. For example, the 
Oracle Obfuscation toolkit requires that all data to be encrypted should have a length 
which is a multiple of 8 characters. In effect, this means that the fields must be 
extended with a suitable padding character which must then be stripped off at 
decryption time. 
 
The strength of the encryption is also an issue. Some encryption is more secure than 
others. According to the experts, most encryption systems can be broken – it is just a 
matter of time and effort. In other words, not 