## Cryptology ePrint Archive: Report 2018/428

Differential Fault Analysis of Rectangle-80

Shobhit Sinha and Sandip Karmakar

Abstract: We present various differential fault attack schemes for the RECTANGLE-80 and demonstrate how initially we started from a 80-bit fault to a single word fault scheme. This was mainly due to a differential vulnerability in the S-box of RECTANGLE as a result of which the exhaustive search space for the key reduces from $2^{80}$ to $2^{32}$. We have also presented a key schedule attack that is a variant of the single fault scheme, exploiting the same vulnerability and reduces the search space to $2^{40}$. The paper concludes with the simulation results for the single word fault scheme followed by countermeasures.

Category / Keywords: secret-key cryptography / cryptanalysis fault-attack RECTANGLE single-fault key-schedule

Date: received 2 May 2018, last revised 10 May 2018

Contact author: shobhit at iiitkalyani ac in

Available format(s): PDF | BibTeX Citation

Note: The paper was submitted to Journal of Cryptographic Engineering in Jan,2018. They acknowledged the merit of the theoretical attack. However, due to no practical demonstration(except in Computer Simulations), the paper was not accepted. We are in the process of revising the paper with simulations on FPGAs.

Short URL: ia.cr/2018/428

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