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Paper 2009/168
A Second Pre-image Attack Against Elliptic Curve Only Hash (ECOH)
Michael A. Halcrow and Niels Ferguson
Abstract
We present a second pre-image attack on ECOH. Our attack requires $2^{143}$ time for ECOH-224 and ECOH-256, $2^{206}$ time for ECOH-384, and $2^{287}$ time for ECOH-512. The attack sets the checksum block to a fixed value and uses a collision search on the elliptic curve points.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- ECOH cryptanalysis
- Contact author(s)
- niels @ microsoft com
- History
- 2009-04-10: received
- Short URL
- https://ia.cr/2009/168
- License
-
CC BY
