<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"
        p:driverClassName="oracle.jdbc.OracleDriver"
        p:url="${CONNECTION_STRING}"
        p:username="${DB_USERNAME}"
        p:password="${DB_PASSWORD}">
          <property name="connectionProperties">
              <value>
                  oracle.net.encryption_types_client: (RC4_256)
                oracle.net.encryption_client: REQUIRED
                oracle.net.crypto_checksum_types_client: (MD5)
                oracle.net.crypto_checksum_client: REQUIRED
                oracle.net.crypto_seed: 123456    
              </value>
          </property>
     </bean>