diff --git a/docs/source/authentication.rst b/docs/source/authentication.rst
new file mode 100644
index 0000000..7262511
--- /dev/null
+++ b/docs/source/authentication.rst
@@ -0,0 +1,13 @@
+.. _authentication:
+
+Authentication
+==============
+
+For Document Service authentication **Basic Authenication scheme** (see :rfc:`2617#section-2`) is used. 
+
+In this scheme:
+
+ * **Username** is broker's id
+ 
+ * **Password** is API key for Document Service
+
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 2907e1a..ed2fd4f 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -22,6 +22,7 @@ Contents:
    :maxdepth: 2
 
    overview
+   authentication
    tutorial
    
 Indices and tables
diff --git a/docs/source/locale/uk/LC_MESSAGES/authentication.po b/docs/source/locale/uk/LC_MESSAGES/authentication.po
new file mode 100644
index 0000000..0a3b866
--- /dev/null
+++ b/docs/source/locale/uk/LC_MESSAGES/authentication.po
@@ -0,0 +1,39 @@
+# 
+msgid ""
+msgstr ""
+"Project-Id-Version: openprocurement.documentservice 1.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2016-10-18 16:20+0300\n"
+"PO-Revision-Date: 2016-10-18 16:29+0200\n"
+"Last-Translator: Zoriana Zaiats <sorenabell@quintagroup.com>\n"
+"Language-Team: Ukrainian <support@quintagroup.com>\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: Babel 2.3.4\n"
+"Language: uk\n"
+"Plural-Forms: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<"
+"=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
+"X-Generator: Lokalize 2.0\n"
+
+msgid "Authentication"
+msgstr "Аутентифікація"
+
+msgid ""
+"For Document Service authentication **Basic Authenication scheme** (see "
+":rfc:`2617#section-2`) is used."
+msgstr ""
+"Для аутентифікації Document Service використовується **схема базової"
+" аутентифікації** (див. "
+":rfc:`2617#section-2`)."
+
+msgid "In this scheme:"
+msgstr "У цій схемі:"
+
+msgid "**Username** is broker's id"
+msgstr "**Ім'я користувача** - ідентифікатор майданчика"
+
+msgid "**Password** is API key for Document Service"
+msgstr "**Пароль** - API ключ для Document Service"
+
+
diff --git a/docs/source/locale/uk/LC_MESSAGES/index.mo b/docs/source/locale/uk/LC_MESSAGES/index.mo
index bfcadf3..fec69e5 100644
Binary files a/docs/source/locale/uk/LC_MESSAGES/index.mo and b/docs/source/locale/uk/LC_MESSAGES/index.mo differ
diff --git a/docs/source/locale/uk/LC_MESSAGES/index.po b/docs/source/locale/uk/LC_MESSAGES/index.po
index 21b917f..7857ebd 100644
--- a/docs/source/locale/uk/LC_MESSAGES/index.po
+++ b/docs/source/locale/uk/LC_MESSAGES/index.po
@@ -16,11 +16,9 @@ msgstr ""
 "=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
 "X-Generator: Lokalize 2.0\n"
 
-#: ../../source/index.rst:12
 msgid "Welcome to openprocurement.documentservice's documentation!"
 msgstr "Вітаємо на сайті документації по openprocurement.documentservice!"
 
-#: ../../source/index.rst:14
 msgid ""
 "Please report any problems or suggestions for improvement either via the "
 "`mailing list <http://groups.google.com/group/open-procurement-general>`_"
@@ -32,19 +30,15 @@ msgstr ""
 "через `issue tracker "
 "<https://github.com/openprocurement/openprocurement.documentservice/issues>`_."
 
-#: ../../source/index.rst:19
 msgid "Contents:"
 msgstr "Зміст:"
 
-#: ../../source/index.rst:27
 msgid "Indices and tables"
 msgstr "Індекси та таблиці"
 
-#: ../../source/index.rst:29
 msgid ":ref:`genindex`"
 msgstr ":ref:`genindex`"
 
-#: ../../source/index.rst:30
 msgid ":ref:`search`"
 msgstr ":ref:`search`"
 
diff --git a/docs/source/locale/uk/LC_MESSAGES/overview.mo b/docs/source/locale/uk/LC_MESSAGES/overview.mo
index df39650..cd87101 100644
Binary files a/docs/source/locale/uk/LC_MESSAGES/overview.mo and b/docs/source/locale/uk/LC_MESSAGES/overview.mo differ
diff --git a/docs/source/locale/uk/LC_MESSAGES/overview.po b/docs/source/locale/uk/LC_MESSAGES/overview.po
index b902e89..1cc3e9e 100644
--- a/docs/source/locale/uk/LC_MESSAGES/overview.po
+++ b/docs/source/locale/uk/LC_MESSAGES/overview.po
@@ -16,20 +16,16 @@ msgstr ""
 "=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
 "X-Generator: Lokalize 2.0\n"
 
