User’s guide, Battery management system – APC Battery Management System User Manual
Page 132
®
USER’S GUIDE
Battery Management System
125
consequently a higher level of security than the public key used in
Method 1 (This longer encryption key is also used in Method 2.)
– The server certificate that you upload to the Management Card
enables SSL to authenticate that data are being received from and
sent to the correct Management Card. This provides an extra level
of security beyond the encryption of the user name, password, and
transmitted data.
– The browser matches the digital signature on the server certificate
that you uploaded to the Management Card with the signature on
the CA root certificate that is already in the browser’s certificate
cache to provide additional protection from unauthorized access.
•
Disadvantages:
– Setup requires the extra step of requesting a signed root certificate
from a Certificate Authority.
– An external Certificate Authority may charge a fee for providing
signed certificates.