public void cleanUp()
        {
            int nI;

            for (nI = 0; nI < PBOX_ENTRIES; nI++)
            {
                m_pbox[nI] = 0;
            }

            for (nI = 0; nI < SBOX_ENTRIES; nI++)
            {
                m_sbox1[nI] = m_sbox2[nI] = m_sbox3[nI] = m_sbox4[nI] = 0;
            }
        }
to clear data in the boxes before an instance is freed
xmppserver/src/main/java/org/jivesoftware/util/Blowfish.java