Putting sensitive data in email messages or cloud storage should give you the heebie-jeebies, but a good dose of cryptography can give you peace of mind. Pretty Good ...

Opendime is a tiny USB flash drive that can be loaded with bitcoin by the first user and given to another user, who is, in turn, able to pass it along to a third user and so forth. The private key ...

As a Bitcoiner, you’re going to need a secure way to communicate privately, without relying on a company to encrypt your data for you. For example, freely available methods with end-to-end encryption ...

Editor's Note: The following is an excerpt from chapter 11, "Keeping Your Data Private", of Peter van der Linden's Guide to Linux, published August 2005 by Prentice Hall, ISBN 0-13-187284-2. In Part 1 ...