Writing in Analytical Chemistry, Paige Hinners and Young Jin Lee of Iowa State University say they have figured out an accurate way to data to within 24 hours when a fingerprint under a week old was made — and thus whether it is associated with a crime temporally, as well as spatially. The Economist reports: They knew from work conducted by other laboratories that the triglyceride oils contained in fingerprints change by oxidation over the course of time. That provides an obvious way to date prints. The problem is that the techniques which have been applied to analyze these oils are able to distinguish age only crudely. In practice, they can determine whether or not a print is over a week old, but nothing else. Dr Hinners and Dr Lee wondered if higher precision could be obtained by thinking a bit more about oxidation. Oxygen molecules in the air come in two varieties. Most have a pair of atoms but some, known as ozone, have three. Though far rarer than diatomic oxygen, ozone is more reactive and also reacts in ways different from those of its two-atomed cousin. The two researchers therefore decided to focus their attentions on ozonolysis, as triatomic oxidation is known.

Triglycerides, as their name suggests, are three-tailed molecules. Each tail is a chain of carbon atoms, with hydrogen atoms bonded to the carbons. The chains are held together by bonds between the carbon atoms. These are of two varieties, known as single and double bonds. Single bonds are, in chemistry-speak, saturated, and double bonds unsaturated. By extension, molecules with one or more double bonds in them are also referred to as unsaturated, while those with only single bonds are called saturated. Unsaturated bonds are more reactive, and it is here that ozonolysis does its work. Ozone breaks up triglycerides at their double bonds, with one or more of the ozone’s oxygen atoms becoming attached to the carbon chain, to create new chemical species. In principle, this should result in a gradual loss of unsaturated triglycerides and a concomitant rise in the reaction products of ozonolysis. And that, in practice, is what Dr Hinners and Dr Lee found.

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Source: Slashdot – Fingerprints Can Now Be Dated To Within a Day of When They Were Made

Iwastheone shares a report from The Atlantic, written by Sidney Fussell: Uber has banned guns in cars, for both drivers and passengers, since 2015. But over email and Facebook Messenger, four current and four former drivers told me they carry firearms on the job. In explaining why, they each cited the same self-determinalist rhetoric Uber has slapped on subway ads to entice drivers and used in hearings to justify the business model: Drivers maintain good ratings, own their own cars, set their own hours, act as their own bosses, and follow local laws. But ultimately, they work for themselves, and Uber is, to use a Silicon Valley term of art, just a platform.

In 2017, Jose Mejia, a Miami driver, filed a federal class-action suit against Uber to reverse its firearm ban. Florida’s 2008 “bring your gun to work” law empowers employees to store legal firearms in personal lockers or their own cars. With Uber, of course, the car is the workplace. Mejia claimed that Uber policy violated Florida law and, citing an incident in which an Uber driver with a concealed-carry license shot and disarmed a Chicago gunman, argued that arming Uber drivers could save lives. But Mejia couldn’t prove that Uber violated his rights: He hadn’t been fired or threatened with suspension. The company had announced a ban, yes, but never materially stopped him from carrying a firearm. The Florida court dismissed the suit (PDF) without prejudice in 2018. Here we have a uniquely American absurdity: Drivers can carry guns to work, to a bar, to a supermarket, but not in their own cars while using the app to transport passengers. Like Mejia, they exist in this space between name and effect, adherent to a ban with little practical enforcement.

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Source: Slashdot – Uber Officially Bans Drivers From Carrying Firearms, But Company’s Business Model Prevents Enforcement

California Attorney General Xavier Becerra sent a letter to the Internet Corporation for Assigned Names and Numbers (ICANN) demanding more information about the private equity takeover of the .org domain registry. The attorney general is seeking answers to 35 questions concerning the sale as well as documents sent between ICANN, private equity firm Ethos Capital, and Public Interest Registry (PIR), which manages the .org domain. Mashable reports: Ethos Capital disclosed last year that it was acquiring PIR from its non-profit parent organization, the Internet Society, for $1.135 billion. ICANN, the non-profit organization that oversees domain names, disclosed the letter on its website along with its own correspondence with PIR, informing it of the development. Previously, ICANN had until Feb. 17 to approve or deny the sale. According to ICANN, as a result of the California AG’s letter, it’s seeking to delay this deadline until April 20.

ICANN says it’s “fully cooperating” with the request. In its letter to PIR, ICANN gives a heads up that it will be providing the attorney general “confidential material” to comply with the AG’s demands. As ICANN’s letter states, it has terms in its contract with PIR which forbid the organization from disclosing information that the registry deems confidential unless required by law. ICANN clearly views the AG’s letter as applicable.

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Source: Slashdot – Sale of<nobr> <wbr></nobr>.Org Domain Registry Delayed By California Attorney General

“The UK has officially left the European Union after 47 years of membership,” reports the BBC.

The historic moment, which happened at 23:00 GMT, was marked by both celebrations and anti-Brexit protests. Candlelit vigils were held in Scotland, which voted to stay in the EU, while Brexiteers partied in London’s Parliament Square… Brexit parties were held in pubs and social clubs across the UK as the country counted down to its official departure.

Hundreds gathered in Parliament Square to celebrate Brexit, singing patriotic songs and cheering speeches from leading Brexiteers, including Nigel Farage… In Northern Ireland, the campaign group Border Communities Against Brexit staged a series of protests in Armagh, near to the border with the Republic of Ireland.

At 2300 GMT, Scotland’s First Minister Nicola Sturgeon tweeted a picture of the EU flag, adding: “Scotland will return to the heart of Europe as an independent country.”
The U.K. flag was removed from European Union institutions in Brussels, the BBC notes. And they also quote U.K. Prime Minister Boris Johnson as saying “For all its strengths and for all its admirable qualities, the EU has evolved over 50 years in a direction that no longer suits this country.”

“The most important thing to say tonight is that this is not an end but a beginning…”

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Source: Slashdot – Brexit Happens

An anonymous reader quotes a report from TechCrunch: A social media boosting startup, which bills itself as a service to increase a user’s Instagram followers, has exposed thousands of Instagram account passwords. The company, Social Captain, says it helps thousands of users to grow their Instagram follower counts by connecting their accounts to its platform. Users are asked to enter their Instagram username and password into the platform to get started. But TechCrunch learned this week Social Captain was storing the passwords of linked Instagram accounts in unencrypted plaintext. Any user who viewed the web page source code on their Social Captain profile page could see their Instagram username and password in plain sight, so long as they had connected their account to the platform.

Making matters worse, a website bug allowed anyone access to any Social Captain user’s profile without having to log in — simply plugging in a user’s unique account ID into the company’s web address would grant access to their Social Captain account — and their Instagram login credentials. Because the user account IDs were for the most part sequential, it was possible to access any user’s account and view their Instagram password and other account information with relative ease. The security researcher who reported the vulnerability provided a spreadsheet of about 10,000 scraped user accounts to TechCrunch.

“The spreadsheet contained about 4,700 complete sets of Instagram usernames and passwords,” the report says. “The rest of the records contained just the user’s name and their email address.”

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Source: Slashdot – Social Media Boosting Service Exposed Thousands of Instagram Passwords