What Is a %u201CBlockchain%u201D?. Come listen, children, and you shall hear, of blockchain tech, oh, my dear. Why, do you ask, do you need to know the basics of what a blockchain is, and why it is important? Well, grasshopper, because the future of computer security and your law practice, or your business, or your profession, depends upon it. Data security is the challenge of our generation; and, if we don't get it right, future societies dependent on technology will be vulnerable to evil persons bent on our destruction. Is the survival of our planet enough reason for you? Okay, let's assume you want our society to survive. In our world, data runs the place. Our banking relationships, our money, our people connections, our very lives, depend upon the security of our personal information and our data. If the infrastructure isn't secure, we are one hack away from the return of the Stone Age. Computer encryption of data is necessary; but, public access to important data is also necessary. A blockchain is a chain of millions of "blocks" of data that are encrypted beyond the ability of any person or entity to crack. Once each block is encrypted, anyone can see the previous blocks; but, they can no longer be changed, ever. The only thing that can be altered is the current block at the end of the chain. Thus, once created, a block chain is secure forever, and the data in it is secure. Like all computer things, it is much more complicated, and this article will help you understand better. But, you better believe that you need to know about blockchains. Your future depends on it. Encrypt on.