<div class="content"><p> </p><p>The optional SecurityHeader contains security information.</p><table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="16">
  <p>Flags</p>
  </td>
  <td colspan="16">
  <p>SenderIdSize</p>
  </td>
 </tr>
 <tr>
  <td colspan="16">
  <p>EncryptionKeySize</p>
  </td>
  <td colspan="16">
  <p>SignatureSize</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>SenderCertSize</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>ProviderInfoSize</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>SecurityData
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
</tbody></table><p><b>Flags (2 bytes): </b>A 16-bit unsigned short
integer that contains a set of options that provides additional information about
the packet. Any combination of these values is acceptable unless otherwise
noted in the following table.</p><dl>
<dd>
<table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="4">
  <p>ST</p>
  </td>
  <td>
  <p>A</p>
  </td>
  <td>
  <p>B</p>
  </td>
  <td>
  <p>C</p>
  </td>
  <td>
  <p>D</p>
  </td>
  <td colspan="4">
  <p>AS</p>
  </td>
  <td>
  <p>E</p>
  </td>
  <td>
  <p>F</p>
  </td>
  <td>
  <p>G</p>
  </td>
  <td>
  <p>H</p>
  </td>
  
 </tr>
</tbody></table>
</dd>
<dd>
<p><b>ST (4 bits): </b>Specifies
the type of sender ID in the <b>SecurityData</b> field. This field MUST be set
to one of the following values.</p>
<dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Value</p>
   </th>
   <th>
   <p>Meaning</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>0x0</p>
  </td>
  <td>
  <p>The <b>SecurityData.SecurityID</b> field is not
  present and the <b>SenderIdSize</b> field MUST be set to 0x0000.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x1</p>
  </td>
  <td>
  <p>The <b>SecurityData.SecurityID</b> field MUST contain
  the sender application security identifier (<b>SID</b>). The <b>SID</b>
  layout is specified in <span><a href="../ms-dtyp/cca27429-5689-4a16-b2b4-9325d93e4ba2" data-linktype="relative-path">[MS-DTYP]</a></span>
  section <span><a href="../ms-dtyp/f992ad60-0fe4-4b87-9fed-beb478836861" data-linktype="relative-path">2.4.2.2</a></span>.
  The <b>SubAuthority</b> field of the <b>SID</b> packet is a variable-length
  array of unsigned 32-bit <span><a href="87486cd1-6ef0-4b58-93f9-f9b97b2279c4#gt_079478cb-f4c5-4ce5-b72b-2144da5d2ce7" data-linktype="relative-path">little-endian</a></span>
  integers.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x2</p>
  </td>
  <td>
  <p>The <b>SecurityData.SecurityID</b> field MUST contain
  the <span><a href="87486cd1-6ef0-4b58-93f9-f9b97b2279c4#gt_476f10ed-08f0-4887-b583-59d5cf909979" data-linktype="relative-path">queue manager</a></span> <b>GUID</b>.</p>
  </td>
 </tr></tbody></table>
</dd></dl></dd>
<dd>
<p><b>A - AU (1 bit): </b>Indicates
whether the <span><a href="87486cd1-6ef0-4b58-93f9-f9b97b2279c4#gt_85c78cf0-1fb6-4e5d-85f5-a2e9f58a6b9e" data-linktype="relative-path">message</a></span> is
authenticated. This field MUST be set to 0.</p>
</dd>
<dd>
<p><b>B - EB (1 bit): </b>Indicates
whether the body of the message is encrypted. If set, the <b>MessagePropertiesHeader.MessageBody</b>
field MUST be encrypted by the sender and decrypted by the receiver.</p>
<dl>
<dd>
<p>For details about encryption on the
sender side, see <span><a href="../ms-mqqb/85498b96-f2c8-43b3-a108-c9d6269dc4af" data-linktype="relative-path">[MS-MQQB]</a></span>
section <span><a href="../ms-mqqb/3a2181af-09b3-44f4-8944-4850d8c91c9d" data-linktype="relative-path">3.1.7.1.5</a></span>.</p>
</dd>
<dd>
<p>For details about decryption on the
receiver side, see [MS-MQQB] section <span><a href="../ms-mqqb/520596ed-83c4-4193-af07-d178b10dcfe0" data-linktype="relative-path">3.1.5.8.3</a></span>.</p>
</dd></dl></dd>
<dd>
<p><b>C - DE (1 bit): </b>Indicates
whether the default cryptographic provider is used.<a id="Appendix_A_Target_19"></a><a aria-label="Product behavior note 19" href="96cd5098-ad7f-43ce-a27c-dcafc367f364#Appendix_A_19" data-linktype="relative-path">&lt;19&gt;</a> When clear and <b>SignatureSize</b>
