Special characters in SNMPv3 key and privacy strings?

[#1]

I have a valid snmpv3 user/key/privacy strings that work in all my Cisco routers, but does not work in Infoblox.  If I change to strings to something else without special characters, the access works.  I am pretty sure there is some character in one of my 3 strings that infoblox does not like and does not actually add into the settings.  I cannot find any published materials that describe the valid or invalid characters IB allows.

Here are the characters dispersed through my strings that might be special..

* @ \ . ^ &

Our corporate password policies do not allow me to use just numbers and letters.