# End-to-end encryption (E2EE) solutions

Many names, one concept. End-to-end encryption, Zero-knowledge protocols and architectures, zero-trust access control and security solutions all address one thing: building systems with elevated security requirements, where only trusted agents are allowed to access the data.

The challenge of E2EE / Zero Trust solutions is the combination of security, maintainability and flexibility, which doesn't ruin UX.

## Challenges that require E2EE solutions

### Hard to control

Huge heterogeneous infrastructures with tons of components and weak perimeter in "we can't be sure what's trusted" state.

### Elevated risks

Compliance requirements or real-world risks that require minimisation of attack surface and maximisation of protection and visibility.

### Insider threats

E2EE and Zero Trust systems have defenses "outside" and "inside", protecting data from curious employees, leaving no opportunities for insiders.

## Modern end-to-end encryption solutions

### Modern crypto protocols

Zero-knowledge proof protocols allow parties to process the data together without revealing it to each other or 3rd parties. This minimises the exchange of plaintext data inside the system.

### Zero Knowledge Architectures

ZKA is a design principle that facilitates building products with no access to customer data, be it directly or via inference. ZKA can be built on top of end-to-end encryption.

### Zero Trust access control

Systems that don't have a "trust perimeter". All components are required to verify access on every transaction based on the security-relevant context of this transaction.

## Our offerings

### End-to-end encryption software

#### Acra  
##### A DATABASE SECURITY SUITE

Acra offers a selective and searchable encryption which is easy-to-integrate in already-built infrastructures. Acra can be used in E2EE / Zero Trust systems, efficiently applying encryption & other security controls to the data flow without significant alterations of the architecture.

#### Themis  
##### A CROSS PLATFORM CRYPTO LIBRARY

A security framework for end-to-end encrypted data flow. Hermes provides cryptographically protected data processing and data collaborating without the need to re-encrypt an excessive amount of data.

### Custom design and implementation

#### Zero Trust and Zero Knowledge systems

We design distributed systems, which reinforce/verify their security guarantees using End-to-End encryption, Zero-knowledge proofs or similar cryptographic approaches.

#### End-to-End Encryption layers

We design & implement End-to-End Encryption schemes with key management tailored for your use case, technical stack and UX.

#### Differential privacy systems

Various techniques from privacy-enhancing cryptography, coupled with differential privacy, are naturally suited to resolve challenges in multi-party and interactive scenarios, avoiding the sharing of data across parties.

### Consulting

#### Designing architecture for your use case

Measure twice, cut once. Before migrating to E2EE / Zero Trust, one should spend time designing new architecture, re-thinking current approaches and working on a migration guide. Our security architecture and SRE expertise can help your team.

#### Reviewing application security

Reviewing and ensuring that product, application and infrastructure security enforces the right type of security guarantees are essential for Zero Trust tooling to be efficient.

#### Product security strategy

It's tricky to correlate security matters to your product growth plan when you're aspiring for a business. Good security strategy mitigates cybersecurity risks without compromising on the usability and flexibility of your solutions.

## Relevant customer story

**End-to-end encryption for remote debugging tool**  
Data encryption and isolation in AppSpector for securing mobile development and helping digital nomads around the world.

## Business impact

### User trust

Your company doesn't have access to users' data. At the same time, the end-to-end encryption layer is integrated into app flow without breaking UX.

### Decreased cognitive load

Zero Trust, Zero Knowledge systems are hard to build, maintain and control. Our experience allows making them developers and Ops friendly.

### Simpler compliance

Controlled data flows inside strict security tools is easier to validate with auditors. Plaintext data can't be unnoticeable leaked if it's almost never in plaintext.

### Reduced risk

Zero Trust, Zero Knowledge systems radically decrease the attack surface for data and access and improve visibility.

## For innovators, by innovators

We've started Cossack Labs to develop new tools and methods for protecting the data and enabling novel solutions to emerging problems — so that at the edge of your innovation, you’ve already got fitting tools handy.