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 ...

One of the oldest still-working protocols on the Internet is FTP (File Transfer Protocol). Designed in the net’s earliest days, FTP never concerned itself with security. Later standards addressed this ...

Windows 10 is becoming a useful Unix/Linux sysadmin platform. First, it has incorporated Windows Subsystem for Linux in the Windows 10 Fall Creators Update. Now, in the Windows 10 April 2018 Update, ...

Hardware wallets are physical devices specifically designed to store private keys securely offline. Examples include Ledger Nano S, Ledger Nano X and Trezor. These devices are immune to online attacks ...

Using a set of public/private keys to allow you to log into a remote Linux system or run commands using ssh without a password can be very convenient, but setup is just tad tricky. Here's how and a ...

Remember that you encrypt a message using a specific public key. Only the one person with the private key that corresponds to that public key can decrypt that message. The encrypted message is all in ...