Paper 2012/233
A Cryptanalysis of HummingBird-2: The Differential Sequence Analysis
Qi Chai and Guang Gong
Abstract
Hummingbird-2 is one recent design of lightweight block ciphers targeting constraint devices, which not only enables a compact hardware implementation and ultra-low power consumption but also meets the stringent response time as specified in ISO18000-6C.
In this paper, we present the first cryptanalytic result on the full version of this cipher using two pairs of related keys, i.e., four keys. We discover that the differential sequences for the last invocation of the round function can be computed by running the full cipher, due to which the search space for the key can be reduced. Base upon this observation, we propose a probabilistic attack encompassing two phases, preparation phase and key recovery phase. The preparation phase, requiring
Metadata
- Available format(s)
-
PDF
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- lightweight cryptographydifferential cryptanalysisHummingbird encryption
- Contact author(s)
- raullenchai @ gmail com
- History
- 2012-05-14: last of 3 revisions
- 2012-04-30: received
- See all versions
- Short URL
- https://ia.cr/2012/233
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2012/233, author = {Qi Chai and Guang Gong}, title = {A Cryptanalysis of {HummingBird}-2: The Differential Sequence Analysis}, howpublished = {Cryptology {ePrint} Archive, Paper 2012/233}, year = {2012}, url = {https://eprint.iacr.org/2012/233} }