mind and experience instant peace & calm.
Join a 60-minute free Workshop and get a glimpse of the Sudarshan KriyaTM-
The breathing technique that is revolutionizing the lives of millions.
What you’ll discover at ‘Beyond Breath’
✔ A taste of the Sudarshan KriyaTM, a breathing technique taught in the Happiness Program
✔ An instant energy booster that awakens & relaxes your mind - Take it home and practice daily!
✔ The peace & calm of a unique guided meditation
✔ Secret keys to manage your mind
✔ The power of surrounding yourself with positive, like-minded people.
You can use your breath to master your thoughts and emotions - the key to managing the quality of your day.
The Happiness Program
At the end of this workshop you may enroll into the Happiness Program (3 days, 3 hours each day) to learn the Sudarshan KriyaTM, a science-backed, rhythmic breathing technique through which you can:
Tap into a reservoir of energy and use it as you please!
Relieve deep-rooted stresses and anxieties
Uplevel your productivity
Overcome emotional blocks, move on from past events and shed limiting beliefs
Heal your body & gain power over your mind
Experience the true state of meditation
Learn more about the Happiness Program & the Sudarshan KriyaTM in our introductory workshop 'Secrets to Meditation'.
register: http://aolf.live/introSKY
Scanning Tunneling Microscope - Lab Day - Scanning Run - #15
Today we are Steve's Lab. RSVP and you'll be sent the location. It's in Silver Spring.
***Join us for an evening in an electronics lab where we will attempt to run clean scans of graphene and gold samples, and then clean up that data with post processing.*** This is a high sensitivity experiment, and we do not plan on being successful so early. But we've had promising results lately - so we will be putting in the time. We are NOT meeting at our usual location, but rather at Steve's house/lab.
If you RSVP, you will get a DM with the address but it's located in Silver Spring.
We will attempt full, clean lab - clean tip repeated scanning tests to see what we can learn and improve. We will experiment with online attendees, but if all possible showing up in person is strongly encouraged. Online join link is: - [https://meet.jit.si/mocomakers](https://meet.jit.si/mocomakers)
Our community is building (and documenting for other teams) how to build a scanning tunneling microscope using a mix of common and 3D printed parts. This will allow us to scan and visualize a single atom - an ambitious we are doing over the course of a few months.
The MoCo Makers community is one of the most innovative and competent groups in Maryland, and we've done everything from [publishing cancer research](https://pubmed.ncbi.nlm.nih.gov/38136356/), to [launching products](https://www.kickstarter.com/projects/gotim/cozy-curvy-multi-contour-pillow), [winning grants](https://covidinfocommons.datascience.columbia.edu/awards/2014255), and inspiring thousands.
Now our biggest challenge yet has appeared. We are building a Scanning Tunneling Microscope, that will allow us to scan and visualize single atoms.
To get a better idea of what we are doing, see our reference project here: [https://www.youtube.com/watch?v=7N3OqTEq08g](https://www.youtube.com/watch?v=7N3OqTEq08g)
All starting CAD, code, and reference files should exist. However, let's be the first Maker community to document the build process and share it with learners around the world.
We will be publishing our work here -[ https://hackaday.io/project/202816-qt-panda](https://hackaday.io/project/202816-qt-panda)
If you need a ride, let us know.
On https://blackecon101.podbean.com/ every Thursday at 6 pm
• What we'll do
On https://blackecon101.podbean.com/ Thursdays at 6 pm. discussing the economy....
Crystal City Commander Night
Come play some casual Commander at Crystal City! Bring your favorite decks for some pickup games, and feel free to bring your trade binders if you'd like!
**On Sundays, we play at the bar in the Crystal City Alamo Drafthouse located at 1660 Crystal Drive, Arlington, VA.**
If you have any questions, please join our Discord for the most up-to-date information: https://discord.gg/fBUWvrAVMv
6 Miles Hiking In Arlington
We will start at the Four Mile Run Trail Parking Area in Bluemont Park, follow the Four Mile Run Trail to Columbia Pike, then return and take the Lubber Run Trail to complete a 6-mile loop
Exact location to meet
[https://goo.gl/maps/mdHTq7ucwKdBpAH4](https://goo.gl/maps/mdHTq7ucwKdBpAH46)
Cost: Free
Walking speed: 2.5 -3 mph
Note:
We start on time, so please arrive early or on time to join the group
Dinner:
At the end of the walk, we’ll take a vote for dinner. If more than 5 people choose to join, we’ll go to dinner, otherwise, we’ll skip dinner
Thursday Night Trivia - Clear Skies Meadery
Trivia!!