-#: ../../source/overview.rst:2
 msgid "Overview"
 msgstr "Огляд"
 
-#: ../../source/overview.rst:5
 msgid "Documentation of related packages"
 msgstr "Документація пов’язаних пакетів"
 
-#: ../../source/overview.rst:7
 msgid "`OpenProcurement API <http://api-docs.openprocurement.org/en/latest/>`_"
 msgstr ""
 "`OpenProcurement API <http://api-docs.openprocurement.org/uk_UA/latest/>`_"
 
-#: ../../source/overview.rst:9
 msgid ""
 "`Open tender procedure (OpenUA) <http://openua.api-"
 "docs.openprocurement.org/en/latest/>`_"
@@ -37,7 +33,6 @@ msgstr ""
 "`Відкриті торги (OpenUA) <http://openua.api-"
 "docs.openprocurement.org/uk/latest/>`_"
 
-#: ../../source/overview.rst:11
 msgid ""
 "`Open tender procedure with publication in English (OpenEU) "
 "<http://openeu.api-docs.openprocurement.org/en/latest/>`_"
@@ -45,7 +40,6 @@ msgstr ""
 "`Відкриті торги з публікацією англійською мовою (OpenEU) <http://openeu.api-"
 "docs.openprocurement.org/uk/latest/>`_"
 
-#: ../../source/overview.rst:13
 msgid ""
 "`Reporting, negotiation procurement procedure and negotiation procedure "
 "for the urgent need  <http://limited.api-"
@@ -55,7 +49,6 @@ msgstr ""
 "переговорна процедура за нагальною потребою <http://limited.api-"
 "docs.openprocurement.org/uk/latest/>`_"
 
-#: ../../source/overview.rst:15
 msgid ""
 "`Defense open tender <http://defense.api-"
 "docs.openprocurement.org/en/latest/>`_"
@@ -63,7 +56,6 @@ msgstr ""
 "`Процедура відкритих торгів для оборонних цілей <http://defense.api-"
 "docs.openprocurement.org/uk/latest/>`_"
 
-#: ../../source/overview.rst:17
 msgid ""
 "`Contracting API interface to OpenProcurement database "
 "<http://contracting.api-docs.openprocurement.org/en/latest/>`_"
@@ -71,7 +63,6 @@ msgstr ""
 "`API для реєстрації даних пов’язаних з договором <http://contracting.api-"
 "docs.openprocurement.org/uk/latest/>`_"
 
-#: ../../source/overview.rst:19
 msgid ""
 "`Relocation API <http://relocation.api-"
 "docs.openprocurement.org/en/latest/>`_"
diff --git a/docs/source/locale/uk/LC_MESSAGES/tutorial.mo b/docs/source/locale/uk/LC_MESSAGES/tutorial.mo
index 5bd0d32..b528b65 100644
Binary files a/docs/source/locale/uk/LC_MESSAGES/tutorial.mo and b/docs/source/locale/uk/LC_MESSAGES/tutorial.mo differ
diff --git a/docs/source/locale/uk/LC_MESSAGES/tutorial.po b/docs/source/locale/uk/LC_MESSAGES/tutorial.po
index 1f2a1a9..3285adf 100644
--- a/docs/source/locale/uk/LC_MESSAGES/tutorial.po
+++ b/docs/source/locale/uk/LC_MESSAGES/tutorial.po
@@ -16,31 +16,24 @@ msgstr ""
 "=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
 "X-Generator: Lokalize 2.0\n"
 
-#: ../../source/tutorial.rst:4
 msgid "Tutorial"
 msgstr "Туторіал"
 
-#: ../../source/tutorial.rst:9
 msgid "Upload document with registration"
 msgstr "Завантаження документа з реєстрацією"
 
-#: ../../source/tutorial.rst:14
 msgid "Register document upload:"
 msgstr "Зареєструвати завантаження документа:"
 
-#: ../../source/tutorial.rst:19
 msgid "or:"
 msgstr "або:"
 
-#: ../../source/tutorial.rst:27
 msgid "Upload document:"
 msgstr "Завантажити документ:"
 
-#: ../../source/tutorial.rst:35
 msgid "Upload document w/o registration"
 msgstr "Завантаження документа без реєстрації"
 
-#: ../../source/tutorial.rst:43
 msgid "Get document"
 msgstr "Отримання документа"