TABLE 10.

User testing results for pEp regarding the number of users who tested an MUA and who failed for a specific sub-task.

MUA	# Users tested	Tasks	Subtasks	Failed
pEp (Android)	3	Configuration	Install pEp mail app
			Perform handshake by communicating and comparing the trust words out of band	1
		Mail composition	Write a secure e-mail
			Verify if incoming e-mail is secure
Thunderbird (desktop)	4	Configuration	Install Enigmail plugin from add-on browser
			Force using pEp	2
			Perform handshake by communicating and comparing the trust words out of band
		Mail composition	Write a new secure e-mail
			Verify if incoming e-mail is secure