Loong: A family of Involutional Lightweight Block Cipher Based on SPN Structure

In past few years, as security ciphers in the Internet of Things (IoT), the research of lightweight block cipher has attracted tremendous attention in cryptography. The SPN structure has been widely used in the design of block cipher. However, the encryption and decryption processes of ciphers based...

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Bibliographic Details
Published in:IEEE access 2019-01, Vol.7, p.1-1
Main Authors: Liu, Bo-Tao, Li, Lang, Wu, Rui-Xue, Xie, Ming-Ming, Li, Qiu-Ping
Format: Article
Language:English
Subjects:
Algorithms
Block cipher
Ciphers
Cryptography
Encryption
Hardware
Internet of Things
Involution
Lightweight
Lightweight cryptography
Security
Software
SPN structure
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Summary:In past few years, as security ciphers in the Internet of Things (IoT), the research of lightweight block cipher has attracted tremendous attention in cryptography. The SPN structure has been widely used in the design of block cipher. However, the encryption and decryption processes of ciphers based on the SPN structure are different. We design a new SPN structure, which is perfect for lightweight block cipher. The new SPN structure makes that the encryption process is the same as decryption. Moreover, input and output data directions are the same for encryption and decryption processes. Thus, the same process can absolutely be shared in decryption and encryption both for software and hardware implementation. Further, we propose a family of involutional lightweight block cipher, called Loong, based on the proposed SPN structure and components. Rigorous analysis indicates that Loong is of high security against cryptanalysis, especially the differential attack and linear attack. As shown by our experiments and comparisons, Loong is compact in hardware environment and is suitable for the IoT.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2940330