Sometimes when mounting a sshfs filesystem OS X will not read a file incorrectly stating that it is damaged.
Solution:
xattr -r -d com.apple.quarantine /path/to/encfs/mount/point
Or a less safe option:
System Preference -> Security & Privacy -> Allow Apps downloaded from: Anywhere
Source:
http://apple.stackexchange.com/questions/129966/files-wrongly-considered-as-damaged-in-encfs-volume
