In regards to traffic between clients and server:SNMP v1 and v2.c do not allow encryption, they send all information in cleartext, including the community string. This is not a limitation of Lansweeper, it is how these protocols are designed.
SNMP v3, SSH and WMI connections should be encrypted unless you went through a lot of trouble to disable the encryptions.
In regards to data as it is stored in the database itself:Scanned data isn't encrypted in the database; only scanning credentials are. If your database is hosted in SQL Server, we recommend
changing the database password for added security.
Credentials are transferred to the service memory when the Lansweeper service starts. When Lansweeper needs to pass them to a machine, it uses the default Windows authentication that's configured (most likely NTLMv2 or Kerberos). The login/password details are never sent over the wire.