@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "MS_EXPOSE_REP",
      justification = "singleton pattern")
  public static DefaultCipherProvider getInstance() {
    if (instance != null) {
      return instance;
    }
    instance = new DefaultCipherProvider();
    return instance;
  }
The default cipher provider. Supports AES via the JCE.
hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/DefaultCipherProvider.java