Possible Reader refresh bug when viewing a "tampered" pdf after it has been signed

hi

 

we have signed pdf using self-signed certificate (for now) , have told our adobe reader x (v 10.1.3) on windows 7, trust signature. viewing signed pdf in reader x, nicely shows message: "signed , signatures valid". that's good.

now tried, see whether reader x detect tampering: we've modified pdf using goodreader on ipad. when view pdf in reader x, shows "at least 1 signature requires validating", kinda confusing. when opening signature panel, , inspecting certificate details see it's original certificate, earlier message "at least 1 signature requires validating" changes more expected , clear message: "signed , signatures valid, unsigned changes after last signature). kind of refresh problem in adobe reader?

 

best regards

koen

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