TABLE 8.
User testing results for S/MIME regarding the number of users who tested an MUA and who failed for a specific sub-task.
| MUA | # Users tested | Tasks | Subtasks | Failed |
|---|---|---|---|---|
| Outlook 2016 (desktop) | 5 | Configuration | Get a certificate | |
| Unzip to get the pfx file | ||||
| Import a certificate | ||||
| Mail composition | Write a secure e-mail | 4 | ||
| Verify if incoming e-mail is secure | 1 | |||
| Thunderbird (desktop) | 3 | Configuration | Get a certificate | |
| Unzip to get the pfx file | ||||
| Import a certificate | ||||
| Mail composition | Write a new secure e-mail | |||
| Verify if incoming e-mail is secure | ||||
| Apple mail (MacOS desktop) | 1 | Configuration | Get a certificate | |
| Unzip to get the pfx file | 1 | |||
| Import a certificate | ||||
| Mail composition | Write a new secure e-mail | |||
| Verify if incoming e-mail is secure | ||||
| Apple mail (iOS 12) | 1 | Configuration | Get a certificate | |
| Unzip to get the pfx file | ||||
| Transfer pfx file to the mobile device | 1 | |||
| Activate S/MIME. | ||||
| Import a certificate | ||||
| Mail composition | Write a new secure e-mail | |||
| Verify if incoming e-mail is secure | 1 | |||
| Maildroid (Android) | 1 | Configuration | Get a certificate | |
| Unzip to get the pfx file | ||||
| Install cryptoplugin | ||||
| Transfer pfx file to the mobile device | 1 | |||
| Import a certificate | ||||
| Mail composition | Write a new secure e-mail | |||
| Verify if incoming e-mail is secure |