Broadbent develops quantum-information and cryptographic protocols, including a method for delegating a quantum computation while keeping the client's data and computation private under the protocol's model.
University of OttawaarXivUniversal blind quantum computation addresses a practical trust problem: a client may need a remote quantum server without revealing the calculation. Broadbent's joint work with Joseph Fitzsimons and Elham Kashefi gave a universal protocol using limited client-side quantum preparation, interactive classical instructions and optional authentication. This record credits that precise coauthored result rather than treating privacy as automatic for every cloud implementation.
University of OttawaarXivDefining contributions
Work, in context- 2008
Universal blind quantum computation
Broadbent, Joseph Fitzsimons and Elham Kashefi presented a protocol in which a client can delegate a quantum computation while keeping the client's inputs, outputs and computation private. The client prepares single qubits from a finite set and uses classical interaction to direct the server; the paper also describes authentication and fault-tolerant extensions.
Joint theoretical work by Anne Broadbent, Joseph Fitzsimons and Elham Kashefi; the privacy and authentication statements apply within the paper's protocol and assumptions.
Source-supported recordarXiv
Keep in perspective
The protocol's privacy and security guarantees depend on its stated threat model and implementation assumptions; this profile does not claim that every delegated quantum service is blind or authenticated.
The evidence map
Person → documented contribution → supporting source. Select a contribution to inspect what the evidence establishes.
Universal blind quantum computation
Universal blind quantum computation
Supports: Authorship, protocol design, client capabilities, privacy scope, authentication and fault-tolerant extensions; date is the first preprint submission.
Published Jul 25, 2008 · Checked Sep 20, 2026Credit & limits: Joint theoretical work by Anne Broadbent, Joseph Fitzsimons and Elham Kashefi; the privacy and authentication statements apply within the paper's protocol and assumptions.
Read the full contribution| Contribution | Evidence & what it supports | Credit & limits |
|---|---|---|
| Universal blind quantum computation2008 | Primary paperUniversal blind quantum computation Authorship, protocol design, client capabilities, privacy scope, authentication and fault-tolerant extensions; date is the first preprint submission. Published 2008-07-25 · Checked 2026-09-20 | Joint theoretical work by Anne Broadbent, Joseph Fitzsimons and Elham Kashefi; the privacy and authentication statements apply within the paper's protocol and assumptions. |
Follow the evidence
2 sourcesPrimary papers, institutional records and attributed announcements. Each source supports the claims linked above.
- University of OttawaInstitutional record
Anne Broadbent
Current full-professor role, Tier 1 Canada Research Chair title, department and stated research interests in quantum information science and cryptography.
Checked 2026-09-20 - arXivPrimary paper
Universal blind quantum computation
Authorship, protocol design, client capabilities, privacy scope, authentication and fault-tolerant extensions; date is the first preprint submission.
Published 2008-07-25 · Checked 2026-09-20