BCArchive

I recently came across BCArchive, a software tool that excels in securely emailing a group of files. With its encrypted archive feature, BCArchive easily encrypts and compresses a group of files or folders into a secure archive. The best part about BCArchive is that it is very simple to use for even the most tech-phobic of users, and immensely secure. When creating the archive, all you have to do is specify a password, which is required to access and extract the data.

Additionally, if your recipient has a public key, you don't have to worry about passwords anymore - just choose their public key, and you are good to go. To make things even more comfortable and more convenient, BCArchive comes with a "self-extracting" file option. In this mode, the data is compressed and encrypted into a single archive file before being converted to an executable program. Following that, you or your recipient can run the program on any computer at any time, making the process of data extraction hassle-free without requiring special software.

Moreover, BCArchive is packed with a variety of security features, making it one of the most robust encryption tools around. The software utilizes both symmetric algorithms (including Rijndael (AES), Blowfish-256, Blowfish-448, IDEA, CAST5, GOST 28147-89, Triple DES) and asymmetric algorithms. Its support for public/secret key pair encryption, including RSA, ElGamal/Diffie-Hellman, is highly commendable.

All in all, BCArchive is the perfect tool for anyone looking for a secure and straightforward way to email files. Its robust security features and usability make it an excellent choice for both personal and professional use.