Collaborate Disseminate
Examining the backdoor’s DNS communications led researchers to find a government agency and a big U.S. telco that were flagged for further exploitation in the spy campaign. Continue reading Sunburst’s C2 Secrets Reveal Second-Stage SolarWinds Victims
Walking is great exercise, but it’s good for the mind too: it gives one time to observe and to think. At least that’s what I do on my daily walks, and being me, what I usually observe and think about is the local infrastructure along my route. Recently, I was …read more
Continue reading Ask Hackaday: With Landline Use in Decline, What’s to be Done with the Local Loop?
Telmate, a company that facilitates monitored inmate communications with the outside world, has exposed a large database containing tens of millions of call logs, private messages, and personal information about inmates and their contacts. Bob Diachenk… Continue reading US Phone Service Exposes Millions of Messages Between Inmates and Their Friends and Families
Anyone who was active in the phreaking scene or was even the least bit curious about the phone system back in the Ma Bell days no doubt remembers the carbon capsule microphone in the mouthpiece of many telephone handsets. With carbon granules sandwiched between a diaphragm and a metal plate, …read more
Continue reading Wood and Carbon Rods Used for This Handsome and Effective Microphone
It used to be that time was a lot more relative than it is today. With smartphones synced to GPS and network providers’ clocks, we all pretty much have access to an authoritative current time, giving few of us today the wiggle room to explain a tardy arrival at work …read more
Continue reading Retrotechtacular: The Speaking Clock Goes Silent
When it comes to cybersecurity the telecommunications sector is widely viewed as one of the most vulnerable to cyber security attacks. According to a recent report from Efficient 43% of telecommunication organisations have suffered a DNS-malware … Continue reading The Importance of Cyber-security in the world of Telecommunications
Back in the 70s when I started getting interested in electronics, tons of magazines catered to the hobbyist market. Popular Electronics was my favorite, and I think I remember the advertisements more than anything, probably because they outnumbered articles by a large margin. Looking back, it seemed like a lot of ad space was sold to companies hawking the tools and materials needed for wire wrapping, which was very popular for prototyping in the days before solderless breadboards were readily available. I remember beauty shots of neat rows of small, gold posts, with stripped wires wrapped evenly around them.
To …read more
Continue reading Ask Hackaday: Whatever Happened to Wire Wrapping?
Inflect, a startup that wants to make it easier for businesses to buy their own internet infrastructure, today announced that it has raised a $3 million seed funding round. The service, which is still in preview, provides business with the necess… Continue reading Inflect raises $3M seed round to make buying internet infrastructure easier
In the first part of our series on in-band signaling, we discussed one of the most common and easily recognizable forms of audio control, familiar to anyone who has dialed a phone in the last fifty years – dual-tone multifrequency (DTMF) dialing. Our second installment will look at an in-band signaling method that far fewer people have heard, precisely because it was designed to be sub-audible — coded squelch systems for public service and other radio services.
To review, an in-band signaling system is loosely defined as any system that sends control information along with the main content …read more
One late night many decades ago, I chanced upon a technical description of the Touch-Tone system. The book I was reading had an explanation of how each key on a telephone sends a combination of two tones down the wire, and what’s more, it listed the seven audio frequencies needed for the standard 12-key dial pad. I gazed over at my Commodore 64, and inspiration hit — if I can use two of the C64’s three audio channels to generate the dual tones, I bet I can dial the phone! I sprang out of bed and started pecking out a …read more
Continue reading In-Band Signaling: Dual-Tone Multifrequency Dialing