Trivia starts promptly at 7, come earlier to get set up 630-645.
Clear Sky's Meadery.
15201 Display Ct, Rockville, MD 20850
DC Metro Crafts First Thursday meetup @ SW Library
Join DC Metro Crafts for our first Thursday meetup. Bring your own cross stitch, knitting, crochet, or other portable craft.
The Southwest Library is right off the Waterfront Metro. We'll be in Meeting Room 1. Go through both glass double doors and loop around to the right to find us. There are plenty of tables to spread out.
Cryptography Events This Week
Discover what is happening in the next few days
Photograph Kenilworth Aquatic Gardens July 4th
In previous years, the rangers said they try to get to the park and open the gate by 7:45 AM.
From the website:
[https://www.nps.gov/keaq/index.htm](https://www.nps.gov/keaq/index.htm)
Waterlilies are bountiful all over the park! Our volunteers moved the tropical lilies from the hothouses to the display ponds, and they are vibrant. Bird enthusiasts have been enjoying watching the 3 young fledgling red-shouldered hawks, nesting orchard orioles, and kingbirds. Turtles have been laying eggs, and tadpoles and frogs are abundant in the ponds.
Every year, we visit Kenilworth Aquatic Gardens on July 4th. The lotus flowers start blooming in early June and will be plentiful by the end of the month. The best time to visit is in the morning, as the temperatures are cooler and the flowers close up in the heat of the day, usually around 1:30 pm.
I know it is outside of the Virginia Beltway, but it is not far. It is a very unique place in Washington, DC. I will be there in my grey pickup and rain or shine (hopefully shine)!
Bring:
Tripod
Comfortable shoes
Water
Fully charged batteries
Empty memory cards
Rain poncho and plastic bags for the camera and lens in case of rain.
Share only your very best, most interesting shots after the field trip, and keep it down to between 5 and 10 photos.
Park Facts
Entrance Fee: Free
Allow Dogs with lease: No
Bathroom: Restroom in the Visitor Center
Address: 1550 Anacostia Ave, NE, Washington D.C. 20019
Lat, Long: 38.913003, -76.940142 - Parking Lot
Plus Code: W375+6W Washington, District of Columbia
Website: https://www.nps.gov/keaq/index.htm
I generally schedule this meetup on the Fourth of July, as I would have the day off. They are open on July 4th, but one year we waited until 9:00 AM until a ranger showed up to unlock the gate, and it wasn’t a holiday. I also want to mention security, as in the past, a photographer in my group was at the gardens and saw someone’s car being broken into in the parking lot.
From the parking lot, walk towards the gardens down the path. I usually stay to the left and head into the lotus fields. Please be careful, as there are just dirt paths between the fields, and if there has been a lot of rain, there can be ruts, and I almost twisted my ankle.
You actually need a fairly long lens, as the lotus flowers are tall and can be some distance away. A wide angle is only good for some overall shots, and a good-sized macro works as well. Another thing folks do not realize is that the flowers do bloom into September, but have many full blooms. This is one park where you do not have to worry about mosquitoes, as they are eaten by pond beetles, dragonflies, and damselfly larvae, and also by frogs and birds.
There is a boardwalk at the back of the flower fields that goes out to a marsh area. I have seen many types of birds and dragonflies in that area. Being there makes it hard to believe that you are in Washington, DC.
On the way out, allow some time to check out the small ponds with different lotus and lilies that also attract frogs and dragonflies.
Why you will not see any mosquitoes in the park:
https://www.nps.gov/keaq/learn/nature/insects.htm
By sending in an RSVP and joining this meetup event hosted by the Virginia Beltway Photography Meetup, I am also agreeing to the terms of the following release and waiver of liability, which shall be binding on my heirs, executors, administrators, successors, and assigns. In consideration of my (and my child’s) participation in the Virginia Beltway Photography Meetup, I do hereby release, discharge, and hold harmless the Organizer, its members, officers, directors, employees, and the leader(s) of this event from any and all liability by reason of any damage, loss, expenses, or injury arising from my (and my child’s) participation in this event, including that caused solely or in part by the fault of any and all of the above-named parties.
A Poetry Workshop
Hey Poetry Lovers!
