Formation density measurements in the presence of invasion of drilling fluids. The storage system includes first and second storage subsystems connected to each other via a path. Subsequently, the first key is regenerated by receiving a key hint from the third device, regenerating the second key using the key hint and a known message used to create the key hint, and regenerating the first key using the key seed and the regenerated second key. The multiple application fitting is versatile and in some embodiments is used with hoses that require o-rings, and in other embodiments used with hoses that do not. Also, a method of video encoding that includes selecting data for encoding in a first layer and a second layer so as to allow decoding of the data in a single combined layer, and encoding the selected data in the first layer and in the second layer by encoding a coefficient in the first layer and encoding a differential refinement to the first layer coefficient in the second layer. The fabric body has a velour surface formed at one or both of the technical back and the technical face.