Update DCT docs with 1.11 info, fix typos

Signed-off-by: Riyaz Faizullabhoy <riyaz.faizullabhoy@docker.com>
(cherry picked from commit 77da3bcb72)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

docs/security/trust/content_trust.md

@@ -13,15 +13,11 @@ weight=-1
 
 When transferring data among networked systems, *trust* is a central concern. In
 particular, when communicating over an untrusted medium such as the internet, it
-is critical to ensure the integrity and publisher of all the data a system
-operates on. You use Docker to push and pull images (data) to a registry. Content trust
-gives you the ability to both verify the integrity and the publisher of all the
+is critical to ensure the integrity and the publisher of all the data a system
+operates on. You use Docker Engine to push and pull images (data) to a public or private registry. Content trust
+gives you the ability to verify both the integrity and the publisher of all the
 data received from a registry over any channel.
 
-Content trust is currently only available for users of the public Docker Hub. It
-is currently not available for the Docker Trusted Registry or for private
-registries.
-
 ## Understand trust in Docker
 
 Content trust allows operations with a remote Docker registry to enforce
@@ -82,7 +78,7 @@ desirable, unsigned image tags are "invisible" to them.
 
 ![Trust view](images/trust_view.png)
 
-To the consumer who does not enabled content trust, nothing about how they
+To the consumer who has not enabled content trust, nothing about how they
 work with Docker images changes. Every image is visible regardless of whether it
 is signed or not.
 
@@ -127,7 +123,7 @@ The following image depicts the various signing keys and their relationships:
 >tag from this repository prior to the loss.
 
 You should backup the root key somewhere safe. Given that it is only required
-to create new repositories, it is a good idea to store it offline.
+to create new repositories, it is a good idea to store it offline in hardware.
 For details on securing, and backing up your keys, make sure you
 read how to [manage keys for content trust](trust_key_mng.md).
 
@@ -198,11 +194,12 @@ When you push your first tagged image with content trust enabled, the  `docker`
 client recognizes this is your first push and:
 
  - alerts you that it will create a new root key
- - requests a passphrase for the key
+ - requests a passphrase for the root key
  - generates a root key in the `~/.docker/trust` directory
+ - requests a passphrase for the repository key
  - generates a repository key for in the `~/.docker/trust` directory
 
-The passphrase you chose for both the root key and your content key-pair
+The passphrase you chose for both the root key and your repository key-pair
 should be randomly generated and stored in a *password manager*.
 
 > **NOTE**: If you omit the `latest` tag, content trust is skipped. This is true
@@ -267,7 +264,7 @@ Because the tag `docker/cliffs:latest` is not trusted, the `pull` fails.
 
 ### Disable content trust for specific operations
 
-A user that wants to disable content trust for a particular operation can use the
+A user who wants to disable content trust for a particular operation can use the
 `--disable-content-trust` flag. **Warning: this flag disables content trust for
 this operation**. With this flag, Docker will ignore content-trust and allow all
 operations to be done without verifying any signatures. If we wanted the

docs/security/trust/deploying_notary.md

@@ -21,7 +21,7 @@ The easiest way to deploy Notary Server is by using Docker Compose. To follow th
         docker-compose up -d
 
 
-    For more detailed documentation about how to deploy Notary Server see https://github.com/docker/notary.
+    For more detailed documentation about how to deploy Notary Server see the [instructions to run a Notary service](/notary/running_a_service.md) as well as https://github.com/docker/notary for more information.
 3. Make sure that your Docker or Notary client trusts Notary Server's certificate before you try to interact with the Notary server.
 
 See the instructions for [Docker](../../reference/commandline/cli.md#notary) or

docs/security/trust/trust_automation.md

@@ -10,7 +10,7 @@ parent= "smn_content_trust"
 
 # Automation with content trust
 
-Your automation systems that pull or build images can also work with trust. Any automation environment must set `DOCKER_TRUST_ENABLED` either manually or in in a scripted fashion before processing images.
+Your automation systems that pull or build images can also work with trust. Any automation environment must set `DOCKER_TRUST_ENABLED` either manually or in a scripted fashion before processing images.
 
 ## Bypass requests for passphrases
 
@@ -43,7 +43,7 @@ Signing and pushing trust metadata
 
 ## Building with content trust
 
-You can also build with content trust. Before running the `docker build` command, you should set the environment variable `DOCKER_CONTENT_TRUST` either manually or in in a scripted fashion. Consider the simple Dockerfile below.
+You can also build with content trust. Before running the `docker build` command, you should set the environment variable `DOCKER_CONTENT_TRUST` either manually or in a scripted fashion. Consider the simple Dockerfile below.
 
 ```Dockerfile
 FROM docker/trusttest:latest

docs/security/trust/trust_delegation.md

@@ -18,7 +18,7 @@ sharing your repository key (a combination of your targets and snapshot keys -
 please see "[Manage keys for content trust](trust_key_mng.md)" for more information).
 A collaborator can keep their own delegation key private.
 
-The `targest/releases` delegation is currently an optional feature - in order
+The `targets/releases` delegation is currently an optional feature - in order
 to set up delegations, you must use the Notary CLI:
 
 1. [Download the client](https://github.com/docker/notary/releases) and ensure that it is
@@ -40,7 +40,7 @@ available on your path
 
 For more detailed information about how to use Notary outside of the default
 Docker Content Trust use cases, please refer to the
-[the Notary CLI documentation](https://docs.docker.com/notary/getting_started/).
+[the Notary CLI documentation](/notary/getting_started.md).
 
 Note that when publishing and listing delegation changes using the Notary client,
 your Docker Hub credentials are required.

docs/security/trust/trust_key_mng.md

@@ -37,7 +37,7 @@ workflow.  They need to be
 
 Note: Prior to Docker Engine 1.11, the snapshot key was also generated and stored
 locally client-side. [Use the Notary CLI to manage your snapshot key locally
-again](https://docs.docker.com/notary/advanced_usage/#rotate-keys) for
+again](/notary/advanced_usage.md#rotate-keys) for
 repositories created with newer versions of Docker.
 
 ## Choosing a passphrase
@@ -64,6 +64,16 @@ Before backing them up, you should `tar` them into an archive:
 $ umask 077; tar -zcvf private_keys_backup.tar.gz ~/.docker/trust/private; umask 022
 ```
 
+## Hardware storage and signing
+
+Docker Content Trust can store and sign with root keys from a Yubikey 4. The
+Yubikey is prioritized over keys stored in the filesystem. When you initialize a
+new repository with content trust, Docker Engine looks for a root key locally. If a
+key is not found and the Yubikey 4 exists, Docker Engine creates a root key in the
+Yubikey 4. Please consult the [Notary documentation](/notary/advanced_usage.md#use-a-yubikey) for more details.
+
+Prior to Docker Engine 1.11, this feature was only in the experimental branch.
+
 ## Lost keys
 
 If a publisher loses keys it means losing the ability to sign trusted content for