is nonzero, the <b>SecurityData.ProviderName</b> MUST specify the name of the
alternate provider.</p>
</dd>
<dd>
<p><b>D - AI (1 bit): </b>Indicates
whether the <b>SecurityData</b> field is present. If set, the header MUST
include a <b>SecurityData</b> field.</p>
</dd>
<dd>
<p><b>AS (4 bits): </b>Indicates
the authentication signature type. This field MUST be set to 0.</p>
</dd>
<dd>
<p><b>E - X12 (1 bit): </b>Unused
bit field. This field SHOULD NOT be set when sent and MUST be ignored on
receipt.</p>
</dd>
<dd>
<p><b>F - X13 (1 bit): </b>Unused
bit field. This field SHOULD NOT be set when sent and MUST be ignored on
receipt.</p>
</dd>
<dd>
<p><b>G - X14 (1 bit): </b>Unused
bit field. This field SHOULD NOT be set when sent and MUST be ignored on
receipt.</p>
</dd>
<dd>
<p><b>H - X15 (1 bit): </b>Unused
bit field. This field SHOULD NOT be set when sent and MUST be ignored on
receipt.</p>
</dd></dl><p><b>SenderIdSize (2 bytes): </b>A 16-bit unsigned
integer that specifies the size of the <b>SecurityData.SecurityID</b> field.
This value MUST be set to the size, in bytes, of the security identifier in the
<b>SecurityData.SecurityID</b> field. This field has a valid range from 0x0000
to 0xFFFF, inclusive.</p><p><b>EncryptionKeySize (2 bytes): </b>A 16-bit unsigned
integer that specifies the size of the <b>SecurityData.EncryptionKey</b> field.
This value MUST be set to the size, in bytes, of the encryption key in the <b>SecurityData.EncryptionKey</b>
field. This field has a valid range from 0x0000 to 0xFFFF, inclusive.</p><p><b>SignatureSize (2 bytes): </b>A 16-bit unsigned
integer that specifies the size of the <b>SecurityData.Signature</b> field.
This value MUST be set to the size, in bytes, of the sender signature in the <b>SecurityData.Signature</b>
field. This field has a valid range from 0x0000 to 0xFFFF, inclusive.</p><p><b>SenderCertSize (4 bytes): </b>A 32-bit unsigned
integer that specifies the size of the <b>SecurityData.SenderCert</b> field.
This value MUST be set to the size, in bytes, of the sender signature in the <b>SecurityData.SenderCert</b>
field. This field has a valid range from 0x00000000 to a value 0x0000FFFF,
inclusive.</p><p><b>ProviderInfoSize (4 bytes): </b>A 32-bit unsigned
integer that specifies the size of the <b>SecurityData.ProviderInfo</b> field.
This value MUST be set to the size, in bytes, of the security provider
information in the <b>SecurityData.ProviderInfo</b> field. This field has a
valid range between 0x00000000 and the size limit imposed by the value of <b>BaseHeader.PacketSize</b>.</p><dl>
<dd>
<p>At least one of the fields SenderIdSize, EncryptionKeySize,
SignatureSize, SenderCertSize, and ProviderInfoSize MUST be nonzero.</p>
</dd></dl><p><b>SecurityData (variable): </b>An optional
variable-length array of bytes containing additional security information. This
field MUST contain the security information specified in the <b>Flags</b>
field.</p><dl>
<dd>
<p>The data appears in the order specified below. Each
field MUST be aligned up to the next 4-byte boundary. The size of each field is
specified by the corresponding <b>SenderIdSize</b>, <b>EncryptionKeySize</b>, <b>SignatureSize</b>,
<b>SenderCertSize</b>, and <b>ProviderInfoSize</b> fields. An item with a size
of zero occupies no space in the <b>SecurityData</b> array. </p>
</dd>
<dd>
<table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="32">
  <p>SecurityID
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>EncryptionKey
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>Signature
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>SenderCert
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>ProviderInfo
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
</tbody></table>
</dd>
<dd>
<p><b>SecurityID (variable): </b>Contains
the sender <span><a href="../ms-dtyp/78eb9013-1c3a-4970-ad1f-2b1dad588a25" data-linktype="relative-path">SID</a></span>
or the sending queue manager <span><a href="../ms-dtyp/001eec5a-7f8b-4293-9e21-ca349392db40" data-linktype="relative-path">GUID</a></span>.
