APC Battery Management System User Manual download pdf (Page 130)

USER’S GUIDE

Battery Management System

123

– The length of the public key (RSA key) that is used for encryption

when setting up an SSL session is 1024 bits, providing more

complex encryption and consequently a higher level of security than

the public key used in Method 1. (This longer encryption key is also

used in Method 3.)

– 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 root certificate that you install to the browser enables the

browser to authenticate the Management Card’s server certificate to

provide additional protection from unauthorized access.

• Disadvantage:

Because the certificates do not have the digital signature of a

commercial Certificate Authority, you must load a root certificate

individually into the certificate store (cache) of each user’s

browser. (Browser manufacturers already provide root certificates

for commercial Certificate Authorities in the certificate store within

the browser. See Method 3.)

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APC Battery Management System User Manual Page 130