Collected research

ROBOT: Return Of Bleichenbacher's Oracle Threat

The ROBOT Attack

Hanno Böck, Juraj Somorovsky and Craig Young · robotattack.org

ROBOT revives Bleichenbacher's 1998 adaptive chosen-ciphertext attack on RSA PKCS #1 v1.5 by using new oracle signals such as timeouts, connection resets and duplicate alerts, and by truncating the TLS handshake. A vulnerable server can be used to decrypt recorded RSA-key-exchange traffic or to sign messages with its private key, as demonstrated against Facebook and PayPal.

Record

Document

The ROBOT Attack

Researcher

Hanno Böck, Juraj Somorovsky and Craig Young

Published by

robotattack.org

Topic

Other

In the archive

• Collected in the 2016–17 research round

Related sources

• ROBOT
• ROBOT at RuhrSec 2018
• ROBOT at BornHack 2018
• ROBOT at USENIX Security 2018
• ROBOT detector
• SSLyze ROBOT detection

Tags

• tls
• https
• info-leak
• cve
• vendor-advisory
• prior-art-extension
• owasp-a02-2021

This page is the archive's own catalogue record. The research is the work of Hanno Böck, Juraj Somorovsky and Craig Young, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 11 August 2026.