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| <div class="subTitle">org.apache.pirk.querier.wideskies.decrypt</div> |
| <h2 title="Class DecryptResponse" class="title">Class DecryptResponse</h2> |
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| <pre>public class <span class="strong">DecryptResponse</span> |
| extends java.lang.Object</pre> |
| <div class="block">Class to perform PIR decryption</div> |
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| <td class="colOne"><code><strong><a href="../../../../../../org/apache/pirk/querier/wideskies/decrypt/DecryptResponse.html#DecryptResponse(org.apache.pirk.response.wideskies.Response,%20org.apache.pirk.querier.wideskies.Querier)">DecryptResponse</a></strong>(<a href="../../../../../../org/apache/pirk/response/wideskies/Response.html" title="class in org.apache.pirk.response.wideskies">Response</a> responseInput, |
| <a href="../../../../../../org/apache/pirk/querier/wideskies/Querier.html" title="class in org.apache.pirk.querier.wideskies">Querier</a> querierInput)</code> </td> |
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| <td class="colFirst"><code>java.util.Map<java.lang.String,java.util.List<<a href="../../../../../../org/apache/pirk/schema/response/QueryResponseJSON.html" title="class in org.apache.pirk.schema.response">QueryResponseJSON</a>>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/pirk/querier/wideskies/decrypt/DecryptResponse.html#decrypt()">decrypt</a></strong>()</code> </td> |
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| <td class="colFirst"><code>java.util.Map<java.lang.String,java.util.List<<a href="../../../../../../org/apache/pirk/schema/response/QueryResponseJSON.html" title="class in org.apache.pirk.schema.response">QueryResponseJSON</a>>></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/pirk/querier/wideskies/decrypt/DecryptResponse.html#decrypt(int)">decrypt</a></strong>(int numThreads)</code> |
| <div class="block">Method to decrypt the response elements and reconstructs the data elements</div> |
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| <a name="DecryptResponse(org.apache.pirk.response.wideskies.Response, org.apache.pirk.querier.wideskies.Querier)"> |
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| <h4>DecryptResponse</h4> |
| <pre>public DecryptResponse(<a href="../../../../../../org/apache/pirk/response/wideskies/Response.html" title="class in org.apache.pirk.response.wideskies">Response</a> responseInput, |
| <a href="../../../../../../org/apache/pirk/querier/wideskies/Querier.html" title="class in org.apache.pirk.querier.wideskies">Querier</a> querierInput)</pre> |
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| <a name="decrypt()"> |
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| <h4>decrypt</h4> |
| <pre>public java.util.Map<java.lang.String,java.util.List<<a href="../../../../../../org/apache/pirk/schema/response/QueryResponseJSON.html" title="class in org.apache.pirk.schema.response">QueryResponseJSON</a>>> decrypt() |
| throws java.lang.InterruptedException, |
| <a href="../../../../../../org/apache/pirk/utils/PIRException.html" title="class in org.apache.pirk.utils">PIRException</a></pre> |
| <dl><dt><span class="strong">Throws:</span></dt> |
| <dd><code>java.lang.InterruptedException</code></dd> |
| <dd><code><a href="../../../../../../org/apache/pirk/utils/PIRException.html" title="class in org.apache.pirk.utils">PIRException</a></code></dd></dl> |
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| <h4>decrypt</h4> |
| <pre>public java.util.Map<java.lang.String,java.util.List<<a href="../../../../../../org/apache/pirk/schema/response/QueryResponseJSON.html" title="class in org.apache.pirk.schema.response">QueryResponseJSON</a>>> decrypt(int numThreads) |
| throws java.lang.InterruptedException, |
| <a href="../../../../../../org/apache/pirk/utils/PIRException.html" title="class in org.apache.pirk.utils">PIRException</a></pre> |
| <div class="block">Method to decrypt the response elements and reconstructs the data elements |
| <p> |
| Each element of response.getResponseElements() is an encrypted column vector E(Y_i) |
| <p> |
| To decrypt and recover data elements: |
| <p> |
| (1) Decrypt E(Y_i) to yield |
| <p> |
| Y_i, where Y_i = \sum_{j = 0}^{numSelectors} 2^{j*dataPartitionBitSize} D_j |
| <p> |
| such that D_j is dataPartitionBitSize-many bits of data corresponding to selector_k for j = H_k(selector_k), for some 0 <= k < numSelectors |
| <p> |
| (2) Reassemble data elements across columns where, hit r for selector_k, D^k_r, is such that |
| <p> |
| D^k_r = D^k_r,0 || D^k_r,1 || ... || D^k_r,(numPartitionsPerDataElement - 1) |
| <p> |
| where D^k_r,l = Y_{r*numPartitionsPerDataElement + l} & (2^{r*numPartitionsPerDataElement} * (2^numBitsPerDataElement - 1))</div> |
| <dl><dt><span class="strong">Throws:</span></dt> |
| <dd><code>java.lang.InterruptedException</code></dd> |
| <dd><code><a href="../../../../../../org/apache/pirk/utils/PIRException.html" title="class in org.apache.pirk.utils">PIRException</a></code></dd></dl> |
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