Use this dialog
box to define an optional signature handler for a document signature
or a data signature. A signature handler is a software module that implements
the public-key cryptography process and controls access to the encrypted
document or data. The Adobe.PPKLite (Adobe default security) signature
handler supports public-key encryption.
Note: Adobe.PPKLite is the only signature handler that is designed
to analyze and process the information that you enter in the Signature
Settings and Sign Data and Submit Settings dialog boxes. Third-party
signature handlers may not process this information.
To display this dialog box, perform one of the following actions:
Select a signature field, click the Signature tab in
the Object palette, click Settings, and then click Signature Handler.
Select a submit button, click the Submit tab in the Object
palette, ensure that Sign Submission is selected, click Settings,
and then click Signature Handler.
Select an email or HTTP submit button and, in the Object
palette, ensure that Sign Submission is selected, click Settings,
and then click Signature Handler.
- Name
- Lists Adobe.PPKLite as the default security handler. You
can enter the name of another third-party signature handler if needed.
- Require the signing party to use the specified signature
handler
- Forces Acrobat to use the signature handler (also known as
a filter) that is specified in the Name list box to create the digital
signature. If the signing party does not have the specified signature
handler available on their computer, Acrobat will cancel the signing
operation.
When deciding whether to require the signing party to use the
specified signature handler (which they may or may not have available),
it is helpful to understand what the signing party can and cannot
do in Acrobat and Adobe Reader, depending on the circumstances.
The following table describes the various situations that can
arise when you specify a signature handler in the Name list.
Required
|
Available to signing party
|
Behavior in Acrobat or Adobe Reader No
|
|---|
No
|
No
|
Acrobat orAdobe Reader attempts to use the
default installedsigning method, but allows the signing party to
select any otherinstalled signature handler.
|
No
|
Yes
|
Acrobat or Adobe Reader lets the signing party
use only thesignature handler specified in the Name list. The signing
partycannot use any other signature handler.
|
Yes
|
No
|
Acrobat or Adobe Reader requires the signing
party to usethe signature handler specified in the Name list. The
signing partycannot sign until they install the specified signature
handler.
|
Yes
|
Yes
|
Acrobat or Adobe Reader requires the signing
party to usethe signature handler specified in the Name list.
|
- Specify the subFilter
- Specifies the syntax of the contents of the signature dictionaryand
allows inter operability between handlers. The valid subFiltersfor digital
signatures that Acrobat recognizes are adbe.x509.rsa_sha1,adbe.pkcs7.detached,
and adbe.pkcs7.sha1.
- Require the signing party to use the specified subFilter
- Forces Acrobat or Adobe Reader to use one of the specified
subFilters.The first name in the subFilter list that matches an
encoding methodsupported by the signature handler is used as the
encoding methodfor signing. If you specify a subFilter, and the
flags propertyindicates that this entry is a required constraint,
the first matchingencoding is used when signing; otherwise, signing
will not takeplace. If the flags property indicates that this is
an optionalconstraint, the first matching encoding is used if it
is available.If it is not available, the system default encoding
is used.
When deciding whether to require the signing party to use the
specifiedsubFilter (which they may or may not have available), it
is helpfulto understand what the signing party can and cannot do
in Acrobatand Adobe Reader, depending on the circumstances.
The following table describes the various situations that can
arisewith subFilters.
Note: The Adobe.PPKLite signature handler analyzes and processes
the subFilterinformation that you enter in the Signature Settings
and the SignData and Submit Settings dialog boxes, not Acrobat.
As a result,these four situations arise only if you select the Adobe.PPKLitesignature
handler option. Third-party signature handlers may notprocess this
information.
Required
|
Available to signing party
|
Behavior in Acrobat or AdobeReader
|
|---|
No
|
No
|
The Adobe.PPKLite signature handler requires
the signing partyto use one of the subFilters specified in the subFilter
list. Ifyou specify but do not require a subFilter, the signing
party canuse another subFilter. If you specify a signature handler
other than Adobe.PPKLite it mayor may not respect this setting.
|
No
|
Yes
|
The Adobe.PPKLite signature handler lets the
signing partyuse only one of the subFilters specified in the subFilter
list.The signing party cannot use any other subFilter.If you specify
a signature handler other than Adobe.PPKLite it mayor may not respect this
setting.
|
Yes
|
No
|
The Adobe.PPKLite signature handler requires
the signingparty to use one of the subFilters specified in the subFilter
list.The signing party cannot sign until they select one of the
specifiedsubFilters. If you specify a signature handler other than Adobe.PPKLite
it mayor may not respect this setting.
|
Yes
|
Yes
|
The Adobe.PPKLite signature handler requires
the signingparty to use one of the subFilters specified in the subFilter
list.
If you specify a signature handler other than Adobe.PPKLite
it mayor may not respect this setting.
|
- Specify the Digest Method
- Specify the acceptable digest method element values. The
valid stringvalues are MD5, SHA1, SHA256, SHA384, SHA512, and RIPEMD160.
- Require the signing party to use the specified digest
method
- Forces Acrobat or Adobe Reader to use the specified digest
method.
When deciding whether to require the signing party
to use the digestmethod (which they may or may not have available),
it is helpfulto understand what the signing party can and cannot
do in Acrobatand Adobe Reader, depending on the circumstances.
The
following table describes the various situations that can arisewith
digest methods.
Note: The Adobe.PPKLite signature handler analyzes and processes
the digestmethod information that you enter in the Signature Settings
andthe Sign Data and Submit Settings dialog boxes, not Acrobat.As
a result, these four situations arise only if you select theAdobe.PPKLite
signature handler. Third-party signature handlersmay not process
this information.
Required
|
Available to signing party
|
Behavior in Acrobat or AdobeReader
|
|---|
No
|
No
|
The Adobe.PPKLite signature handler uses the
system defaultdigest method.If you specify a signature handler other
than the Adobe.PPKLitesignature handler it may or may not respect
this setting.
|
No
|
Yes
|
The Adobe.PPKLite signature handler requires
the signingparty to use one of the digest methods specified in the
Digest Methodlist. The signing party cannot use another digest method.If
you specify a signature handler other than the Adobe.PPKLitesignature
handler it may or may not respect this setting.
|
Yes
|
No
|
TheAdobe.PPKLite signature handler requires
the signing partyto use one of the digest methods specified in the
Digest Methodlist. If you specify a signature handler other than
theAdobe.PPKLite signaturehandler it may or may not respect this setting.
|
Yes
|
Yes
|
The Adobe.PPKLite signature handler requires
the signingparty to use one of the digest methods specified in the
Digest Methodlist. If you specify a signature handler other than
the Adobe.PPKLitesignature handler it may or may not respect this
setting.
|
