The present invention provides a waste disposal system through the use of a flexible bag 14 with glove members 20, 22, a removable and replaceable splash shield 17, a drain line tube 32, and a refill tube 48 in order to service aircraft lavatories. Each of the memories includes a number of addressable storage locations, and storage locations in different memories may share a common global address. Furthermore, at least one level of the multilevel transform is applied to the encrypted transform coefficients.