This group is on a roll. Here’s the gist:
We meet at the **Capital One Café in Chinatown** from **12pm - 2pm** every other week.
For enrichment, we start by reading and reflecting on a **“published poem”**, suggested by someone in the group. No advance preparation is necessary. But feel free to check out some of the poems we’ve read [here](https://docs.google.com/spreadsheets/d/e/2PACX-1vSyE_wCLQCPHRrKmN5F9tOIeeRQUZESxjRXGVBoCF2uU8Gm0_d0uECiCBCQXEy6ksxfsBOhtRIOpW3T/pubhtml?gid=0&single=true&widget=true&headers=false%22%3E%3C/iframe%3E). Or submit suggestions for future meetings [here](https://docs.google.com/forms/d/e/1FAIpQLSexGc2Z2Kp6bZW0D3_hfJ7NUUkfNHf7TXX-43FglCeBd9EF2Q/viewform?usp=send_form).
Next, we **share our work and offer feedback**. Depending on attendance, everyone gets \~10 minutes to use as they like. (No need to share, though; you’re welcome to come even if you prefer just to listen.)
We maintain a **Discord server** to help share our work and communicate outside our bi-weekly meet-ups. If you haven’t used Discord before, take a moment to download it and create an account before arriving. When we meet you on Saturday, we will add you to our server, the “DC Poetry Workshop”, and can help you navigate the app if you have questions.
Finally, if you plan on sharing a poem, consider how you will do so. Some options include:
* Print 5-10 copies to distribute in person
* Take and share screenshots in the Discord chat.
* Copy the poem into a google doc, change sharing settings to “anyone with link”, and copy the google doc link into the Discord chat.
Most importantly, we’re excited to meet you!
Catch you on Saturday,
Diego / Ian / Cayden / Nate / Otasha / Lia / An
Yoga Therapy: My Body Don't Bend That Way - Therapeutic Yoga
Think you aren't flexible enough for yoga? Afraid to get onto the floor? Living with physical aches or restricted range of motion? Then this is the perfect yoga class for you! Explore your body's strengths in a fun, supportive environment while maintaining and growing your range of motion, flexibility, balance, strength, and sense of peace. All are welcome in this therapeutic class.
Come ready to try new things, laugh, ask questions, and support each other.
**Please reserve your spot at www.piesfitnessyoga.com.** The session is offered both InStudio and OnLine. The Zoom link for the OnLine session will be emailed 15 minutes before class starts to those who are registered at www.piesfitnessyoga.com. **Sign up for sessions must be made at least 2 hours prior to class.**
The address is 1322 Prince St Alexandria, VA 22314.
Our entrance is located on the side of the building, parallel to West St. **Street parking is available and additional parking is located at Shiloh Baptist church, spaces 3,5,7,9.** The church is located across the street from the studio, on the corner of Duke St. and West St.
Discount is available to seniors, teachers, students, emergency responders, and military. All can save by purchasing class packs.
Cuban Salsa/Rueda de Casino Class & Social Dancing
Danceintime runs Cuban Salsa Classes & Social Dancing Every Saturday, all year-long. Come at 1:15 pm to sign in. Stay till 4 pm.
Some of us go out for coffee or a bite to eat afterwards and everyone is welcome!
$15/person. Cash, PayPal, Venmo, Apple Pay, or Card accepted.
Chevy Chase Baptist Church; 5671 Western Ave. NW; Washington DC 20015. NOTE: Enter through back corner door of the church.
Danceintime classes are great fun. The dance moves are beautiful, fun, and our class creates a bonded community... Check it out! Class will be held every Saturday in December....celebrate the holidays with dance!
