Sharan Kalwani, president of SEMCO, will start the meeting and make general announcements.
Since May 12, 2024 we have been using a Hybrid Zoom and IN PERSON format for our meetings.
For In Person location see below. Come and join us in person if you can.
Zoom details are same as before. Click here to be connected to the meeting.
Please join the meeting around 1:00 PM or later. This link will be active on the day of the meeting.
Members will also receive an e-mail on the day of the meeting, with the link and any further details and instructions about how to log into the meeting.
When: Sunday, July 13, 2025 at 1:15 P.M.
Where: In person at the office of i3Detroit, located at 1481-A Wordsworth St, Ferndale, MI 48220.
(For more detailed directions and parking information please click on the About SEMCO tab on this site).
SIG Computing Topic: Beginner’s Guide to Understanding Binary Logic & Encryption.
Presented by Jeff Pynnonen
We will first discuss simple binary logic (Boolean Logic). AND, OR, NOT. And move onto to SHIFTing, and the XOR(eXculsive OR)The Exclusive OR, XOR, is the basis of encryption. It basically flips or not flips bits in a message. I will show that with a key you can completely encrypt and decrypt messages (texts, data, and information).
Jeff is an engineer, with a BSEE from the University of Michigan, primarily involved circuit design and programming. He is experienced in C, C++, Visual Basic, Fortran, assembly language, and other languages.
Today, he likes Python and wants to learn Rust. He has worked doing data analysis for automotive customer experiences, developed a Computer Aided Phone Survey Interviewing Language (CAPSIL), allowing easy design of a survey, and easy to back up to correct wrong responses. He has also worked in programming in assembler code, C, C++ and other languages for automotive modules, like engine control, brake software, emission software, diagnostics, radio and entertainment systems.
.Also: Questions and Answers following the presentation.
When: Sunday, July 13, 2025 at 1:30 P.M.
Where: Meetings will be Hybrid in person and online. Details shown above.
SIG-Linux Topic: Network Analyzer demo
Presented by Sharan Kalwani
Network monitoring and analyzing used to be considered the domain of major enterprises and limited to big &%@ servers. However, even the little guy or home network users do have a need for knowing what is going on in their direct neck of the “cyberbit” woods. In the distant past, all we had was command line netstat and years of stumbling across interpretations of the cryptic output, or worse yet: swimming thru endless logs. Most folks don’t enjoy that at all. So an open source network analyzer with a GUI is generally welcome — and that’s where ntopng comes in.
Network “top” Next Generation is a tool we will give a demo of and see what it can tell us for our next SIG Linux session.
Sharan Kalwani is a High-Performance Computing Aficionado, a specialist for all things open source, soft skills, and contemporary IT Knowledge Expert. He is open to a wide variety of training & knowledge delivery projects.
Also: Questions and Answers following the presentation
When: Sunday, July 13, 2025 at 3:00 P.M.
Where: Meetings will be Hybrid in person and online. Details shown above.
Shortly after the meetings, the links to the recordings and/or comments will be posted here.
