Aufgaben:
- Neuen Kontakt hinzufügen
- Nachricht verschicken auf den Wegen:
- Unsicher
- Verschlüsselt
- Authentifiziert
Beachtet
- Jedes Mitglied der Gruppe macht die Analyse für die Themenfelder der Gruppe (s.o.) selber (= keine Zusammenarbeit), da jede Person andere Fehler findet, sodass sich die Analysen ergänzen.
- Bitte so dokumentieren, dass die Analyse und ihre Ergebnisse dem Lehrenden (Jan) und dem ChatSecure Team verständlich sind. Schreibt auf Englisch (wenn möglich, sonst Deutsch) und nutzt Screenshots oder Skizzen.
________________
Heuristic analysis for ChatSecure
1. Visibility of system status
- Sending messages: The lock kept open, when I clicked on “start OTR”, so it didn`t work and I don`t even know why. (Description box needed!)Later I realized it will only work if the chat partner is online. I would like to send a secure message to an offline person, but don`t know how. Need I download the OTR Keystore then? This friend also didn`t receive my messages at all and I didn`t know that, because no error sign occurred. (See “error prevention”)
- Add contacts: When I added a contact, he showed up in the contact list twice. I deleted one of them… later “both” accounts were gone, so I fully deleted the contact by accident.
2. Match between system and the real world
- Sending messages: I have no knowledge in computer science, so I would like to have a little explanation about what OTR or this OTR Keystore is. I would like to read easier words, like “start secure messaging” that don`t make me wonder what I am doing. Furthermore, I only found the “import OTR keystore”-button just by accident!
- Add contacts: No problem.
3. User control and freedom
- Sending messages: All ok.
- Add contacts: All ok.
4. Consistency and standards
- Sending messages: No problems.
- Add contacts: The touch screen doesn`t work sometimes, when clicking on “Add a contact”.
5. Error prevention
- Sending messages: I didn’t know my messages weren’t sent at all. My message window was all empty. I couldn`t see that I did not send my friend something nor could I see her messages.
- Add contacts: I didn`t know, it would delete the “right” account, too.
6. Recognition rather than recall
- Sending messages: Didn`t understand the box that plopped out, when I wanted to import the OTR keystore. (And don`t know what it is for, by the way.) It was only open for a few seconds, so I couldn`t read all of it. After I read it 3 times, I still didn`t found this file, the window wanted to lead me to.
- Add contacts: After typing in the name in the contact box, I wanted to click on “invite”. For that I clicked in the red box below, because I intuitively thought, I would come to the interface before. Maybe it is better to place the “invite”-button somewhere in the red box, because you won`t have to click the keypad away then.
the "invite" button is unseen
the interface before
7. Flexibility and efficiency of use
- Sending messages: No problem.
- Add contacts: Everything ok.
8. Aesthetic and minimalist design
- Sending messages: I clicked on someone on the contact-list. The message window opened and I typed something. So now, to write another person, I needed to slide over many people before I got to the “general” contact list, where all friends are listed. I think having the general list in one slide is way easier.
The “general” contact list
- Add contacts: Is ok.
9. Help users recognize, diagnose, and recover from errors
- Sending messages: See points 1 and 5.
- Add contacts: See points 1 and 5.
10. Help and documentation
- Sending messages: As said before, I would like to have some explanation what an OTR is. Or just easier words and an extra field for “how it functions” in the settings.
- Add contacts: Everything ok.
Rework of the older paper-prototyp
