Meshlets supports reading data from a source (such as ServiceNow) that was encrypted. By default meshlets will read in data that is Base64 Encoded but the following encryption methods are supported: 

Encryption MethodRequired Encryption Key length

TripleDES

At least 24 characters
AES-128At least 24 characters 
AES-25632 characters or more

(info) NOTE: Starting in 6.1.0 release, meshlets support reading multibyte_encrypted messages.