Archives par mot-clé : Hervé Debar

Cryptography: what are the random numbers for?

cryptographie, nombres aléatoires, random numbers

Hervé Debar, Télécom SudParis – Institut Mines-Télécom and Olivier Levillain, Télécom SudParis – Institut Mines-Télécom The original purpose of cryptography is to allow two parties (traditionally referred to as Alice and Bob) to exchange messages without another party (traditionally known as Eve) being able to read them. Alice and Bob …

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Governments, banks, and hospitals: all victims of cyber-attacks

cybersécurité, attaques informatiques, attacks

Hervé Debar, Télécom SudParis – Institut Mines-Télécom Cyber-attacks are not a new phenomenon. The first computer worm distributed via the Internet, known as the “Morris worm” after its creator, infected 10% of the 60,000 computers connected to the Internet at the time. Published back in 1989, the novel The Cuckoo’s …

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Zero-click attacks: spying in the smartphone era

zero-click attacks

Zero-click attacks exploit security breaches in smartphones in order to hack into a target’s device without the target having to do anything. They are now a threat to everyone, from governments to medium-sized companies. “Zero-click attacks are not a new phenomenon”, says Hervé Debar, a researcher in cybersecurity at Télécom …

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Facebook: a small update causes major disruption

Facebook

Hervé Debar, Télécom SudParis – Institut Mines-Télécom Late on October 4, many users of Facebook, Instagram and WhatsApp were unable to access their accounts. All of these platforms belong to the company Facebook and were all affected by the same type of error: an accidental and erroneous update to the …

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