WhatsApp has closed the loophole that allowed users to check whether someone had blocked them through the app’s ...

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There are several methods to check whether you're blocked on WhatsApp, but they are either not fully reliable or require you to message the contact. A ...

Abstract: Due to the increasing threats from possible large-scale quantum computers, post-quantum cryptography (PQC) has drawn significant attention from various communities recently. In particular, ...

Here's the best free VPN for PC 2026 comparison. Get the best free VPN for Windows 11 for privacy, fast speeds, and online ...

Google has brought end-to-end encrypted Gmail to Android and iOS for eligible Workspace users, extending secure mobile email without extra apps. Gmail is finally bringing end-to-end encryption to ...

Single-cell RNA sequencing inadequately predicts protein abundance, particularly for intracellular cytokines. We developed CIPHER-seq (Cytokine Intracellular Protein High-throughput Expression with ...

This week I audited three enterprise systems. All three claimed "AES-256 encryption for data at rest." All three were broken. Two used ECB mode (preserves patterns—completely broken for anything but ...

Learn how to implement a classic substitution cipher in C! This step-by-step tutorial walks you through encoding and decoding messages by replacing each letter with another according to a fixed key. A ...

Some books are mathematically rigorous (e.g. Foundations of Cryptography, Modern Cryptography, Probabilistic Proofs and Pseudorandomness), others more applied (e.g. Applied Cryptography, Serious ...