Free event: Introduction to Online Security

Saturday 24 January 2015
3:15 pm – 7:15 pm


Every week we hear about new hacks and bugs affecting individuals, companies or entire countries. Come spend an afternoon with us discussing the basics of how the Internet works, how its weaknesses are abused, and how individuals, developers, companies and governments can do their part to keep us safer online. Talks will be aimed at people with little or no IT background to introduce basic concepts of internet security, prompt discussion of recent news stories and recurring issues in online security and provide a foundation for future learning.

Topics introduced will include: Bad guys: who they are, what they want and how they get it. Security on public and private WiFi. Internet routing and website names (DNS). Introduction to cryptography. Website certificates. Email encryption. Signed messages and signed software.

RSVP (optional) via the event’s page at

Image by intersectionconsulting (CC BY-NC)

Julia Longtin to present at @31c3

Cast aluminum part fabbed via lost PLA with aluminum melted using kiln made from consumer microwave oven magnetron.HacDC member Julia Longtin will give a talk at the upcoming 31st annual Chaos Computer Club Congress in Hamburg, Germany, Earth, Milky Way. She will lecture about a process she has been perfecting over the past year for 3D casting aluminum parts via the lost PLA method using repurposed consumer microwave ovens to liquify the metal.

We use microwaves to cast aluminum from 3D printed [PLA] objects. This gives us the ability to cast high quality 6040 aluminum pieces using a 3D printer and commercially available consumer microwaves.

We manufacture microwave safe kilns for melting aluminum. We create microwave transparent molds that allow us to burn out plastic without heating the mold itself there[by] creating a quicker method of accomplishing the lost PLA process.

Julia‘s process is being developed as a contribution to the larger FOSSCar initiative, which aims to use an open source production and development model and recycled materials including refurbished and repurposed off-the-shelf technology to fabricate a road-worthy car.

Cryptoparty 2014 – Hi my name is Ed


press-release dated 17 September 2014


For Immediate Release

Who: HacDC

What: CryptoParty 2014: "Hi, my name is Ed."

Where: HacDC, 1525 Newton Street NW, Washington DC 20015 USA

voice: 202-556-4225 |

(Entrance is behind St. Stephen and the Incarnation Episcopal Church, via reddish door on 16th St NW, NOT via Newton St NW).

Geolocation: 38.93374, -77.03546

When: 20 Sept 2014 at 2pm ET


There has been heightening awareness about online security over recent years. The Snowden revelations have made the topic gain prominence with the main stream media and the general public. Concerns have been further amplified by widely publicized personal data thefts from large companies’ systems, vulnerabilities found in widely used networking software, the growing inadequacy of passwords as a means to maintain data security, and the privacy concerns raised by social media corporations’ use of our lives’ data streams. The topic is one that renders otherwise informed people powerless with its confounding technical issues and what to do about them. The CryptoParty format is meant to help educate lay and expert communities, and provide a friendly place for ad hoc Q&A.

Contact media inquiries: email hidden; JavaScript is required


Local DC hackerspace, HacDC, is hosting its 3rd annual CryptoParty. This event is aimed at all levels of computer expertise including anyone interested in cryptography, securing their information and identity on the Internet, and in the socioeconomic issues surrounding data privacy.

Talks have been scheduled on strengthening the security of email, WiFi, passwords, web browsing, and more. Speakers on topics relevant to public policy and legislative agendas are in the pipeline. Mini-workshops will be conducted on setting up encrypted email, placing secure phone calls, password management, and more. Two tracks are planned for novice and expert participants, respectively.

If anyone has knowledge to share in the form of a structured or ad hoc talk, would like to propose and run a mini-workshop, or volunteer for conference day logistical support, they are asked to contact email hidden; JavaScript is required to introduce themselves.

Twitter @cryptopartyDC

RSVP on (not required but useful for planning purposes):

Event page at

Event Google Doc:

Some speakers to-date

Arshad Noor is the CTO of StrongAuth, Inc., a Silicon Valley company focused on cryptographic key-management for more than 13 years. He has authored/designed open-source cryptographic tools: CSRTool, StrongKey, CryptoEngine and CryptoCabinet, written many papers/articles: Identity Protection Factor, Regulatory Compliant Cloud Computing, Data Encryption Infrastructure, etc. – and has spoken around the world at conferences hosted by RSA, NIST, ISACA, ISSA, ISSE, OWASP, CARTES, ABA and others.

Ben the Pyrate is a programmer, hacker, and social justice activist. Ben is a long time member of HacDC and one of the founding members of Project Byzantium. Having been obsessed with crypto since childhood, he is always looking for opportunities to share his passion for secret messages.

Hank Leininger has been breaking stuff and building stuff for a while. While playing defense, he wrote the HAP-Linux kernel hardening patches in the late ‘90s, which have been a part of GRSecurity since the 2.4 kernel series. In 2004 Mr Leininger co-founded KoreLogic, Inc., an expert security consulting practice. He does not have any interesting letters after his name.

Joe Klein, has played all roles in the security business over the last 30 years. As a researcher he developed the first IPv6 IDS, a Predictive Internet Threat Intelligence system, sensor networks security, hacked cars and other things that move, hacked time, and now runs a company creating the next generation security systems, based on biologically inspired methods and practices.  He also has patents and provisionally patents including  one in ‘Integrated cyber network security system and methods’.  When not geeking on technology, life is about training for triathlons, hanging out with friends at ‘hacker spaces’ and conferences, and enjoying an amazing life.

Mark is currently the Chief of Incident Management for a Industrial Control Systems (ICS/SCADA) focused response team where he has served in a variety of roles for the past 6 years.  Mark has previously done consulting in web application security, penetration testing and critical infrastructure security.  Mark has a BS in Computer Engineering from The Pennsylvania State University.

Zak Zebrowski is a data miner, specializing in forensic database analysis. He is interested in all things Perl, and enjoys teaching. 

HacDC is a member-operated community organization in Washington, D.C. devoted to collaboration in the creative use of technology. Founded in 2008 by a diverse group of engineers, artists, and hobbyists, HacDC hosts free and open activities to share knowledge, skills, and ideas. It features a meeting space and a workshop stocked with specialized tools and supplies useful for the collaborative development of technological and artistic projects. Visitors are encouraged to call before coming to make sure a member is available to show them around. +1.202-556-4225

HacDC is a District of Columbia Non-Profit Corporation, incorporated on March 26, 2008 (file number 280867), and organized exclusively for charitable, educational, and scientific purposes within the meaning of Section 501(c)(3) of the Internal Revenue Code.




Jiffy 3D Aluminum

HacDC community member Julia Longtin and collaborator, Mason Mooney, have been developing a fascinating method to 3D print aluminum via a lost PLA method. It is remarkable for its use of commonly available consumer products such as microwave ovens, sugar, and hair spray. They have posted it to Hackaday and we are sure you'd agree that it deserves as many up votes as possible! Please spread the word if you agree!

Finished aluminum part, after removing from mold

“Our system uses consumer microwave units to perform burn-out of PLA from molds, and a second microwave to liquify aluminium, to be poured into the mold. 3d printer inspired mechanics will move the aluminium from the microwave, into the target mold under human control across the network, so that there is no risk to the person operating the machine.

“Lost PLA is usually dangerous, and time consuming. with this, we can go from [PLA] printed part to cast aluminium part in 3 hours!”

UPDATE (8/20/14): Julia et al. made the front of Hackaday!