Mis en avant

Mon premier article de blog

« Soyez vous-même, les autres sont déjà pris. »

— Oscar Wilde.

Cet article est le tout premier que je publie sur mon nouveau blog. Je viens juste de lui donner vie, restez à l’affût pour la suite. Abonnez-vous ci-après pour rester informé des mises à jour.

Le tableau le plus cher du monde a-t-il bien été peint par Léonard de Vinci ?

Le "Salvator Mundi" ("le sauveur du monde", en latin) lors de sa présentation chez Christie's à New York, le 22 octobre 2017.
Le « Salvator Mundi » (« le sauveur du monde », en latin) lors de sa présentation chez Christie’s à New York, le 22 octobre 2017. © Tolga Akmen, AFP

Un documentaire diffusé mardi affirme que le « Salvator Mundi », acheté en toute discrétion plus de 380 millions d’euros par le prince héritier d’Arabie saoudite en 2017, ne serait pas entièrement de la main du maître de la Renaissance. Cependant, plusieurs enquêtes parues ces derniers jours dans les médias soutiennent l’inverse sans évacuer toutes les zones d’ombres qui entourent cette rocambolesque affaire.

Suite 👉👉https://amp.france24.com/fr/culture/20210413-le-tableau-le-plus-cher-du-monde-a-t-il-bien-%C3%A9t%C3%A9-peint-par-l%C3%A9onard-de-vinci

WhatsApp: A new scam can steal your account

Be careful for WhatsApp messaging users, a scam can deprive you of access to your own account. For the moment, these attempted thefts have been observed mainly among English-speaking users.

How do hackers work? When a user creates their account or installs the application on their phone, they receive a message from WhatsApp giving them a 6-digit code to activate the application. But it also works when users want to “recover” their account.


Fake message

Immediately afterwards, he receives another message from a loved one who alerts: “Sorry, I mistakenly sent you my 6-digit security code. Can you transfer it to me please. It’s urgent ! « .

Except that it was the hackers who hacked your loved one’s account to send this message. If you send him the code, the scammer will be able to install WhatsApp with your number on his own phone. You will no longer have access to your account.

To prevent this account theft, WhatsApp offers to activate two-step verification, which helps strengthen security.

Prince Philip, Husband of Queen Elizabeth II, Is Dead at 99

Prince Philip, the Duke of Edinburgh, husband of Queen Elizabeth II, father of Prince Charles and patriarch of a turbulent royal family that he sought to ensure would not be Britain’s last, died on Friday at Windsor Castle in England. He was 99.

« Prince Philip, Husband of Queen Elizabeth II, Is Dead at 99 – https://www.nytimes.com/2021/04/09/obituaries/prince-philip-dead.html

Why Signal’s latest idea might backfire


Is the Signal instant messaging app putting its finger in a gear that may overtake it? This is the opinion of some observers, specialists in computer security, after having read the latest initiative of the service , which is still at an experimental stage. Indeed, in the United Kingdom alone, Signal is exploring a payment service called Signal Payments.

“  We want payments in Signal to be fast, private and work well on mobile devices,  ” IM said in an April 6 blog post. And to begin with, the application continues, it is on MobileCoin that it bets. It is a cryptocurrency which, as the name suggests, is thought to be used like digital money on the smartphone.

According to the presentation, MobileCoin includes near instant transactions, in less than ten seconds. It also offers features to easily restore its currencies (MobileCoin currency is called MOB), including in the event of loss of the mobile. Finally, it claims to be eco-responsible: it claims to be much more economical in electricity than other cryptocurrencies, which require energy to operate .

But the specificity that concerns today is its level of confidentiality.

MobileCoin is pleased that  »  the whole ledger [which allows to keep a trace and to follow the transactions with MOB, note] is opaque, the individual transactions are protected by cryptography and the network uses the persistent confidentiality  « . This process prevents the confidentiality of past exchanges from being questioned, even if its cryptography would be compromised.

However, it is precisely the high degree of anonymity that alarms, because in the eyes of some commentators, this could backfire not only against Signal, but also against end-to-end encryption in general. This is what Bruce Schneier, a specialist in computer security and cryptography, argues, in a blog post that was published on April 7. He especially fears the reaction of the authorities.

An unfavorable development for encryption?

