Don’t you sometimes worry that we use the Internet and don’t actually understand how it works? Well, let’s dive into the wonderful world of key exchanges, and which are the core of every TLS connection that we make to the Web. ECDH (Elliptic Curve Diffie Hellman) For key exchange, we started with the wonderful Diffie-Hellman…

In a brilliant paper published at USENIX 2022, Sullivan et al [1] show that real-life RSA signatures can be cracked for their private key — if the signature contains a fault. In a previous article, I outlined how faults in ECDSA can cause compromises: https://medium.com/asecuritysite-when-bob-met-alice/ecdsa-signatures-can-be-cracked-with-one-good-signature-and-one-bad-one-2d8bc71949e9?sk=b2d77913f1420d2a72952c1f2395d379

Well, yes, but with a small modification … — Homomorphic encryption provides us with a way to encrypt values and then to be able to process them. Let’s say we have Bob the Data Processor and Alice the Consumer. With this, Alice could encrypt the values that she has with her public key, and then Bob can process these…

We live in a 20th Century world of data, and where often do not protect our data. In a future data world, all of our values could be encrypted, and where we can still operate on them. This will be a world of homomorphic encryption. Meet Taher Elgamal Taher Elgamal is one of…