Crypto Sec

Security researcher wonk, community-based geekery, rockin' IoT, fan of things that fly more than once.

[Crypto Sec @crypto_sec]

📣 New Podcast! "Why Asia-Pacific matters in cybersecurity - AVAR edition" on @Spreaker https://t.co/YUDUOPS5R4

[Crypto Sec @crypto_sec]

@michaeljknowles Where's the AI?

[Crypto Sec @crypto_sec]

Your regular browser may not be secure enough for modern threats, enterprise browsers can help. https://t.co/N0JXQUB3MX

[Crypto Sec @crypto_sec]

📣 New Podcast! "Blackhat - AI won't solve everything (but it might help some)" on @Spreaker https://t.co/UuOYKimyqz

[Crypto Sec @crypto_sec]

Local guy running for School Board can't spell school on the application, even after deleting the second 'L' :)

[Crypto Sec @crypto_sec]

Who was chasing you?

[Jake Moore @JakeMooreUK]

At the start of the year I planned to run 500 miles in 2024 but I hit that today and before November!

[Crypto Sec @crypto_sec]

Good simple explanation of the foundation of power supplies and rectifiers.

[ElectronicsNotes by Ian Poole @ElecNotes]

Diode Rectifier Circuits Infographic

I've updated this infographic a bit. In it I've shown the common types of diode rectifier circuits that are used within linear power supplies and many other circuits, and the output waveforms are shown.

There are several different rectifier circuits that are in common use and each has its own properties, characteristics and capabilities.

Some are applicable to some situations, whereas other circuits to different situations.

To select the best circuit for the particular circuit and situation, it helps to have a quick summary of the various common rectifier circuit configurations:

- No rectifier:   For this circuit, the output from the transformer is applied directly to the load which sees a full wave alternating voltage.

- Half wave rectifier:   This is the simplest rectifier circuit and it uses a single diode to provide half wave rectification. Half the waveform is passed through the diode leaving the remaining half blocked. The peak of the waveform of 1.414 times the RMS value of the transformer output less a single diode drop.

- Full wave rectifier using a centre tapped transformer:   This circuit uses two diodes to provide full wave rectification utilising both halves of the waveform. The peak voltage output is 1.414 times the RMS voltage from the transformer less a single diode drop. The disadvantage is that this requires a more expensive transformer and each half of the winding is only used for half the cycle.

- Full wave rectifier using bridge rectifier:   This circuit uses a transformer with a single winding and no centre tap on the output to provide full wave rectification. The peak output voltage is 1.1414 times the RMS voltage of the transformer output less two diode drops.

- Full wave bridge rectifier with smoothing:   This circuit uses a full wave bridge rectifier with a capacitor to provide smoothing. Some ripple remains as can be seen, but it is much better than if a half wave rectifier had been used. A voltage regulator may be used to provide a fully regulated output.

I havent shown the full wave rectifier with a pi circuit including an inductor as these are less widely used now.

[Crypto Sec @crypto_sec]

nice easy to understand video on user/kernel mode that normal(ish) people can understand, good job!

[Dave W Plummer @davepl1968]

Kernel Mode vs User Mode explained by a retired Windows developer!

[Crypto Sec @crypto_sec]

it makes a certain kind of sense - especially if you've taken a LOT of drugs

[Ethan Jackson @ETH4N3T]

Remember peeps, always put a WiFi password on your router, otherwise you might be next 😅

[Sara Fischer @sarafischer]

.@nytimes sues @OpenAI and @Microsoft for copyright infringement
— This is a big deal because it could set a precedent for 1. How courts define the value of news content in training large language models and 2. What the damages are for previous use
@axios
https://t.co/RPvSYunK4A

[Crypto Sec @crypto_sec]

nice iPhone exploits, 4 of them in a cozy exploit chain https://t.co/RbrlLzJCAG @dangoodin001

[Crypto Sec @crypto_sec]

computer?

[Aryeh Goretsky {@infosec.exchange} @goretsky]

So, this box from @Lenovo arrived. Seems pretty big, too. I wonder what's inside?

[Crypto Sec @crypto_sec]

wait, you want to be able to work on things you own and paid for <gasp>

[Paul Roberts @paulfroberts]

"Leslie Giroux of Westbrook said it was important to support small independent repair shops, like the ones in her neighborhood that people have grown to trust.

“Not everyone can afford the dealership,” she said of her “yes” vote.

[Crypto Sec @crypto_sec]

Next level babysitting :)

[Out of Context Human Race @NoContextHumans]

https://t.co/INalAfwvsW

[Crypto Sec @crypto_sec]

because Esc-:wq is still just soooo intuitive vs. you know, save and exit. All I use though :)

[It's FOSS @Itsfoss]

Vim turns 32 today! 🎂 🐧

Share your experience with Vim 🙂

#opensource

[Crypto Sec @crypto_sec]

No reason to leave this stage really, right? :)

[Andrew MacRae @TheAndrewMacRae]

Uh oh … we’ve now reached the “wrap things in aluminum foil and see if that fixes things” stage of the experiment.

[Proton @ProtonPrivacy]

As the #OnlineSafetyAct becomes law in the #UK without critical legal safeguards to end-to-end encryption,  the internet as we know it faces a very real threat: https://t.co/5C1M6W77OT

The Act could give the UK government the power to access, collect, and read anyone’s private conversations at any time. The UK Government has previously admitted that the proposals are "technically unfeasible," and we hope @Ofcom keeps this front of mind during the implementation process.

European lawmakers also need to acknowledge this when considering similar legislation in the EU. It's not too late to stop #chatcontrol, and we encourage all of our EU-based users to contact their MEPs about this.

Proton will not comply with any measures to weaken encryption for our UK users. While no one objects to increased online safety, we believe that it shouldn't come at the expense of the fundamental right to privacy. We don't believe that the majority of Proton's services will fall under the scope of the OSA; however, should we receive any requests under the Act to alter our encryption, we will be prepared to fight through legal means.

[Crypto Sec @crypto_sec]

I'm still on numbers and counting, at least there's a future for me in spreadsheets :)

[Crypto Sec @crypto_sec]

Feelin' the PUA love :) https://t.co/gLQTbtql3g

[Crypto Sec @crypto_sec]

Going to speak at Virus Bulletin about dirt cheap corporate backdoors people aren't really thinking about: e-waste with your whole routing environment still on them.