The steps for setting up issue-level permissions are as follows:

1. Since Jira does not come with any default issue security schemes, the first step is to create a new one from scratch:
   1. Navigate to Administration > Issues > Issue security schemes.
   2. Click on the Add issue security scheme link.
   3. Enter a name for the new scheme and then click on Add.
2. The second step is to set up the security levels that you can choose from, such as Internal Users Only:
   1. Click on the Security Levels link for our new issue security scheme.
   2. Enter the name for each security level and click on the Add Security Level button.

The following screenshot shows the three existing security levels:

3. After we have set up the security levels, the third step is to grant users access to each of the security levels that you have defined:
   1. Click on the Add link for the security level you want to set up the user access for.
   2. Select the permission option and click on the Add button.

The following screenshot displays the different options you have while granting security levels:

4. Now that we have all of the security levels set up, the last step is to apply the issue security scheme to our project:
   1. Go to the project you want to apply the issue security scheme to and click on the Administration tab.
   2. Select the Issue Security option on the left-hand side and click on the Select a scheme option from the Actions menu.
   3. Select the new issue security scheme and click on Next.
   4. If the project is not empty, Jira asks you to select a default security level for all of the issues. You can select the None option so that all issues remain as they are, or you can select a security level that is applied to all issues.
   5. Click on the Associate button:

As you can see in the preceding screenshot, the issue security scheme is now applied to the project.