SCEMA - An Efficient Encryption Algorithm for Multiple Types of Data

To secure Wireless content, as well as other types of content, a new type of block encryptor/cryptographic building block has been developed called SCEMA. SCEMA's utility lies in its ability to efficiently encrypt data of several types and sizes as is found in Wireless systems. When used as a 64-bit block cipher, it encrypts more or less efficiently than single-DES, depending upon the platform. However, it s relative efficiency increases significantly for shorter blocks of data. SCEMA effects a significant evolution over the present CMEA algorithm (Cellular Messaging Encryption Algorithm), and is believed to ve secure to at least 96 bits and probably to 128 bits strength. We first present a brief development history and then talk about SCEMA's architecture in more detail. The two currently recommended modes of use are depicted and a speech encryption application presented. The different cryptanalyses of these modes are than listed. Next, we detail SCEMS's exact architecture. In the concluding remarks, we compare SCEMA with DES.