Intermodal transport (or intermodal transportation) involves the use of more than one mode of transport for a journey. See: Intermodal passenger transport; Intermodal freight transport
Encryption algorithms At the heart of every encrypted application is the algorithm, the math that scrambles and unscrambles data. In a nutshell, an encryption algorithm is a function which takes a string of data bytes and returns a new dataset containing unintelligible content. The same algorithm is used to decrypt data, which means encrypted data goes in from one side and the original data comes out the other.
A stream cipher is a symmetric encryption algorithm. Stream ciphers can be designed to be exceptionally fast, much faster in fact than any block cipher (see Question 54). While block ciphers operate on large blocks of data, stream ciphers typically operate on smaller units of plaintext, usually bits.