Paper 2016/434 Original: eprint.iacr.org/2016/434 ↗
A Tale of Two Shares: Why Two-Share Threshold Implementation Seems Worthwhile-and Why it is Not
Abstract
In this work, we explore the possibilities for practical Threshold Implementation (TI) with only two shares in order for a smaller design that needs less randomness but is still first-order leakage resistant. We present the first two-share Threshold Implementations of two lightweight block ciphers---Simon and Present. The implementation results show that two-share TI gains in compactness while loses in throughput compared with three-share schemes. Moreover, the leakage analyses show that two-share TI retains perfect first-order resistance but is shadowed by a strong second-order leakage, making it less worthwhile.
Metadata
- Available format(s)
PDF- Category
- Implementation
- Publication info
- Preprint.
- History
- 2016-05-04: last updated
- 2016-05-04: published
- Short URL
- https://ia.cr/2016/434
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2016/434,
author = {Cong Chen and Mohammad Farmani and Thomas Eisenbarth},
title = {A Tale of Two Shares: Why Two-Share Threshold Implementation Seems Worthwhile-and Why it is Not},
howpublished = {Cryptology {ePrint} Archive, Paper 2016/434},
year = {2016},
url = {https://eprint.iacr.org/2016/434}
}