Secure Comparator

Secure Comparator

23 Nov 2016

Themis 0.9.4 release

Glad to announce Themis 0.9.4! Minor changes for stable new version.

Themis products cryptography Python iOS Ruby Android releases PHP Themis server Secure Comparator webthemis

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27 Jul 2016

Zero Knowledge Protocols without magic

In this post, we talk about Zero-Knowledge Proofs, tie ZKP authentication to traditional security models and help you understand better how authentication, in general, should work. 

cryptography Web Secure Comparator zkp

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26 May 2016

Introducing Themis 0.9.3

Themis 0.9.3 released: new wrappers for Go, NodeJS, C++, Google Chrome and much more.

Themis products cryptography iOS Android releases Themis server Secure Comparator webthemis

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7 Apr 2016

Benchmarking Secure Comparator

This post summarizes our experiences of testing Secure Comparator as an authentication mechanism for HTTP.

While we were planning, designing and implementing Comparator, real infrastructure in which it has to function (letting Toughbase instances without shared trust to be able to exchange records and request personal data safely) was very far from being ready, but we wanted to understand how good it was for some practical applications. So we chose the obvious - seeing how SC could work as HTTP authentication mechanism.

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11 Feb 2016

Fixing Secure Comparator

After publishing Secure Comparator paper, we've received a number of concerns from the cryptographic community about possible security breach, in case, where one of the parties is intentionally falsifying the protocol. We've adressed these concerns, and, in this blog post and paper update would like to elaborate how and why. 

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Cossack Labs is a privately-held British company with a team of data security experts based in Kyiv, Ukraine.