What is an e4a file and how do I open an e4a file?

A file with the .e4a extension is an Encrypt4all archive file, and these files are implemented with compression and encoding specifications used in the E4A format. These Encrypt4all archive files are stored in the E4A format when a user selects and compresses a file, folder or a group of files and folders with the Encrypt4all software. This application and the E4A compression format were developed by Encrypt4all to provide users with a quick and easy way to compress their files and folders stored in their computers running on Microsoft Windows-based systems. An E4A file can also be integrated with encryption functionalities using the Encrypt4all software. This is where a user of the Encrypt4all software selects a file, a folder or a group of files and folders, compresses them to one E4A file, then accesses the password protection features available in the Encrypt4all software. When an E4A file is encrypted and secured by a password, only users with the correct password will be able to open and access the content of the E4A file.