Ana Sayfa Keşfet Yardım
Giriş Yap
ckomlo
/
VerifiableSecretSharing
1
0
Çatalla 0
Dosyalar Sorunlar 0 Değişiklik İstekleri 0 Wiki

Improvements to Shamir Secret Sharing to verify the integrity of shares issued by a central dealer.

Ağaç: 63c2b071e8
Dallar Biçim İmleri
VerifiableSe...
ZIP TAR.GZ
Chelsea H. Komlo 63c2b071e8 add instructions for how to import and further detail on project 5 yıl önce
src a2244c3740 remove prints during testing 5 yıl önce
.gitignore 86643c7c22 Initial commit of empty cargo 5 yıl önce
Cargo.toml 921ec26068 Sharing 5 yıl önce
LICENCE 414832876d add 3-Clause BSD License 5 yıl önce
README.md 63c2b071e8 add instructions for how to import and further detail on project 5 yıl önce

README.md

Verifiable Secret Sharing for Shamir Threshold Scheme

This implementation was part of the contribution for the following paper:

Bailey Kacsmar, Chelsea Komlo, Florian Kerschbaum, Ian Goldberg. "Mind the Gap: Ceremonies for Applied Secret Sharing." Proceedings on Privacy Enhancing Technologies. Vol. 2020, No. 2. 18 pages. April 2020.

This library presents a subset of the presented improvements to Shamir's threshold scheme presented in this paper. As such, this library provides the ability for participants to verify the integrity of shares received by a central dealer, and for participants to update shares in the future, providing protection against an adversary who can collect a threshold number of shares across update epochs, but not within a single epoch.

Use

Note that this library does not provide support for serialization and deserialization of shares in order to securely transmit and store shares after they have been generated. Furthermore, the caller of generate_shares will need to account for securely deleting shares once they have been properly transmitted to participants.

Furthermore, this library does not account for how participants should handle the case when a share or update is not valid.

To import this library into an existing Rust project, add the following to the dependencies in your project's Cargo.toml

vss = "0.1.0"

This project does not provide an FFI for integration into non-Rust projects.

Additional Improvements

Note that although the paper discusses additional improvements to Shamir's Threshold Scheme, we did not include all improvements in this library due the variance in implrementation requirements. For examle, when operating in Extended Mode, the integrity value can be distributed along with shares in order to allow for validating the secret document upon recovery. However, as platform and security requirements can change how documents are encrypted, we opted to not include improvements for the Extended mode of operation in this library; see the paper (Figure 5 specifically) for more details.