Space can be secured by assigning a role to a specific user (or group) on that space.
Role refers to a set of permissions that can be applied to a folder.
Permissions are identified by a string. A particular permission, for example
ReadChildren, may be granted or denied to an authority; a user, group, administrator, owner, and so on. The children of a node will inherit permissions from their parents. So by default, the files in a folder will inherit their permissions from the folder. Permissions set on a node take precedence over permissions set on the parent nodes. The inheritance of permissions may be turned off for any node. A permission group is a convenient grouping of permissions such as
Read made up of