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What is the best alternative to XScreenSaver?
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XSecureLock
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Experiences
Pros
1
Cons
2
Top
Con
Cannot auto-lock after a certain time
By itself it doesn't support locking the screen after a certain duration of inactivity. See here.
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Pro
Created by Google with security in mind
Authentication and screen saving in separate processes so that crash of these processes will not unlock the screen. The main process is kept minimal for easy auditing. The main process regularly refreshes the screen grabs (just in case). The main process regularly brings its window to the front, to avoid leaking notifications. The main process resizes its window to the size of the root window, avoid leaking information by attaching a secondary display. The main processes uses only a single buffer - to hold a single keystroke. Therefore it is impossible to exploit a buffer overrun in the main process by e.g. an overlong password entry. The only exit condition of the program is the Authentication Module returning with exit status zero, on which xsecurelock itself will return with status zero; therefore especially paranoid users might want to run it as sh -c "xsecurelock ... || kill -9 -1" :)
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Con
Complex installation
Need to compile from sources for most distro and to also manually call it to lock the screen. See here.
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