Publication details
A short basis of the Stickelberger ideal of a cyclotomic field
| Authors | |
|---|---|
| Year of publication | 2024 |
| Type | Article in Periodical |
| Magazine / Source | Mathematics of Computation |
| MU Faculty or unit | |
| Citation | |
| Web | https://doi.org/10.1090/mcom/3863 |
| Doi | http://dx.doi.org/10.1090/mcom/3863 |
| Keywords | Cyclotomic fields; Stickelberger ideal; short basis; relative class number |
| Attached files | |
| Description | We exhibit an explicit short basis of the Stickelberger ideal of cyclotomic fields of any conductor, i.e., a basis containing only short elements. An element of the group ring Z[G], where G is the Galois group of the field, is said to be short if all of its coefficients in basis G are 0 or 1. As a direct practical consequence, we deduce from this short basis an explicit upper bound on the relative class number that is valid for any conductor. This basis also has several concrete applications, in particular for the cryptanalysis of the Shortest Vector Problem on Ideal Lattices. |