“  I think that’s a terribly bad idea. […] The addition of a cryptocurrency to an end-to-end encrypted application blurs the morality of the product, and invites all kinds of government investigations and regulatory interference  , ”anticipates Bruce Schneier. He cites haphazardly the FBI, the tax services, the stock market regulator or even anti-money laundering agencies.null

“  I don’t see any good reason to do this. Secure communications and transactions can be separate applications, or even separate applications within the same organization. End-to-end encryption is already at risk. Signal is the best app we have. Combining it with a cryptocurrency means that the whole system dies if one part dies  ”.

Bruce Schneier’s fears over end-to-end encryption are not a figment of the imagination. As recalled in early March the Electronic Frontier Foundation , a key organization for the defense of digital freedoms, the boss of the FBI again demanded before American parliamentarians a backdoor on end-to-end encryption services, in the name of the fight against crime and terrorism.Leading cryptographers are concerned about the measure’s effects on end-to-end encryption. // Source: Facebook

The request from the current FBI boss is not new: Similar calls were made in 2017 , 2018 and 2020 , to take just a few examples. And this is not a debate specific to the United States: it also exists in France, as evidenced by the regular comments of the former public prosecutor François Molins, certain parliamentary initiatives and the reflections at the level of the government , or in Europe. .

Supporters of end-to-end encryption are already struggling to resist the assaults of those who wish to reduce it, to legitimately fight against crime, child pornography, terrorism and trafficking of all kinds. The arrival of payments will give another pretext to regulate these messaging services, in the name of the fight against mafia financing and money laundering.

In summary, this is Bruce Schneier’s analysis. And he’s not the only one to think so. In Wired , Matthew Green cryptography professor said equally concerned  »  signal as encrypted messaging product is really valuable. […] It terrifies me to see them mix up their history with the legislative and regulatory hell of cryptocurrencies and the vulnerabilities that go with it.  « 

Chance of the calendar, a decree appeared in the French Official Journal on April 4 on a similar theme. It focuses on the fight against the anonymity of virtual assets and anonymous electronic currencies. It provides for a tightening up of the national system for combating money laundering and the financing of terrorism. This decree updates a number of legislative provisions.

Thus, the text “  clarifies the ban on the use of anonymous electronic money for the purchase of digital assets. It also imposes on providers of digital asset services an obligation to identify their customers prior to any occasional transaction  ”. In addition, “  it determines the procedures for verifying the identity of customers […] when entering into a business relationship.  « 

A risk for the moment limited?

Obviously, these issues did not deter Signal from moving in this direction. In any case, the announcement note does not mention it. The mobile app just welcomes explaining that it does not have access to the balance, full transaction history or funds, and that these funds can be transferred at any time to another service or app. .

One thing is certain: the choice of MobileCoin probably owes nothing to chance. Beyond its technical peculiarities, it turns out that the American behind Signal , Moxie Marlinspike – a pseudonym – has served as a technical advisor since the creation of MobileCoin in 2017, and that he was paid for it. He contributed to the technical design of cryptocurrency. However, he assures that he does not have any.Moxie Marlinspike, creator of Signal. // Source: John S. and James L. Knight Foundation

MobileCoin is based on Stellar blockchain technology. This is not based on proof of work – that is, computer calculations to be made – but on a particular type of consensus . This orientation explains why transactions are carried out more quickly, without a heavy energy footprint, by avoiding calling on all the nodes of the network to validate the exchanges, but only a part, some of whom are trusted.

Currently, MobileCoin has been trading on the FTX marketplace since December 2020. The peculiarity of FTX is that it does not allow transactions from US users, which can keep US regulators at bay. But Signal suggests a possible deployment in other marketplaces. And at Wired, a project member suggests arriving in the United States. But it might, in the meantime, frown some eyebrows in others. For example, in the UK, where testing is starting.


Mark Zuckerberg uses Signal

One of the Signal users is Mark Zuckerberg, CEO and founder of Facebook. The billionaire’s phone number was indeed discovered in a huge data breach at Facebook. After entering the number into the Signal app, a computer security expert realized that Zuckerberg was well listed among rival messaging users of WhatsApp and Messenger. 

A few days ago, Alon Gal, head of cybercrime intelligence firm Hudson Rock, discovered a database containing confidential information on 533 million Facebook users . This data was recovered during a hack into the social network. 

