ebook
Le saviez vous ?
Lisez votre e-book sur ordinateur, tablette et mobile grâce aux applications :
Coups de cœur Cultura
Tous les passeurs de culture peuvent partager leurs découvertes !
Tu as aimé ce produit ? Partage dès maintenant ton coup de coeur :
You used cryptography fifty times before breakfast.
You unlocked your phone with your face. Paid for coffee with a tap. Sent a message that promised it was "end-to-end encrypted." Every one of those moments ran on cryptography — the technology that protects your digital life, and the technology most people understand the least.
In Who Holds the Key? , technologist Wasim Ahmad explains, in plain English, the simple ideas behind the locks your life runs on. Through true stories and real-world examples — including the $1.5 billion theft where nobody stole the keys: the screen lied — he shows how encryption, digital signatures, passkeys, secure hardware, and cryptographic keys work, and why understanding them has become an essential life skill.
Built on four plain ideas and one master question — the one on the cover — the book runs from WhatsApp and Apple Pay to Bitcoin, AI, and quantum computing. No math. No jargon. No paranoia.
You don't need to become a cryptographer. But by the time you finish this book, you'll think like one.
Can WhatsApp really not read my messages?
Where does my Face ID data go — and is it safe?
Isn't keeping every password in one app insane?
What am I agreeing to when my wallet says "Sign"?
Will quantum computers break everything?
What happens to my crypto and photos when I die?
