Soft or resilient material used to fill or give shape or protect or add comfort; SYN. cushioning.

A technique used in cryptography for simplifying the operation of encryption algorithms.
In data storage, the addition of one or more bits, usually zeros, to a block of data to fill it, to force the actual data bits into a certain position, or to prevent the data from duplicating a bit pattern that has an established meaning, such as an embedded command.