This database includes in particular the Facebook identifier, the full name, the date of birth, sometimes the e-mail address, the gender, the date of creation of the account, the place of residence or the telephone number. Among these hacked numbers is the phone number of Mark Zuckerberg , CEO and creator of Facebook.

Mark Zuckerberg is on Signal, the messenger that overshadows WhatsApp and Messenger

Zuckerberg’s phone number was spotted by computer security researcher Dave Walker. On his Twitter account, the expert explains that he discovered the phone number while browsing the database, which appeared on several hacking forums. Other leaked data, including the anniversary date, confirms that it is indeed the founder of Facebook and not a namesake.

Out of curiosity, Dave Walker entered the phone number into the Signal messaging app, a competitor app to WhatsApp and Facebook Messenger. Zuckerberg’s number is well linked to a Signal account. “Mark Zuckerberg also respects his own privacy by using a chat app that has end-to-end encryption and doesn’t belong to Facebook,” laughs Dave Walker.

This discovery is all the more funny since Signal is one of the direct competitors of Facebook Messenger and WhatsApp . Users scalded by Facebook’s privacy practices are turning overwhelmingly to Signal , a messenger that boasts of not collecting user data. Advised by Edward Snowden, the messaging service simply retrieves the telephone number of its users.

If this leak proves that Mark Zuckerberg does have an account on Signal, there is no indication that he is actively using messaging. We imagine that the computer scientist could have installed Signal in order to take a look at the competition.

Why is this bitcoin billionaire accumulating so many ethers (ETH)?

Ethereum, the ideal monetary candidate – For Mark Cuban, it is neither cryptography nor Bitcoin, nor even the blockchain that will revolutionize our lives, but smart contracts. During his visit to “The Delphi Podcast”, the successful investor made a comparison between the emergence of smart contracts and that of the internet.

Ethereum: the most similar to a currency

Mark Cuban has long been seen as a Bitcoin detractor . He had said in September 2019 that he preferred to use bananas rather than bitcoins as currency. However, it in no way denies its usefulness as a store of value . The billionaire even considers it much more efficient than gold in this role. But anyway, in his eyes, the technical characteristics of Bitcoin do not allow it to fulfill the office of a currency.

If he asserts that ether (ETH) is the closest digital asset to a currency , it is because he considers that a currency must retain some form of flexibility , allowing it to adapt. in a changing environment. To support this thesis, Cuban relies on the upcoming implementation of EIP-1559 , which should improve the scalability of the Ethereum network, where Bitcoin is still extremely rigid .

Still according to Cuban, if we put the history of digital assets and that of the Internet into perspective, we are only at the proof of concept stage. In fact, there are a tiny number of projects that present real consumer use cases . As in the early days of the internet, it was necessary to perform multiple operations across multiple platforms and applications before achieving the desired result . The typical example is DeFi , which has enormous potential , but which is particularly difficult to access for the general public.

However, the owner of the Dallas Mavericks is firmly convinced that the situation will improve over time . With the advent of the internet, the price of bandwidth gradually fell, which allowed new use cases, including the arrival of high definition video. But these developments did not happen overnight. It took ten years or so before the internet became a truly mainstream tool.

Despite his love for Ethereum, Mark Cuban only has 30% ethers in his wallet, which additionally contains 60% bitcoin and 10% assets devoted to other projects. The businessman specifies that he no longer practices trading and that he considers his ethers and bitcoins as long-term investments

WhatsApp will offer customization options for its interface in the hope of keeping its users

WhatsApp is indeed testing a new feature allowing users to customize the colors of the application

The application has lost a large number of users due to its new policy of sharing personal data

A few weeks ago, WhatsApp saw its user numbers skyrocket following its announcement to share certain personal data with Facebook , creating an exodus of its users to Signal . Since then, the messaging application has multiplied its attempts to reconnect with its users via information campaigns or new features and it seems that this continues. According to WABetaInfo , WhatsApp is indeed testing a new feature allowing users to customize the colors of the application.

It is in particular a question of modifying the color of the text, but also of certain icons. Nothing revolutionary, but this aesthetic change shows that Facebook – parent company of WhatsApp – wants to offer more customization options to its users. One way to make the app more user-friendly and to involve members more.

