A computer user is listening to an audio broadcast on the internet through an ssl vpn. the type of encryption cipher used in this case is:

The answer is Block cipher. A block cipher is a method of encrypting text in which a cryptographic key and algorithm are applied to a block of data at once as a group rather than to one bit at a time. They split the input text into fixed-size chunks called blocks. The operation of a block cipher is to take a block of input text and a block of key to produce a block of output text.