Got it. I was thinking that for bigger groups, it might be hard for members to keep track of who got deleted when and by whom, so it might be easier for a deleted user to slip back in without attracting notice. Your…
I noticed this from the paper: > Note that a user who has acquired a group’s GroupMasterKey and then leaves the group (or is deleted) retains the ability to collude with a malicious server to encrypt and decrypt group…
Got it. I was thinking that for bigger groups, it might be hard for members to keep track of who got deleted when and by whom, so it might be easier for a deleted user to slip back in without attracting notice. Your…
I noticed this from the paper: > Note that a user who has acquired a group’s GroupMasterKey and then leaves the group (or is deleted) retains the ability to collude with a malicious server to encrypt and decrypt group…