The log files (enabled from /admin | System Status | Archive Log Settings) are ZIP'ed files, containing unencrypted plain text files with the .DAT extension.
These include TPAM logs such as Password Check Log, Password Change Log, Release Requests, Sysadmin logs. The list of files below:
ActivityLog.dat
ADIntegrationAgentLog.dat
AlertLog.dat
AutoDiscoveryLog.dat
BatchStats.dat
ChangeLog.dat
DataExtractLog.dat
EGPArchiveLog.dat
FileReleaseLog.dat
FileReleaseRequest.dat
ISARelease.dat
MailAgentLog.dat
OutgoingMail.dat
PasswordChangeLog.dat
PasswordCheckLog.dat
PostSessionProcessingLog.dat
PwdChgAgentLog.dat
PwdChkAgentLog.dat
ReleaseLog.dat
ReleaseRequestEGP.dat
ReleaseRequestPAR.dat
SecurityLog.dat
SessionServerLog.dat
SyncPassChangeLog.dat
SysAdminLog.dat
syslogd.dat
TestResults.dat
vwBackupLog.dat
The filename is named Logs_yyyymmdd_xxxxxx.zip