TABLE 6.
User testing results for PGP 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) | 1 | Configuration | Install Gpg4o plugin | |
| Key management | Import or generate key pair | |||
| Get recipient key | 1 | |||
| Mail composition | Write a new secure e-mail | 1 | ||
| Verify if incoming e-mail is secure | ||||
| Thunderbird (desktop) | 2 | Configuration | Install Enigmail plugin | |
| Activate PGP in settings menu | ||||
| Enforce usage of PGP in account settings | 1 | |||
| Key management | Import or generate key pair | |||
| Get recipient key | 1 | |||
| Mail composition | Write a new secure e-mail | |||
| Verify if incoming e-mail is secure | ||||
| FlowCrypt (gmail webmail) | 2 | Configuration | Install FlowCrypt browser plugin | |
| Key management | Choose passphrase | |||
| Mail composition | Write a new secure e-mail | |||
| Verify if incoming e-mail is secure | 1 | |||
| Maildroid (Android) | 1 | Configuration | Install cryptoplugin app from google PlayStore | |
| Key management | Generate key pair externally via PC software or online service | 1 | ||
| Transfer externally generated key to mobile device | 1 | |||
| Import key pair | ||||
| Get recipient key | ||||
| Mail composition | Write a new secure e-mail | |||
| Verify if incoming e-mail is secure |