This field MUST be set to the queue manager <b>GUID</b> when the packet is sent
and signed by the queue manager.</p>
</dd>
<dd>
<p><b>EncryptionKey (variable):
</b>Sender symmetrical encryption key.</p>
</dd>
<dd>
<p><b>Signature (variable): </b>The
packet digital signature. The type of signature is specified by the MSMQ
version as described in the following table and the hash algorithm is specified
by the <b>MessagePropertiesHeader.HashAlgorithm</b> field.</p>
<dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>MSMQ Version</p>
   </th>
   <th>
   <p>Signature Type</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>MSMQ 1.0</p>
  </td>
  <td>
  <p>The <b>SecurityData.Signature</b> field is an <span><a href="87486cd1-6ef0-4b58-93f9-f9b97b2279c4#gt_cf9a8e0f-8060-464b-a673-fe4f815d3d8a" data-linktype="relative-path">MSMQ
  1.0 digital signature</a></span>. If the <b>SecurityData.Flags.ST</b> field
  is set to 1, the <b>SecurityData.SecurityID</b> field MUST contain the sender
  application security identifier.</p>
  <p>If the <b>SecurityData.Flags.ST</b> field is set to 2,
  it specifies that the message is signed with Sender ID as the <b>Signature</b>.
  If set, the <b>SecurityData.SecurityID</b> field MUST contain the queue
  manager <span><a href="87486cd1-6ef0-4b58-93f9-f9b97b2279c4#gt_f49694cc-c350-462d-ab8e-816f0103c6c1" data-linktype="relative-path">GUID</a></span>.</p>
  <p>The signature MUST be a hash of the MSMQ 1.0 Digital
  Signature Properties (section <span><a href="7f314bac-9633-4b9f-bb44-97c9f08b7ac9" data-linktype="relative-path">2.5.1)</a></span>.</p>
  </td>
 </tr><tr>
  <td>
  <p>MSMQ 2.0</p>
  </td>
  <td>
  <p>The <b>SecurityData.Signature</b> field is an <span><a href="87486cd1-6ef0-4b58-93f9-f9b97b2279c4#gt_46782277-690b-4a09-ad6d-8c36b11e51cd" data-linktype="relative-path">MSMQ
  2.0 digital signature</a></span>. The signature MUST be a hash of the MSMQ
  2.0 Digital Signature Properties (section <span><a href="b2b71e89-d3e5-48a2-a7d6-f70c2e4c33a0" data-linktype="relative-path">2.5.2)</a></span>.</p>
  </td>
 </tr><tr>
  <td>
  <p>MSMQ 3.0, MSMQ 4.0, MSMQ 5.0, or MSMQ 6.0</p>
  </td>
  <td>
  <p>The <b>SecurityData.Signature</b> field is an <span><a href="87486cd1-6ef0-4b58-93f9-f9b97b2279c4#gt_8d9cdb58-020b-4a32-8800-473577a27cd0" data-linktype="relative-path">MSMQ
  3.0 digital signature</a></span>. The signature MUST be a hash of the MSMQ
  3.0 Digital Signature Properties (section <span><a href="9c671883-c495-4af4-811a-2ad26346049f" data-linktype="relative-path">2.5.3)</a></span>.</p>
  </td>
 </tr></tbody></table>
</dd>
<dd>
<p>The hash algorithm that is used to
compute the <b>SecurityData.Signature</b> field is specified by the <b>MessagePropertiesHeader.HashAlgorithm</b>
field.</p>
</dd>
<dd>
<p>For details about signature and
hash computations on the sender side, see [MS-MQQB] section <span><a href="../ms-mqqb/e2355e65-7f56-49f1-9d2b-97a348f9e355" data-linktype="relative-path">3.1.7.1.4</a></span>.</p>
</dd>
<dd>
<p>For details about authentication on
the receiver side, see [MS-MQQB] section 3.1.5.8.3.</p>
</dd></dl></dd>
<dd>
<p><b>SenderCert (variable): </b>Sender
X.509 digital certificate. Details are as specified in <span><a href="https://go.microsoft.com/fwlink/?LinkId=90414" data-linktype="external">[RFC3280]</a></span>.
