Puppy comes with its own security or you can get one from software center.
The only security system I've seen in Package Manager for Precise is ClamAV, which as far as I understand is an older version that's no longer supported. I had problems installing it, and I have been unable to find anyone who actually uses it to verify that the virus definitions for that version are still being updated.
I have F-Prot installed on Lucid that I downloaded from F-Prot, but it's designed for scanning Window's partitions and trying to scan Puppy with it results in continual segmentation fault errors.
There is an older version of F-Prot in Package Manager on Lucid, which I also installed to another installation just to try it out, but couldn't get the virus definitions to update so assume it's an older version that's no longer supported.
Possibly the easiest option for a Puppy user who wants to be as sure as they can be that they have an operating system that has not been compromised, and I'm not suggesting there is a realistic chance of that happening... but to be on the ultra-safe side one could use an additional Puppy on a multi-session CD, for things like internet banking and financial transactions etc and even browsing the internet in general - set the CD up once and save settings and bookmarks or whatever at the end of the session, then never save anything to it again.
Or, using Puppy in ''live'' mode it's also possible to set a savefile on USB (and I should imagine HD as well), by editing the relevant system file, so that there are no automatic saves including at shut down. I have a Lucid savefile on USB set up this way, and the only way to save to it is to use the ''save'' icon on the desktop. So if I do want to change settings or install software etc, I can do so straight after booting up, press the save icon straight after I've changed whatever I'm changing, and be as sure as I can be that that's all that I am saving.
No doubt spending their time trying to hack Windows, and even Mint and Ubuntu etc, would prove far more productive for unscrupulous hackers that trying to get the better of us security conscious Puppy users.
Edited by Al1000, 25 June 2014 - 10:42 AM.