Category Archives: Security Theater

Cryptojacking. How Hackers use your browser for Crypto-Currency Mining

Reality update: [1803.02887v1] A first look at browser-based Cryptojacking …:

In this paper, we examine the recent trend towards in-browser mining of cryptocurrencies; in particular, the mining of Monero through Coinhive and similar code- bases. In this model, a user visiting a website will download a JavaScript code that executes client-side in her browser, mines a cryptocurrency, typically without her consent or knowledge, and pays out the seigniorage to the website.

Facebook/Cambridge Analytica: When will the mainstream understand?

Reality update: This whole story about Facebook and Cambridge Analytica is not about a data breach, no. It’s the business model. It’s Facebook’s business model, and it has always been.

Facebook: is it time we all deleted our accounts? | Technology | The Guardian … Yes it is. Or let’s hear Mark Zuckerberg himself, in 2004:

“People just submitted it … I don’t know why … They ‘trust me’ … dumb fucks.”

A german university claims there’s child pornography in bitcoin’s blockchain

Looks like Child abuse imagery found within bitcoin’s blockchain | Technology | The Guardian is a good read …

“Researchers from the RWTH Aachen University, Germany found that around 1,600 files were currently stored in bitcoin’s blockchain. Of the files least eight were of sexual content, including one thought to be an image of child abuse and two that contain 274 links to child abuse content, 142 of which link to dark web services.”

A praise of Folly: Security Theater – The mostly unknown OSI Layer 8 and above

Early in February 2018 I was happy to give my Security Theater speech at FOSDEM, in Brussels. They booked me after Howard Chu and the closing keynote – awesome, and there were a few thousand geeks in the audience – I guess that was the largest crowd I ever spoke to, and it was big fun – have a look at the video. Before that event, I had enjoyed meeting politicians from the European parliament and had given an interview to the Radio Berlin Brandenburg about the darknet.

Here ( is where you find all material about this talk. Theres  the slides, the video and a big thank you goes out to Julia Reda’s for making the video for the FOSDEM Hackers. On top, I was asked for an interview about my presentation way before FOSDEM, here’s the link.

Apple: Clean Cobalt – BMW: Certified Clean Cobalt with Blockchain!

The interesting thing about this story (thanks to Fefe!) is not that BMW is using Blockchain now. And it’s not that they go for Cobalt from Congo for their batteries. That all makes perfect sense, given that you want to prove with a probably unhackable certificate story that your Kobalt mining activities do not harm locals or the environment. No, the really interesting part of the story is: BMW and Apple are now competitors. Yep, read that again.

90+ % pure Cobalt

(Alchemist-hp (talk) (, Pure (99%+) Cobalt, Wikimedia)

They used to be alliance friends, partners and we may remember iDrive and similar naming stuff – and the fact that you could only attach your iPhone to the BMW in a reasonable way. Now there’s Samsung-only keyless features for BMWs and Apple cars out there. Since Apple is investigating its capabilities in the electric, autonomous driving market, they more and more become a competitor to BMW.

At least when it’s about batteries and the much needed Cobalt ressources. These are mostly available in Africa, in Congo (80% says the article), and customers are very well aware by now of the blood diamonds and similar painful stories of exploitation.

So only a few days after Apple announced “that it will be negotiating directly with miners“, BMW’s partner Circulor steps in and snarkily comments “We believe it makes economic sense to start with sources that aren’t a problem” and:

… the trial of their blockchain supply chain solution allows supplying of a barcode to what is known as clean cobalt”, ie. cobalt that has been ethically sourced, and adds the key destinations of its trip to a ledger on their blockchain solution. Apart from proving the source of the cobalt and providing a record for it, the solution will likely also bring down regulatory compliance costs.

Five great security tools: SecureDrop, PGP, Signal, OpenVPN and Haven

The Blog Choosetoencrypt has presented three great tools for encryption. Under the title “Three Ways To Communicate Anonymously and Privately Online” they present and evaluate SecureDrop for filesharing (like a whistleblower, not a pirate), PGP for E-Mail and Signal for Instant messaging.

SecureDrop or similar is a mandatory category of tools for those who are dealing with journalists and can’t afford to be tracked.

The instant messenger Signal is being used and recommended by Edward Snowden, I use it every day, with all my phone numbers.

And so do I use PGP every day – find my Key(s) on the servers, among many old and lost and expired ones … Yes, I did many trainings in my life :-(.

And I was happy to meet and interview PGP-founder Phil Zimmermann, in late 2013, while deep in the belly of an old container ship named San Diego in the Hamburg harbor.)

But I also want to add two more tools:

OpenVPN – the best VPN solution that’s around  – Not only because I authored the first book and am still offering classes, but also because I have been using it every day since 2003 without any major outages or problems.

Haven – Also comes with the strong recommendation of Edward Snowden. This tiny Android app turns your old smartphone into a NSA device. Well, just kidding – that has already happened when you first switched it on. No, with Haven your smartphone becomes a motion detector, sound or movement activated alarm system for your home, car, whatever. Free of charge, open source. Here’s a review Techcrunch: “Edward Snowden’s new app turns any Android phone into a surveillance system”.