Note: this is not the same as What is a self-contained cross-platform encryption for USB drive?. I believe my question is on topic because I'm not asking for a recommendation. I'm asking if such a product exists. I'm not asking for a subjective comparison of products. A correct answer could be as short as "yes" or "no" with a link to corroborate.
Here's the use case I'm considering:
- The user has multiple, heterogenous computers. (Linux, Mac OS, and Windows)
- The user shares a volume of files between said computers. (The method of sharing is unspecified. Could be Dropbox or USB drive or … anything.)
- The volume can be sliced to support large volumes on host file systems with file size constraints. (E.g. a 10GB volume can be stored as 5 X 2GB files on a FAT file system.)
- The user enters a passphrase once to unlock the volume and see file metadata. (Not required to type a passphrase for each individual file.)
- Uses authenticated encryption.
Notice that the last criterion eliminates TrueCrypt as a possible answer.