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/**
 * Implementation of the ECMA-376 and MS-propritary document encryptions<p>
 *
 * The implementation is split into the following packages:
 *
 * <ul>
 * <li>This package contains common functions for both current implemented cipher modes.</li>
 * <li>the {@link org.apache.poi.poifs.crypt.agile agile} package is part of the poi ooxml jar and the provides agile encryption support.</li>
 * <li>the {@link org.apache.poi.poifs.crypt.binaryrc4 binaryrc} package is used for the fixed length RC4 encryption of biff/H**F formats</li>
 * <li>the {@link org.apache.poi.poifs.crypt.cryptoapi cryptoapi} package is used for the variable length RC encryption of biff/H**F formats</li>
 * <li>the {@link org.apache.poi.poifs.crypt.standard standard} package contains classes for the standard encryption ...</li>
 * <li>the {@link org.apache.poi.poifs.crypt.xor xor} package contains classes for the xor obfuscation of biff/H**F formats</li>
 * </ul>
 *
 * @see <a href="https://poi.apache.org/encryption.html">Apache POI - Encryption support</a>
 * @see <a href="http://msdn.microsoft.com/en-us/library/dd952186(v=office.12).aspx">ECMA-376 Document Encryption</a>
 */
package org.apache.poi.poifs.crypt;