On Wed, Jan 29, 2014 at 3:05 PM, Jorge Garcia <calcp...@aol.com> wrote: > I just signed up for an account at http://cloud.sagemath.org and like what I > see! Amazing job, guys, keep it up! > > I have 2 questions: > (1) I had a heck of a time creating an account as the server did not like my > password. I can see my students wasting class time with this. Any way this > could be changed?
SMC uses the password strength library, from Dropbox: https://tech.dropbox.com/2012/04/zxcvbn-realistic-password-strength-estimation/ Right now SMC is somewhat permissive allowing anything but "Very weak" passwords when creating an account; anything listed as very weak could trivially be cracked using a dictionary attack (the dropbox checker uses a dictionary of the top most common n-thousand weak passwords). I don't know what passwords you were trying, but I strongly encourage you to switch to a better system for choosing passwords for all your accounts (not just SMC), or maybe just use something like https://lastpass.com/. I don't want anybody to use SMC if they can't choose a password that isn't "very weak". If anything, I will probably change the password strength requirement in the other direction to require stronger passwords, rather than allowing weaker ones. (Of course I do have countermeasures in place to make an external dictionary attack very, very slow; however, if anybody ever got the password hash database, I want their work to be difficult. The passwords are hashed with 1000 iterations of Sha-512, in case anyone is interested.) > (2) I currently use a server where I publish my worksheets to share with my > students. I don't see this option in the cloud. Can one do the same in the > cloud version? The analogue in SMC is to create a project specifically for sharing worksheets. You would then add all your students as collaborators on the project. You can do this by clicking the settings "wrench" icon in a project, then pasting in a comma-separated list of email addresses next to "Collaborators" and clicking the button. When those people join SMC, they will automatically also see that project. You can put worksheets there for them to use. Moreover, as they use them, you can open them at the same time, see their cursors moving around, use the chat on the right, and if you are both using Google Chrome, you can type sage_chat() in a cell to get a video chat (very new feature). -- William > > TIA, > A. Jorge Garcia > http://shadowfaxrant.blogspot.com > http://www.youtube.com/calcpage2009 > > -- > You received this message because you are subscribed to the Google Groups > "sage-edu" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-edu+unsubscr...@googlegroups.com. > To post to this group, send email to sage-edu@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-edu. > For more options, visit https://groups.google.com/groups/opt_out. -- William Stein Professor of Mathematics University of Washington http://wstein.org -- You received this message because you are subscribed to the Google Groups "sage-edu" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-edu+unsubscr...@googlegroups.com. To post to this group, send email to sage-edu@googlegroups.com. Visit this group at http://groups.google.com/group/sage-edu. For more options, visit https://groups.google.com/groups/opt_out.
