r private keys that are identified using an alias.</div>
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<td class="colFirst"><a href="../../../../../jakarta/security/auth/message/callback/PrivateKeyCallback.DigestRequest.html" title="class in jakarta.security.auth.message.callback">PrivateKeyCallback.DigestRequest</a></td>
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<div class="block">Request type for private keys that are identified using a certificate digest or thumbprint.</div>
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<td class="colFirst"><a href