> For the complete documentation index, see [llms.txt](https://exequantum.gitbook.io/exequantum-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://exequantum.gitbook.io/exequantum-docs/educational-material/the-algorithms-behind-pqcaas.md).

# The algorithms behind PQCaaS

The algorithms that power ExeQuantum's API

### Introduction

ExeQuantum leverages cutting-edge post-quantum cryptographic (PQC) algorithms to provide robust security solutions in an API format. Two key algorithms that form the backbone of ExeQuantum's cryptographic offerings are ML-KEM (Module Lattice Key Encapsulation Mechanism) and ML-DSA (Module Lattice Digital Signature Algorithm). These algorithms are designed to withstand quantum attacks and ensure long-term data security.

### ML-KEM: Post-Quantum Key Encapsulation

#### Overview

ML-KEM is a lattice-based key encapsulation mechanism (KEM) that enables secure key exchange between parties without vulnerability to quantum computers. It is a finalist in the NIST Post-Quantum Cryptography Standardisation Process, making it a strong candidate for widespread adoption in post-quantum security applications.

#### Features

* **Quantum-Resistant Security**: Based on structured lattice problems that are infeasible for both classical and quantum computers to solve.
* **Efficient Key Exchange**: Provides strong security while maintaining practical performance suitable for high-speed applications.
* **Scalability**: Supports integration into various encryption protocols without significant computational overhead.

#### Use Cases

* Secure communication channels
* Quantum-safe TLS handshake mechanisms
* Encrypted cloud storage

#### ML-KEM in ExeQuantum's API

ExeQuantum provides ML-KEM as an API endpoint, allowing developers to integrate post-quantum secure key exchange into their applications. The API functions include:

* **Key Generation**: Generates public-private key pairs.
* **Encapsulation**: Produces a shared secret and encapsulated key.
* **Decapsulation**: Recovers the shared secret from the encapsulated key.

### ML-DSA: Post-Quantum Digital Signatures

#### Overview

ML-DSA is a post-quantum digital signature algorithm based on module lattices. It provides quantum-resistant authentication mechanisms, ensuring data integrity and non-repudiation in digital transactions.

#### Features

* **Strong Security**: Resistant to quantum attacks, ensuring long-term validity of signed documents.
* **Low Computational Overhead**: Optimised for efficiency, making it suitable for real-world deployments.
* **Versatility**: Can be used in various digital authentication systems.

#### Use Cases

* Secure firmware updates
* Blockchain and cryptocurrency transactions
* Digital identity verification

#### ML-DSA in ExeQuantum's API

ExeQuantum offers ML-DSA as an API service, making it easy to integrate quantum-secure digital signatures into existing systems. The API functionalities include:

* **Key Generation**: Creates public-private key pairs for signing and verification.
* **Signing**: Generates secure digital signatures for messages.
* **Verification**: Validates signatures against public keys to ensure authenticity.

### Why ExeQuantum?

ExeQuantum's API-based approach allows businesses to integrate **ML-KEM** and **ML-DSA** seamlessly without needing in-depth cryptographic expertise. Our platform provides:

* **Scalability**: Ready-to-use APIs with minimal integration effort.
* **Compliance**: Alignment with emerging post-quantum security standards.
* **Performance Optimisation**: Efficient implementations designed for real-world applications.

With quantum computing on the rise, transitioning to post-quantum cryptographic solutions is essential. ExeQuantum simplifies this process by offering **ML-KEM** and **ML-DSA** as API services, ensuring businesses stay ahead of emerging security threats. By integrating these algorithms, organisations can achieve quantum-resistant encryption and authentication, securing their digital assets for the future.