eprint.iacr.org will be offline for approximately an hour
for routine maintenance at 11pm UTC on Tuesday, April 16. We lost some data between
April 12 and April 14, and some authors have been notified that they need to resubmit their papers.
You are looking at a specific version 20090410:211405 of this paper.
See the latest version.
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