European users protected by the GDPR

Will Facebook manage to make people forget the bad press that WhatsApp has been suffering from for a few weeks with such a feature? Hard to say. From May 15, WhatsApp users will still be forced to accept the new policy of sharing certain personal information between the messaging app and Facebook, at the risk of no longer being able to use all of WhatsApp’s features. .

Remember that the change in WhatsApp data usage policy is less important in Europe. The GDPR protects user data and prevents its commercial reuse. WhatsApp will therefore not be able to share « European user data with Facebook in order to improve the group’s advertisements or commercial products, » a spokesperson for Facebook France said.

The future American president will travel faster than sound.

The start-up Exodus, which signed a contract with the US Air Force, could equip the presidency with a flamboyant supersonic plane in the 2030s.

The future American president will travel faster than sound. At Mach 1.8 precisely, or 2222 km / h. The US Air Force signed contracts last September with start-ups to develop supersonic transport planes for the US federal administration.Among them, the Californian start-up Exosonic which is one of those who will perhaps have the honor of flying the future American president. 

The concept of the supersonic jet impressed and received the front of the Presidential and Executive Airlift Directorate which is in charge of the presidential fleet known as « Air Force One » (the term in fact refers to all the planes in which are the president).Since 1990, this presidential fleet has consisted of two refitted Boeing 747-200B aircraft. But by 2024, two new models (the most recent 747-8) are expected to come into operation. Perhaps these will be the last subsonic models in the fleet.

Because by 2030, the first supersonics could come into operation. CNN thus unveils the model of the start-up Exodus, which could transport the future president or vice-president of the United States in 10 years.

Supersonics without boom

It’s a rather small 31-passenger model that’s a derivative of the 70-seat commercial airliner developed by the start-up. It would be a « low-boom » supersonic, an aircraft in which travelers « fly at supersonic speeds without generating disturbing booms for those on the ground, » said a spokesperson for the Army Materiel Command. ‘air at Military.com .

« With this concept, we plan to implement new technologies that are not available today or that you do not see (yet) on commercial or business aircraft », explains to CNN Stephanie Chahan, in charge of interior design at Exosonic.

Courtesy Exosonic/CNN © Exosonic

The start-up thus offered CNN a virtual tour of the interior of the project which will be presented to the US Air Force.The main cabin has 20 business class seats and two galleys.
« The design of the cabin was inspired by the colors of the American executive power, its mission and its values, as well as by the peregrine falcon, known for its speed and both for its movement and for its beauty, » explains the designer. .

Courtesy Exosonic/CNN © Exosonic

The aircraft would also have two private suites including meeting rooms, secure videoconferencing room with rotating leather armchairs and light wood frame.

Courtesy Exosonic/CNN © Exosonic

According to its designer, the device would have a range of 5,000 nautical miles, or more than 9,200 km. Using noise attenuation technologies, it could fly over populated land at speeds greater than Mach 1.Other even more ambitious projects have received an investment from the US Air Force. like that of Hermeus Corporation based in Atlanta which is developing a hypersonic model (Mach 5) that would allow the American president to reach Europe in just 90 minutes. The start-up has already developed its engine, which it has successfully tested.

Source BFM

A Child Takes Nuclear Weapons Command Twitter

A mysterious encrypted message appeared on the US Army Strategic Command’s Twitter account on Sunday, March 28. Conspiracy, nuclear code exposed or hacking? None of this in reality.

« ; l ;; gmlxzssaw, » Here is the mysterious message that Internet users could read on the official Twitter account of the command in charge of the military control of the entire American nuclear arsenal, Sunday, March 28. The tweet was subsequently deleted. Is this a nuclear code, a Pentagon hack or a conspiracy ? None of this in reality. 

Crypto enthusiasts will be disappointed when they learn the true origin of this cryptic message. It is indeed a simple gibberish, written by a child who seized the Twitter account of the army for a few minutes, the Stratcom told a reporter for the American media Daily Dot.  

“The head of  the Military Command Twitter account  , who was telecommuting, left the account open and unattended for a few moments. Her young child took advantage of the situation and started playing with the keyboard and, unfortunately, and without realizing it, published the tweet, « detailed a spokesperson for Stratcom in a statement.  
« Absolutely nothing bad happened, that is to say no hacking of our Twitter account, » he added. 

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