1. Graphical VS Textual Presented by Ding Li Nicholas Wright, Andrew S. Patrick, and Robert Biddle. “Do you see your password? Applying recognition to textual passwords.” In Proceedings of the Eighth Symposium on Usable Privacy and Security, p. 8. ACM, 2012.

2. From the article "Text password systems could potentially benefit from the work that has gone into the development of the new recognition- based methods, without resorting to the use of graphical materials. " "Twenty-nine (or 80.6%) of respondents had English as a first language, and the other seven (or 19.4%) spoke English as a second language."

3. How people choose textual password Easy to rememberHard to guess my brithday my phone num or my brithday+phone num

4. Why we need a graphical password more human- friendly passwords 15z8h69xA35!

5. Is a graphical password as secure as text- based passwords? NAMEText-base Recognition Based Techniques Recall Based Techniques PASSWORD SPEACE 94^NN!/K! (N-K)!Unlimited Attack brute-force dictionary guessing spy software shoulder surfing brute-force guessing shoulder surfing dictionary guessing shoulder surfing

6. Drawback Password registration and log-in process take too long. Require much more storage space than textual/character passwords. Shoulder surfing

7. Possible solution

8. Summary Although there could be new recognition- based methods for textual password, but the language barriers still exist Password should be more humen-friendly.

9. Question ？