For more info: danceintime.com/classes
Questions? Contact Barbbernsteintalks@gmail.com
Crystal Ashram Monthly Meditation in Burke
**Come enjoy a unique musical experience called a "Sound Bath"**
**Sound bath! What’s that?**
**According to a member of our community from Annapolis MD, “A sound bath is an immersion in sound frequency that cleanses your soul.”**
**Rubber Duckies not required.**
**Get ready for this super relaxing immersion!**
**According to cutting-edge doctors from Harvard, some of the deepest, most profound healing in the body are accomplished with sound frequency.**
**That’s old news, though.**
**A 2nd century stone relief in the Himalayan mountains shows Buddha and his buddies playing ancient Tibetan singing bowls.**
**A sound frequency specialist with the Human Activation School of Expanded Consciousness, will be playing several of these rare Singing Bowls, some of which are over 200 years old.**
**A magical alchemy of 7-12 different metals rings in the past, present, and future for our relaxing enchantment.**
**Experience these gifts from the past in this non-religious practice of our present. Come be rejuvenated, or just captivated, by this unique musical experience.**
***Did You Know?***
**Mitchel Gaynor, Cornell Medical College's Center for Integrative Medicine director of medical oncology, is renowned for Tibetan Singing bowls successfully being used in his medical practice?**
**"The peace, strength, and confidence this experience has given me has made me want to explore meditation. It’s given me a whole new perspective. My intuition feels incredibly enhanced and my sense of awareness has expanded. I’ve never felt better than I do now!"- MM**
**Each month on the first Sunday we will be coming together as a community for a Unique sound bath offering in Burke VA. Every month will be something new ranging from different chakra centered meditations, Gong Baths, and even unique themed meditations honoring the whales and elephants of our sacred Mother Earth.**
**Bring your pillows, blankets, and yoga mats and snuggle into the comfort of the tranquil sounds. Feel free to sit, lay, or even stand! First-timers welcome.**
**7:00 pm - Meditation Reception**
***\*\*Meditation in our sacred space will begin promptly at 7:30 pm. Please refrain from entering after 7:30 pm.\*\****
**7:30 - Doors Close & Meditation Begins**
**8:30 - Meditation Ends**
**Contemplative Conversation will follow after the collective experience is complete.**
**Suggested energy exchange, sliding scale between $15 - $30.**
**All proceeds go to support the Crystal Ashram 501(c)(3) non-profit.**
Cryptography Events Near You
Connect with your local Cryptography community
Cocoaheads
We have moved to guild.host. Look us up there.
https://guild.host/events/buckeye-cocoaheads-rcavwd
BeComing Circle Initiates
http://photos2.meetupstatic.com/photos/event/2/a/9/6/600_348310902.jpeg
Instructor - Crow, HPS
Class fee is $30 at the door or approved exchange
RSVP with Advance pay of $25 (discounted) by PayPal on the web or by contacting Enchanted Elements (614) 437-2642.
Reservations made directly to Enchanted Elements will be added to the class list manually not online.
Private Instruction ~ Closed to the Public ~ Initiated Members Only
Please come prepared for ritual.
Blessings ~ Crow
Directing and Lighting Your Shoot
**Don’t miss your opportunity to learn from a duo with over 16 years of experience combined. During this demonstration event, you can expect to learn how to direct and guide your creative vision through lighting and communication to your model. We guarantee you will leave this event feeling more confident to try new lighting set ups to match up with your anticipated outcome. Finding the right way to express your vision is key to getting your model to pose accordingly, so we got you there too! To take this even further, think about signing up for a tutorial spot following the demonstration.**
***Note: this is a demonstration event only, you will not shoot your own images. However, if you bring your camera we can test it for compatibility with the studio lights.***
**Following the demonstration will be a tutorial/coaching event - sign up separately if you are interested at**
https://calendar.app.google/ZcHb4CQB2rrV3U7j9
**Save and book both for $199 (discounted from $215; the discount will be applied on the Tutorial invoice).**
Stop Guessing: How to Measure and Improve LLM Outputs
Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on.
That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable.
In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork.
This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it.
We’ll cover:
* Why “it looks good” is not enough
* How to improve prompts by changing the input, context, and constraints
* How to compare LLM outputs more systematically
* Basic evaluation techniques for accuracy, consistency, and usefulness
* How embeddings, cosine similarity, and scoring can help evaluate results
* Where automated evaluation works — and where humans still need to stay in the loop
By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve.
LOGISTICS AND PARKING:
The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks!
The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.
IxDA Chat n Pancakes
You can sleep in on the Sesquicentennial (observed), we’re shifting to the following Friday.
But join the local UX community for a chat and some biscuits to catch up. If you were in CA for Figma Config, tell us all the lines and you can tell me how I can animate an SVG without coding it by hand, and why I’d even want to.
Thanks to the team at Nationwide of supporting the group.
Azure CBUS July
Want to be a speaker? submit your talk to our Call for Presenters!!!
https://sessionize.com/azure-cbus-2026/






























