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 ...

GnuPG, or GPG, is a free implementation of the OpenPGP standard. It allows you to encrypt and sign your data and communications. It features a versatile key management system and access modules for ...

The key used for these kinds of symmetric encryption is called as File Encryption Key (or FEK). This FEK is in return encrypted with a public or a private key algorithm like RSA and stored with the ...

I’ve been involved with multiple projects with file encryption lately, and even though I’ve been assisting with data encryption projects for years, I’m still learning something new every day. They say ...

Signing and encryption have almost become a day to day task of some users. While encryption makes your file unreadable to unauthorized users, signing helps you in claiming and verifying the integrity ...

Last year, in between writing Take Control books and Macworld articles, I managed to squeeze in another little project – writing the 900-page “Mac Security Bible,” published in January 2010 by Wiley.

Times have changed, and more than a few tools have come and gone that were designed to encrypt your data and keep it safe from prying eyes or data thieves. It's time for a fresh look. Which ...

Curious about the security of your documents in the cloud? You’re not alone. We recently received an email from Dana in Marietta, Ga., who is asking this, "I just read your article on saving documents ...

I'm looking to encrypt a file with OpenSSL functions (blowfish, des, rc4-- haven't picked one yet). Anyhow, after decrypting a file, I need to know if the file was correctly decrypted. The only way it ...