I would like to know all the users that have access to symmetric keys and the type of access they have. Can you please let me know how I can do this?
Maybe this query can help:
select u.name, p.permission_name, p.class_desc,
object_name(p.major_id) ObjectName, state_desc
from sys.database_permissions p join sys.database_principals u
on p.grantee_principal_id = u.principal_id
where class_desc = 'SYMMETRIC_KEYS'