The pythia {PRF} service

A Everspaugh, R Chaterjee, S Scott, A Juels… - 24th USENIX Security …, 2015 - usenix.org
… These services are used, for … PRF service called PYTHIA designed to offer a level of flexibility,
security, and easeof-deployability lacking in prior approaches. The keystone of PYTHIA is …

[PDF][PDF] Multi-factor password-authenticated key exchange via pythia PRF service

Z Li, J Wang, C Choi, W Zhang - Computers, Materials & …, 2020 - cdn.techscience.cn
… we leverage the Pythia PRF service to harden stored biometric hashes (or ciphertexts) and
the … In our framework, armed with the introduced the Pythia PRF service, the adversary cannot …

Phoenix: Rebirth of a Cryptographic {Password-Hardening} Service

RWF Lai, C Egger, D Schröder… - 26th USENIX Security …, 2017 - usenix.org
… As such, it is the Achilles heel of many modern systems. Facebook pioneered using
external … the first comprehensive treatment of such a service and proposed the Pythia PRF-Service

Parcae: A Blockchain-Based PRF Service for Everyone

E Wyss, D Davidson - International Conference on Digital Forensics and …, 2021 - Springer
… We find that the inherent privacy conflict between PRF services and blockchains … the Pythia
PRF service by sending a blinded password hash and an unblinded salt value to a Pythia

Efficient cryptographic password hardening services from partially oblivious commitments

J Schneider, N Fleischhacker, D Schröder… - … the 2016 ACM SIGSAC …, 2016 - dl.acm.org
… of such a service was only recently provided by Everspaugh et al. [19], who … the Pythia
PRF-Service and gave the first formal consideration to its security. The Pythia PRF-Service is …

Rethinking security in the era of cloud computing

J Aikat, A Akella, JS Chase, A Juels… - IEEE Security & …, 2017 - ieeexplore.ieee.org
… to the PRF server are cryptographically concealed from the cloud operator, yet Pythia still
enables theThe PaaS service attests to code identity for the stages of the analytics workflow: …

The Pythia PRF Service

S Scott, A Juels, T Ristenpart - usenix.org
… New direction: Complete architecture for password storage using a new cryptographic
PRF service. … PRF Construction Pythia Server Web Server …

Reliable password hardening service with opt-out

C Jia, S Wu, D Wang - 2022 41st International Symposium on …, 2022 - ieeexplore.ieee.org
… To solve this issue, we conclude all properties of the PH service in Section II. … rotations of
PRF keys in a multi-tenant scenario. Pythia [8] takes the same method, but unlike Pythia, our …

A fast and simple partially oblivious PRF, with applications

N Tyagi, S Celi, T Ristenpart, N Sullivan… - … Conference on the …, 2022 - Springer
… security for password breach alerting services. … the context of the Pythia password hardening
system [20], extend this functionality to include a public input (or metadata tag) t for the PRF

Building low-interactivity multifactor authenticated key exchange for industrial internet of things

Z Li, Z Yang, P Szalachowski… - IEEE Internet of Things …, 2020 - ieeexplore.ieee.org
… factors stored at the server exposing to attackers, the password-harden service (ie, Pythia-PRF
and USENIX’15) inspires us to develop a multifactor hardening service (MFHS) utilizing …