Comprehensive Toolset
SecureBlackbox includes all of the components you need to implement secure data storage, transfer, protection, and much more.
SFTP
SSH
SSL
Zip
FTPS
HTTP
WebDav
LDAP
OpenPGP
MIME
PKI
Mail
Cloud
PDF
XML
Office
SAML
Any Platform
Available in five platform editions, SecureBlackbox enables development for Desktops, Servers, and Mobile Devices. Editions can be purchased individually or as part of an all-inclusive Subscription.

.NET Edition

VCL Edition

Java Edition

C++ Edition

PHP Edition
Expert Support
Support is always included. Whether you are a customer or you are evaluating a free trial, expert-backed SecureBlackbox support is at your fingertips.
Documentation: Detailed descriptions, samples, instructions, and reference documentation.
Knowledge Base: How-tos, FAQs, and technical articles.
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Online Support: Submit a ticket to the SecureBlackbox support staff.
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Forums: Discuss your questions and ideas on the SecureBlackbox forums.
Leading Brands Worldwide Use Our Software
Brought to you by 
For more than two decades, /n software has been delivering trusted developer tools for Internet Communications, Security, and E-Business. In July 2016, /n software acquired the IP related to SecureBlackbox from EldoS Corporation with the goal of creating a strongest team and product line possible that will continue to provide the API, features, compatibility, and security developers need to meet modern requirements. SecureBlackbox remains an independent product line.
Learn MoreNews & Updates
SecureBlackbox 16 Now Available
SecureBlackbox 16 is now available for download. Along with various enhancements and fixes, it includes support for new security mechanisms such as U2F, PIV cards, and X.509 Certificates. You will also find support for Embarcadero RAD Studio 10.3 Rio and improved CRL processing. [learn more]
SecureBlackbox 15.1 Now Available
SecureBlackbox 15.1 is now available for download. Along with various enhancements and fixes, it includes the reworked PKCS#11 back-end engine that allows loading of PKCS#11 drivers, which have wrong structure alignment (a common problem of Linux and macOS PKCS#11 drivers). [learn more]
/n software Acquires EldoS Corporation IP
/n software as acquired the IP of EldoS Corporation. A leading provider of tools and components for communications, security, and e-business messaging, /n software has established itself as a pillar in the developer tools space by delivering enterprise-class developer tools for over two decades. The EldoS team is truly excited to be joining such a stalwart of the developer community. [learn more]
SecureBlackbox 15 Now Available
This version updates SecureBlackbox to be compatible with the latest operating systems and technologies. Highlights include Universal Windows Platform support, enhanced Java platform support, more JSON and OAuth features, security enhancements, and support for RAD Studio 10.1 Berlin. [learn more]
"We have been using SecureBlackbox for a few months now and we are extremely happy with its quality, ease of use and with the way you treat your clients. Great company, great products."
- Farhad A.
"I'd like to complement you on your great service. I personally never experienced any company with such great support. I opened a support ticket and was amazed by the quick responses. Your technical support personnel was real helpful, answered extremely quick and professional and really seemed dedicated to solve our problem. I hope you can keep this up, this great support really makes me confident to recommend EldoS software to everyone. "
- Arjan P.
"I like the product. It is very efficient and easy to implement with my code. The code samples are great and cover most scenarios. It may become the standard client SFTP component for all projects in our department. "
- Hussein Z.
"My company develops applications in Delphi and Kylix for use over the Internet, and often with remote Linux servers. More often than not, these have to be secure connections. Using SecureBlackbox, I managed to convert my insecure application into a secure one in less than an hour (including learning time) and the one query I did have was answered comprehensively by email within three working hours."
- Peter B.
"I use SecureBlackbox SSL, HTTPS and Certificate components in a Delphi VCL client application for uploading e-commerce orders to a web server. I changed to SecureBlackbox from Indy OpenSSL components since the latter has poor quality control, uses an external library and is not at all stable. By contrast SecureBlackbox has good quality, is well supported, and above all it works perfectly."
- Andrew F.
"We have tried several weeks to get the built-in X509 support of .NET working for our solution. After this time, we now know that it is hard to handle, slow, throws unmeaning exceptions and insecurely caches all key operations on the HD.
We then purchased SecureBlackbox and we were done in three (!) days! It's simply unbelievable. Great work and we would have payed any price for SBB."
- Anonymous
"SecureBlackbox is capable of everything we require of it and more. The level of support is what you would like to have rather than that you normally get! Many thanks."
- Bill W.
"We assumed the challenge to develop a prototype of digital signature with the new electronic id-card in Spain without any knowledge about PKI solutions. Thanks to PKIBlackBox and SecureBlackbox we have got it!! There was a solution very similar in samples.... Great component, good documentation and excellent support !! My questions in forum were answered in minutes....It really makes easier development work."
- Cesar C.
"I must say that I am extremely happy that I purchased you library, largely because of the excellent support."
- David F.
"Our company develops software which requires file transfer capabilities. We purchased SecureBlackbox and use FTPS, SSH and PGP components in our.NET applications. It's a great, easy-to-use object model. We enjoy an excellent support(prompt, technical and educational)."
- Eugene C.
"As the author of 3d Traceroute I was looking for a painless working, cryptographic secure, dll free, source code available solution for Delphi to implement http with SSL and Telnet with SSH. After a little bit looking around I decided to try SecureBlackbox and was surprised about the short time I needed to implement my solution. Fast mail support, continuous maintenance, I'm very pleased with my purchase."
- Holger L.
"Our company develops software in C# and VB.NET. We had to develop a PGP compatible application that encrypts a file with sensitive information and automatically e-mails it to a specified destination on a daily basis. PGPBlackbox was very simple to use and I can see us using it a lot more in the future. The support is also great. Good work EldoS!!!"
- James K.
"Your SSH components are really easy to integrate. In couple of hours I have updated my Borland C++ builder software with Socket with few modifications. I'm fully satisfied saving many work days."
- JC C.
"Our experience with this product has been very good, specially in areas where the native Microsoft classes have not been of much help."
- Joel P.
"I integrated the Activex with software I'd previously developed, and the transition was very seamless. I was able to shift everything from telnet into SSH in a matter of hours. I like your system."
- John B.
"I am in the process of testing SecureBlackbox in a bank-related application I am building.
Although I have not purchased the product yet (I intend to), the technical support I have received has been the best I've ever had from any vendor.
Thank you, EldoS!"
- John S.
"SecureBlackbox has been awesome! Very pleased with the PGPBlackbox api. Easy to use and effective. Support is fabulous. The few questions I have had were answered promptly and with competency."
- Ryan M.
"I've been developing Kylix and Delphi applications for many years, and when my company told me to do a SSH-SFTP application with a linux-openssh server, I choose SecureBlackbox, it's the best choice I could have made.
It has quite a lot of examples, good documentation, a lot of power, and the best thing of all: Every question i did have, it was answered in about an hour or less, sometimes in five minutes! Good job, EldoS"
- Santiago C.
"Great Product and excellent support!
I highly recommend Eldos and SBB.
Keep up the good work."
- Zane L.
"We had to implement digital signing into our software for transferring tax-data. We started with little knowledge to digital signing, but with the help of the documentation, the samples and the very excellent support of EldoS we reached our goal very fast. The support team answers very fast and detailed. You notice that the support gives everything and even before you buy."
- Joerg K.