Don’t overextend your Oblivious Transfer

Published

2023-09-20 12:00

Collected

2026-07-03 03:55

---
id: 1617
title: "Don’t overextend your Oblivious Transfer"
source_domain: blog.trailofbits.com
source_url: "https://blog.trailofbits.com/2023/09/20/dont-overextend-your-oblivious-transfer/"
published_at: "2023-09-20T12:00:53Z"
tags: ["cryptography", "vulnerability", "threshold-signatures", "oblivious-transfer", "mpc", "threshold-ecdsa"]
phying_url: "https://phying.com/item/1617"
lang: en
---

# Don’t overextend your Oblivious Transfer

## Summary

Trail of Bits found that selective abort attacks in the OT extension subprotocol can let a malicious threshold ECDSA participant recover other parties' secrets and ultimately the signing key.

## Intelligence Metadata

- **Sources:** blog.trailofbits.com
- **Published:** 2023-09-20T12:00:53Z
- **Original:** https://blog.trailofbits.com/2023/09/20/dont-overextend-your-oblivious-transfer/
- **Phying News:** https://phying.com/item/1617