The cryptlib Security Software Development Toolkit

Latest release available now, complete with documentation. The only security software toolkit you’ll ever need.

Decentralized Network

Highly portable encryption

Any Hardware, any Operating System

cryptlib’s highly portable nature means that it’s been employed in a wide range of embedded systems and SCADA environments.

At the highest level, cryptlib provides implementations of complete security services such as S/MIME and PGP/OpenPGP secure enveloping, SSL, TLS and SSH secure sessions, and other security operations such as secure timestamping (TSP). In addition cryptlib implements a full range of certificate authority (CA) functions, as well as providing complete CMP, SCEP, RTCS, and OCSP server implementations to handle online certificate enrolment/issue/revocation and certificate status checking.


Cyber Threats increase in Sophistication & Intensity

Business owners and managers often overlook the considerable cost, time and complexity involved in completing security projects successfully in-house. They over-estimate the ability of their technical staff to execute the security component in a very specialised and crucial part of their application or product. Internal security costs incurred are damaging to the business, as they also prevent the developer from working on productive tasks more suited to their skill set.

cryptlib developers access a series of ‘layered’ security services according to their needs and capabilities.

cryptlib Security Software Development Toolkit

World-class Security

cryptlib allows developers to quickly and easily add world-class security services to their applications and products. » Digital Security info….

Developer Friendly

Unlike many other security development software toolkits, cryptlib has been designed to minimise the effort required to add security services to your application or product. » Application Security…

Proven Track Record

cryptlib’s reliability and efficiency has been proven through widespread use for over two decades across a wide range of sectors. » cryptlib Users…

Any Hardware or OS

cryptlib supports a wide range of hardware platforms and most general-purpose, embedded, and RTOS kernels. » Hardware & OS Platforms…

Cost Effective & Efficient

cryptlib cuts development costs and time-to-market. Developers only need to learn a single API to master SSH, SSL, TLS, S/MIME, PGP, & PKI security services. » Cost-effective pricing…

Any Embedded Systems

Not dependent on dynamic memory allocation, networking, or filesystem I/O, runs on a wide range of embedded & RTOS environments. » Embedded Systems…

How it works

It’s easy to get started

cryptlib is available for free download and evaluation at any time. There is no charge for development seats, only for a commercial deployment of the software.


Download the latest cryptlib software, complete with full technical documentation.


Install and evaluate in your development project.

License & Deploy

Buy a software license and deploy in your live environment.

Why Choose cryptlib?

The cryptlib Security Software Development Toolkit allows even inexperienced developers to easily add world-class security services to their applications by learning a single API. cryptlib manages all your SSL, SSH, TLS, S/MIME, PGP, OpenPGP, PKI, X.509, CMP, OCSP and SCEP security requirements, and more. cryptlib was designed by security experts, but not exclusively for security experts. It is highly efficient and has been rigorously tested across a wide range of operating systems and platforms over the last 25 years. The cryptlib software has been deployed and proven in many different sectors, and our clients state that it is the only security software development toolkit you’ll ever need.

cryptlib Security Software Development Toolkit

Last Updated on Monday, November 27, 2023 by Shayne Jones

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cryptlib allows developers to quickly add world-class security services to their software applications.

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