cryptography tag


Cossack Labs Blog

18 Nov 2015

Armoring ed25519 to meet extended security challenges

When developing new, advanced features of Themis library, we had to extend some of the ECC cryptography available in open source with our own implementation to provide simple point multiplication with random (unknown in advance) point. To achieve that, we've extended Daniel J. Bernstein's implementation of ed25519 with our own math and code. This blog post outlines our direction of thinking.

Themis cryptography Secure Comparator zkp


28 Oct 2015

Why you should avoid SSL for your next application

TL;DR: SSL is huge, inefficient, complex and may present plenty of security threats. For most platforms, it's the best we've got. For some, where it can be configured properly - it's lifesaver. For many - it's the illusion of security. Let's see what applies to your application.

applied security cryptography Web


22 Sep 2015

Notes on adding cutting edge features

Some important notes on intruducing experimental, bleeding edge features to Themis, changes in Themis build system in the regard of these features, and a tease of new things to come.

Themis cryptography Secure Comparator zkp


18 May 2015

Introducing Themis

We are proud to present Themis, a novel cryptographic services library.

Every good work of software starts by scratching a developer's personal itch. (The Cathedral and the Bazaar)

Themis products cryptography releases


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