The public key that is contained in the certificate has the following
structure.</p>
<dl>
<dd>
<table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="8">
  <p>0x06</p>
  </td>
  <td colspan="8">
  <p>0x02</p>
  </td>
  <td colspan="8">
  <p>0x00</p>
  </td>
  <td colspan="8">
  <p>Key
  Type</p>
  </td>
 </tr>
 <tr>
  <td colspan="24">
  <p>...</p>
  </td>
  <td colspan="8">
  <p>0x52</p>
  </td>
 </tr>
 <tr>
  <td colspan="8">
  <p>0x53</p>
  </td>
  <td colspan="8">
  <p>0x41</p>
  </td>
  <td colspan="8">
  <p>0x31</p>
  </td>
  <td colspan="8">
  <p>Length
  in bits</p>
  </td>
 </tr>
 <tr>
  <td colspan="24">
  <p>...</p>
  </td>
  <td colspan="8">
  <p>Public
  Exponent</p>
  </td>
 </tr>
 <tr>
  <td colspan="24">
  <p>...</p>
  </td>
  <td colspan="8">
  <p>Modulus
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
</tbody></table>
</dd>
<dd>
<p><b>Key Type (4 bytes): </b>This
MUST be set to 0x00002400 for RSA signing keys and 0x0000A400 for RSA
encryption keys.</p>
</dd>
<dd>
<p><b>Length in bits (4
bytes): </b>This 32-bit unsigned number MUST be the length of the RSA modulus.
It MUST contain the length, in bits, of the Modulus field.</p>
</dd>
<dd>
<p><b>Public Exponent (4
bytes): </b>This MUST be a 32-bit unsigned integer. It MUST be the public
exponent of the RSA key pair, referred to as e in <span><a href="https://go.microsoft.com/fwlink/?linkid=2164409" data-linktype="external">[RFC8017]</a></span>
section 2.</p>
</dd>
<dd>
<p><b>Modulus (variable): </b>This
MUST be the RSA modulus, referred to as defined in [RFC8017] section 2. This
field MUST be a multiple of 8 bits in length and MUST append padding bits
needed to ensure this requirement. Padding bits MUST be set to zero. The public
key SHOULD<a id="Appendix_A_Target_20"></a><a aria-label="Product behavior note 20" href="96cd5098-ad7f-43ce-a27c-dcafc367f364#Appendix_A_20" data-linktype="relative-path">&lt;20&gt;</a> be stored in the directory.</p>
</dd></dl></dd></dl><p><b>ProviderInfo (variable): </b>Contains the
information of the alternative provider used to produce the signature.<a id="Appendix_A_Target_21"></a><a aria-label="Product behavior note 21" href="96cd5098-ad7f-43ce-a27c-dcafc367f364#Appendix_A_21" data-linktype="relative-path">&lt;21&gt;</a> If the Flags.DE bit is clear
and the <b>ProviderInfoSize</b> is nonzero, this field MUST be set; otherwise it
MUST NOT be included in the <b>SecurityData</b> field. The layout of this field
is as follows.<a id="Appendix_A_Target_22"></a><a aria-label="Product behavior note 22" href="96cd5098-ad7f-43ce-a27c-dcafc367f364#Appendix_A_22" data-linktype="relative-path">&lt;22&gt;</a></p><dl>
<dd>
<table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="32">
  <p>ProviderType</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>ProviderName
  (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
</tbody></table>
</dd>
<dd>
<p><b>ProviderType (4 bytes): </b>A
32-bit unsigned integer that indicates the type of the alternative provider
used to produce the signature.</p>
</dd>
<dd>
<p><b>ProviderName (variable): </b>A
null-terminated <span><a href="87486cd1-6ef0-4b58-93f9-f9b97b2279c4#gt_c305d0ab-8b94-461a-bd76-13b40cb8c4d8" data-linktype="relative-path">Unicode</a></span> string that
contains the name of the alternative provider used to produce the signature.</p>
</dd></dl></div>