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One needs to consider relative risk when deciding what to remediate first. For a client-server app, I see four possible considerations:

  1. The client gets hacked
  2. Someone listens on your network
  3. Someone hacks the storage on your server
  4. Someone hacks the server app itself

Risk 1 is minimized through strong authentication methods, and minimizing the amount of data that the client actually receives.

Risk 2 is minimized by encrypting traffic between systems; see Crypt-SSLeay

Risk 3 is minimized by encrypting the data store. I'm not enough of an expert to suggest a specific solution.

Risk 4 might be minimized by using a compiled language, and including code that checksums the binary when it first runs.

Personally, I think that the risk of 4 is so low, that everyone but government spy agencies can probably ignore it -- and they should be using a secure operating system that does that kind of thing automatically. For us mortals, risk #2 is the highest; if you are legitimately scared enough that you need to do more than #1 and #2, you probably shouldn't be using uncompiled Perl because of the risk that someone would read the source code and be able to reverse-engineer your data.


In reply to Re: Good IPC Message Protocols? by papidave
in thread Good IPC Message Protocols? by pileofrogs

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