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Strategic insights on blockchain, AI, security, leadership, and career in an age of disruption.

AI Voice Phishing: Why Your Defenses Face the Wrong Direction
September 04, 2026·7 min read
AI

AI Voice Phishing: Why Your Defenses Face the Wrong Direction

AI voice-cloning has fundamentally reversed phishing attacks—now criminals call employees impersonating trusted leaders, exploiting help desk processes instead of technical vulnerabilities.

Recent Essays

#blockchain security

118 posts

Hashing: The Unsung Hero of Blockchain Data Integrity
May 11, 2024Opinion

Hashing: The Unsung Hero of Blockchain Data Integrity

Hey there, blockchain enthusiasts! In my last post, we took a deep dive into the world of hashing algorithms, exploring the ins and outs of SHA-256 and its alternatives. Today, I want to build on t...

Hashing Algorithms: SHA-256 and Beyond
May 10, 2024

Hashing Algorithms: SHA-256 and Beyond

Welcome back, blockchain enthusiasts! � In our last post, we explored the concept of hashing, the digital fingerprint that secures blockchain networks. Today, we'll dive deeper into the most widely...

Unlocking the Secrets of Hashing: Blockchain's Digital Fingerprint
May 09, 2024

Unlocking the Secrets of Hashing: Blockchain's Digital Fingerprint

Are you ready to dive into one of the most fascinating aspects of blockchain technology? Today, we're going to explore the concept of hashing—the digital fingerprint that ensures the security and i...

Unlocking the Power of Public-Key Cryptography in Blockchain
May 07, 2024

Unlocking the Power of Public-Key Cryptography in Blockchain

In our previous post, we explored the fascinating world of cryptography in blockchain. Today, we're going deeper into a specific type of cryptography that forms the backbone of blockchain security:...

Unraveling the Secrets of Cryptography in Blockchain
May 06, 2024

Unraveling the Secrets of Cryptography in Blockchain

In our previous post, we delved into the world of decentralization, the heart of blockchain technology. Today, we're going to explore another critical aspect that underpins the security and functio...

Cryptography in Blockchain: The Art of Secure Communication | Enterprise Security Guide
May 06, 2024Opinion

Cryptography in Blockchain: The Art of Secure Communication | Enterprise Security Guide

Master cryptography in blockchain technology - comprehensive guide to public-key cryptography, digital signatures, hash functions, and security protocols for enterprise blockchain implementations.

Blockchain: The Trust Machine | Complete Guide to Decentralized Ledger Technology
May 01, 2024

Blockchain: The Trust Machine | Complete Guide to Decentralized Ledger Technology

Understand blockchain as the trust machine - a comprehensive guide to decentralized ledger technology that eliminates intermediaries and builds trust through cryptographic proof and distributed consensus.

Composability and Diversity
October 17, 2022Opinion

Composability and Diversity

Common thoughts from 1989 and 2022

BUILD YOUR BLOCKCHAIN KNOWLEDGE IN 4 MINUTES PER WEEK.
September 22, 2022

BUILD YOUR BLOCKCHAIN KNOWLEDGE IN 4 MINUTES PER WEEK.

Join 6k+ subscribers to Blockchain Notes. Every Saturday morning, you'll get 1 piece of knowledge on blockchain that will accelerate your career and business.

When NFTs can get troublesome
August 01, 2020

When NFTs can get troublesome

Explore the complex world of NFTs with Rug Radio's innovative model, blending art, membership, and potential investments. Discover how NFTs extend beyond digital collectibles.

Blog — Blockchain, AI & Leadership Strategy | Jay Schulman