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8.3   How can I encrypt my files?

EagleFiler supports encryption at the library level. You can have multiple libraries, each of which is either encrypted or not encrypted. An encrypted library works just like a normal library except that all aspects of it (the files, notes, metadata, search indexes, and temporary files) are unreadable until the proper passphrase has been entered. Each encrypted library can have a different passphrase.

When creating a New Library…, the Encrypt library using passphrase option lets you store the library on an encrypted disk image. The entire library (including all the files, notes, and indexes) will be stored in a disk image file that is encrypted using AES-128 or AES-256.

You can choose the format and encryption level of the disk image:

Sparse Disk Image
Creates a .sparseimage file that’s compatible with Mac OS X 10.4 and later.
Sparse Bundle Disk Image
Creates a .sparsebundle package that requires Mac OS X 10.5 or later, but which is much more efficient for backups. Note: Mac OS X does not support sparse bundle disk images on certain volume types, so in those cases you would need to use a sparse disk image even if you have a recent version of Mac OS X.
128-bit AES Encryption
Compatible with Mac OS X 10.4 or later.
256-bit AES Encryption
Requires Mac OS X 10.5 or later. It is slower but even more secure than AES-128.

Maximum Library Size

An encrypted library will only consume the amount of disk space needed to hold its files, indexes, and temporary files. However, you must set a maximum library size that controls how large the library can grow. The larger the maximum size, the more overhead there is for encryption. For example, a library with a 1 GB maximum size will have about 26 MB of overhead, while a library with 500 GB maximum size will have about 111 MB of overhead.

If your library reaches the maximum size, you can create a new, larger library and copy all of the files to it by following the instructions in the How can I rebuild a library? section.

Opening an Encrypted Library

To access the library, double-click the disk image file and enter the library’s passphrase. The library will appear as a white icon on your desktop, and you can double-click the .eflibrary file to open it in EagleFiler. (You can also access all the files in the library directly from the Finder.) When you’re done with the library, close it in EagleFiler and eject the library from your desktop to lock it again. Now it can only be accessed by people who know the passphrase. For more information, please see the Open Library… section.

When you’re done using an encrypted library, choose Close & Lock from the File menu.

Changing the Passphrase

To change the passphrase of an encrypted library, eject the library, then open Disk Utility. Drag the library’s disk image file into Disk Utility’s device list, at the left of the window. Select the disk image in the list and choose Images ‣ Change Password.

Compacting an Encrypted Library

If you’ve removed files from an encrypted library, you can reclaim space on your hard disk by using DropDMG’s Compact Image… command to on the .sparseimage or .sparsebundle file.

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