diff --git a/app/models/article.rb b/app/models/article.rb
index b877bd5..1f72120 100644
--- a/app/models/article.rb
+++ b/app/models/article.rb
@@ -120,6 +120,18 @@ class Article < ActiveRecord::Base
     self.find(:all, :order => 'articles.name', :conditions => [ 'articles.name like (?) or articles.name like (?)', initial + '%', initial.upcase + '%'])
   end
 
+  def display_to?(user)
+    if self.profile.public_content
+      true
+    else
+      if user.nil?
+        false
+      else
+        (user == self.profile) || user.memberships.include?(self.profile)
+      end
+    end
+  end
+
   private
 
   def sanitize_tag_list
diff --git a/test/unit/article_test.rb b/test/unit/article_test.rb
index e412877..8454f13 100644
--- a/test/unit/article_test.rb
+++ b/test/unit/article_test.rb
@@ -233,4 +233,60 @@ class ArticleTest < Test::Unit::TestCase
     assert !Article.new.folder?, 'should identify itself as non-folder'
   end
 
+  should 'always display if public content' do
+    person = create_user('testuser').person
+    assert_equal true, person.home_page.display_to?(nil)
+  end
+
+  should 'display to owner' do
+    # a person with private contents ...
+    person = create_user('testuser').person
+    person.update_attributes!(:public_content => false)
+
+    # ... can see his own articles
+    a = person.articles.create!(:name => 'test article')
+    assert_equal true, a.display_to?(person)
+  end
+
+  should 'not display to other unauthenticated user if private' do
+    # a person with private contents ...
+    person = create_user('testuser').person
+    person.update_attributes!(:public_content => false)
+
+    # ... has an article ...
+    a1 = person.articles.create!(:name => 'test article')
+
+    # ... which anonymous users cannot view
+    assert_equal false, a1.display_to?(nil)
+  end
+
+  should 'not display to another user if private' do
+    # a person with private contents ...
+    person = create_user('testuser').person
+    person.update_attributes!(:public_content => false)
+
+    # ... has an article ...
+    a1 = person.articles.create!(:name => 'test article')
+
+    # ... which another user cannot see
+    another_user = create_user('another_user').person
+    assert_equal false, a1.display_to?(another_user)
+  end
+
+  should 'display for members of profile' do
+    # a community with private content ...
+    community = Community.create!(:name => 'test community')
+    community.update_attributes!(:public_content => false)
+
+    # ... has an article ...
+    a1 = community.articles.create!(:name => 'test article')
+
+    # ... and its members ...
+    member = create_user('testuser').person
+    community.add_member(member)
+
+    # ... can view that article
+    assert_equal true, a1.display_to?(member)
+  end
+
 end
--
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