Security researchers have recently discovered a botnet with a novel defense against takedowns. Normally, authorities can disable a botnet by taking over its command-and-control server. With nowhere to go for instructions, the botnet is rendered useless. But over the years, botnet designers have come up with ways to make this counterattack harder. Now the content-delivery network Akamai has reported on a new method: a botnet that uses the Bitcoin blockchain ledger. Since the blockchain is globally accessible and hard to take down, the botnet’s operators appear to be safe.
It’s best to avoid explaining the mathematics of Bitcoin’s blockchain but to understand the colossal implications here, you need to understand one concept. Blockchains are a type of “distributed ledger”: a record of all transactions since the beginning, and everyone using the blockchain needs to have access to—and reference—a copy of it. What if someone puts illegal material in the blockchain? Either everyone has a copy of it, or the blockchain’s security fails.
To be fair, not absolutely everyone who uses a blockchain holds a copy of the entire ledger. Many who buy cryptocurrencies like Bitcoin and Ethereum don’t bother using the ledger to verify their purchase. Many don’t actually hold the currency outright, and instead, trust an exchange to do the transactions and hold the coins. But people need to continually verify the blockchain’s history on the ledger for the system to be secure. If they stopped, then it would be trivial to forge coins. That’s how the system works.
Kraków, written in English as Krakow and traditionally known as Cracow, is the second-largest and one of the oldest cities in Poland. Situated on the Vistula River in Lesser Poland Province, the city dates back to the 7th century. Kraków was the official capital of Poland until 1596 and has traditionally been one of the leading centres of Polish academic, economic, cultural and artistic life. Cited as one of Europe’s most beautiful cities, its Old Town has declared the first UNESCO World Heritage Site in the world.
The city has grown from a Stone Age settlement to Poland’s second-most-important city. It began as a hamlet on Wawel Hill and was reported as a busy trading centre of Central Europe in 965. With the establishment of new universities and cultural venues at the emergence of the Second Polish Republic in 1918 and throughout the 20th century, Kraków reaffirmed its role as a major national academic and artistic centre. The city has a population of about 780,000, with approximately 8 million additional people living within a 100 km (62 mi) radius of its main square.
If you know anything about the Raven bookstore in Lawrence, Kansas, then you know that it charges more for books than Amazon. Advertising higher prices is an unlikely strategy for any business, but Danny Caine, Raven’s owner, has an M.F.A., not an M.B.A., and he talks openly with customers about why his books cost as much as they do. Two years ago, he took that conversation to social media, using the store’s Twitter account to explain why the Raven was charging twenty-six ninety-nine for a hardcover book that a customer had seen online for fifteen dollars. “When we order direct from publishers, we get a wholesale discount of 46% off the cover price,” Caine wrote. “Our cost for that book from the publishers would be $14.57. If we sold it for $15, we’d make . . . 43 cents.” Caine estimated that, with an inventory of some ten thousand books in the store, on a profit of less than fifty cents a book, the Raven could afford to stay open for about six days.
Amazon has a much larger inventory—not only of books but of other goods with much higher profit margins—as well as many other revenue streams. The company can afford to take a loss on books. “If you’ve ever wondered why it seems like ‘there are no bookstores anymore’ or why retail businesses keep closing in your downtown, this is it,” Caine wrote. The Raven can’t afford losses like Amazon, but almost every dollar that the store makes stays in Kansas: after the publisher’s cut, half of every book sold goes directly to employee wages; the other half goes to rent, marketing, and other operating costs, including store maintenance, the Web site, and food and veterinary care for the Raven’s most famous employees, the cats Dashiell (as in Hammett) and Ngaio (as in Marsh).
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Amazon can afford to take a loss on books. Small independent bookstores cannot. Illustration by Owen D. Pomery; Source photograph by Danny Caine
On a sunny day in early 2017, Sundar Pichai, Alphabet Inc.’s chief executive officer, returned to his alma mater, the Indian Institute of Technology Kharagpur, in West Bengal, to speak before 3,500 students. Welcomed as the “rock star” leader of the “world’s most innovative company,” he reminisced about skipping classes and meeting his college girlfriend—now his wife. He also pitched Google to the soon-to-be-graduates in attendance. How many wanted to work there, the interviewer asked. Hundreds of hands went up. “Wow, maybe we should open a campus in Kharagpur,” Pichai joked.
As far as feeder schools go, it doesn’t get much better for Google than the network of 23 ultracompetitive, government-funded IITs. Every year hundreds of their graduates join the world’s biggest tech companies. In 2003, when the school system celebrated its 50th anniversary, Bill Gates delivered a keynote speech praising grads who’d come to work at Microsoft Corp. over the years, noting that the company had, in turn, invested more money in the IITs than in any other institution outside the U.S. and the U.K.
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Amit Jatav at home as he tried to continue his studies with his university, IIT Delhi, going online. Behind him is a portrait of B.R. Ambedkar, a Dalit thinker, and activist who led the drafting of the Constitution of India and is responsible for the fight against caste discrimination in the country.
Photographer: Anshika Varma for Bloomberg Businessweek
The Czech Republic, also known by its short-form name, Czechia, is a landlocked country in Central Europe. It is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the east. The Czech Republic has a hilly landscape that covers an area of 78,866 square kilometers (30,450 sq mi) with a mostly temperate continental climate and oceanic climate. It is a unitary parliamentary republic. (Wikipedia)
With one of the highest densities of castles in the world, the Czech Republic contains many formidable chateaus. Spend the night in a fairytale fortress while discovering the beauty of Czechia beyond Prague city center. (theculturetrip)
It was March 23, 2018, just days after the revelation that Cambridge Analytica, a consultancy that worked on Donald Trump’s 2016 presidential election campaign, had surreptitiously siphoned the personal data of tens of millions of Americans from their Facebook accounts in an attempt to influence how they voted. It was the biggest privacy breach in Facebook’s history, and Quiñonero had been previously scheduled to speak at a conference on, among other things, “the intersection of AI, ethics, and privacy” at the company. He considered canceling, but after debating it with his communications director, he’d kept his allotted time.
As he stepped up to face the room, he began with an admission. “I’ve just had the hardest five days in my tenure at Facebook,” he remembers saying. “If there’s criticism, I’ll accept it.”
The Cambridge Analytica scandal would kick off Facebook’s largest publicity crisis ever. It compounded fears that the algorithms that determine what people see on the platform were amplifying fake news and hate speech, and that Russian hackers had weaponized them to try to sway the election in Trump’s favor. Millions began deleting the app; employees left in protest; the company’s market capitalization plunged by more than $100 billion after its July earnings call.
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The company’s AI algorithms gave it an insatiable habit for lies and hate speech. Now the man who built them can’t fix the problem.
In 1883, a Jerusalem antiquities dealer named Moses Wilhelm Shapira announced the discovery of a remarkable artifact: 15 manuscript fragments, supposedly discovered in a cave near the Dead Sea. Blackened with a pitch-like substance, their paleo-Hebrew script nearly illegible, they contained what Shapira claimed was the “original” Book of Deuteronomy, perhaps even Moses’ own copy.
The discovery drew newspaper headlines around the world, and Shapira offered the treasure to the British Museum for a million pounds. While the museum’s expert evaluated it, two fragments were put on display, attracting throngs of visitors, including Prime Minister William Gladstone.
Then disaster struck.
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In 1883, 15 manuscript fragments found near the Dead Sea caused an international sensation.
Illustration: Sam Whitney; Getty Images
The company’s AI algorithms gave it an insatiable habit for lies and hate speech. Now the man who built them can’t fix the problem.
