A NOVEL ARCHITECTURE FOR LIGHTWEIGHT BLOCK CIPHER, PICCOLO

Abstract

Security and privacy are going to be the key factors for the deployment of new applications, since people will only accept these deployments if these are based on secure, trustworthy and privacy-preserving infra-structures. Cryptography plays a major role in the security of data transmission and the development of computing technology imposes stronger requirements on the cryptography schemes. Lightweight cryptography is a cryptographic algorithm or protocol tailored for implementation in constrained environments including RFID tags, sensors, contactless smart cards, health-care devices and so on. These devices are leading to an ever increasing need to provide security. In order to satisfy these needs, secure and efficient encryption and authentication schemes have to be developed. Symmetric-key algorithms, especially lightweight block ciphers, play an important role to provide security in these applications. Piccolo is a new lightweight block cipher which is optimized for extremely constrained devices. Piccolo supports 64-bit block with 80 or 128-bit keys, and has an iterative structure which is a variant of a generalized Feistel network. Piccolo achieves both high security and extremely compact implementation unlike the other Feistel-type structure based lightweight block ciphers. The proposed system deals with an efficient implementation of Piccolo block cipher architecture that will fulfill mandatory requirements such as throughput and speed for low-resource devices like RFID tags and wireless sensors. The new architecture is designed such that it shares the key scheduling block for two plain text blocks concurrently.