Vector PC-Duo Gateway Manual page 27

transparent every time two PC-Duo 5.20 components or later are communicating with
each other.
By default, PC-Duo Express and PC-Duo Enterprise uses AES 256-bit encryption,
however other encryption options can be set, including:

AES encryption (256-bit key) with SHA1 hash

AES encryption (192-bit key) with SHA1 hash

AES encryption (128-bit key) with SHA1 hash

Triple-DES (3DES) encryption (192-bit key) with SHA1 hash

RC4-compatible encryption (128-bit key) with MD5 hash
NOTE: PC-Duo 5.10 applications and older support only RC4 encryption; thus, this would be the
encrpytion option negotiated between a PC-Duo 5.20 or later application (e.g. PC-Duo Master)
and PC-Duo 5.10 application (e.g. PC-Duo Host).
Order of precedence
When two PC-Duo components have different encryption options set, the first encryption
choice in common between the two is used (going down the list in order), with preference
set as follows:

Preference set by the Host, when the Gateway requests connection to the Host

Preference set by the Gateway, when the Master requests connection to a Host
through the Gateway
PC-Duo Overview
27