EXPERT RESPONSE
Your question gets the honor of receiving my favorite answer to security questions: It depends! There really isn't a cut-and-dry answer to whether encryption should be used for log traffic (or any other traffic, for that matter). You need to ask yourself a few questions:
What data is contained in the log files?
Do they contain confidential information?
Do they contain data that would assist someone attempting to compromise your system?
Where is the transmission taking place? Is it on a secured internal network, or are the logs being sent over a public network?
If you're dealing with extremely confidential logs or ones that traverse public networks, encryption is most likely worth the expense. Otherwise, it may not be necessary.
More information:
Look before leaping into database encryption.
Take the pain out of log analysis.
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