Archive for June 2019

Socket tester tested

An electrical outlet tester, receptacle tester or socket tester is a device used to verify that an electrical wall outlet is connected correctly. It confirms continuity and polarity of the electrical connections. The outlet tester is designed to check that each contact in the outlet is connected to the proper wire in the building’s wiring.

Raspberry PI 4 Released

Raspberry Pi 4 was just released: Faster CPU, More Memory, Dual HDMI Ports. A new version of the $35 computer features a 1.5GHz Arm chip and support for dual-HDMI 4K displays, Gigabit Ethernet, and much more. This credit card size Raspberry PI 4 desktop computer level of performance. Raspberry Pi 4 is now on sale,

Linux TCP SACK and PTP vulnerabilities

Linux PCs, Servers, Gadgets Can Be Crashed by ‘Ping of Death’ Network Packets writes that it is possible to crash and slow-down network-facing Linux servers, PCs, smartphones and tablets, and gadgets, by sending them a series of maliciously crafted packets. Netflix has published a security paper with many details. There are four vulnerabilities, three of

Blame the user game

Earlier it was said “customer is always right” but now the in digitak world it seems to have turned to “always claim it is user’s fault”. “The simple act of using Facebook, Snyder claimed, negated any user’s expectation of privacy. An outside party can’t violate what you yourself destroyed, Snyder seemed to suggest.” IN COURT,

Power grid hacking in USA and Russia

Electrical power grid hacking meets cyber war politics talk? Or just fear-mongering and fake news? What would happen if someone switches off the power fron your country? Russian hackers behind ‘world’s most murderous malware’ probing U.S. power grid Kremlin Warns of Cyberwar After Report of U.S. Hacking Into Russian Power Grid

Encryption won’t work if it has a back door only the ‘good guys’ have keys to | Technology | The Guardian This article from few years back is still relevant, because this same stupid idea becomes re-introduced as proposed “solution” in different countries again and again. It’s impossible to overstate how bonkers the idea of sabotaging cryptography is. Use deliberately compromised cryptography, that has a back door that only the “good guys” are supposed to

LED flashlight battery holder resistance

I had some broked LED flashlights and I thought of using components from them. Especially the compact battery holder that takes three AAA batteries looks useful in other small projects. Those worked OK when lightly loaded. But when I started taking current for a small motor, I could not get acceptable power out of them.