EldoS | Feel safer!

Software components for data protection, secure storage and transfer


Add perfect security to your application!

SecureBlackbox is a suite of software components that allows developers to add strong security to their applications to protect binary data, files, documents and e-mails.

SecureBlackbox includes authentic implementations (no 3rd-party code used) of various data security standards and network communication protocols for various platforms (Windows, .NET, Linux, macOS / iOS, Java / Android).

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It has quite a lot of examples, good documentation, a lot of power, and the best thing of all: ...

Latest version

Release:  15.1.304
23 May 2017

Pre-release:  16.0.303
21 May 2017

OfficeBlackbox package of SecureBlackbox®

With OfficeBlackbox you can extend your document processing applications with encryption and digital signing of office documents. This includes Microsoft Office (Word, Excel and Powerpoint) binary and OOXML files, OpenOffice (ODF, Open Document Format) files and OpenXPS (XPS, XML Paper Specification) files.

Supported operations include password-based encryption and decryption of files, certificate-based digital signing and signature validation of files.

OfficeBlackbox includes XMLBlackbox for XML data security and ZIPBlackbox for ZIP file processing. OpenPGPBlackbox is included to support PGP-based encryption and signing of XML data in XMLBlackbox.

Top 6 reasons to choose SecureBlackbox:


Strict observance of the standards and the most secure algorithms, used in the industry, ensures highest level of security of the offered solutions.


SecureBlackbox is an integrated suite of instruments, equally applicable for building complex security-related software solutions and for adding data protection to existing applications.

Easy to use architecture

SecureBlackbox was carefully designed by software architects, who have extensive experience in software development and design.

Readiness for use

One can use SecureBlackbox even if he/she has only basic knowledge of information security and cryptography.

Flexible support policy

EldoS offers many support options, from forums and knowlegebase to free individual support and expert services.

Affordable licensing schemes

EldoS offers affordable royalty-free licenses for all its products. All licenses include free individual support and free updates.


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As of July 15, 2016 EldoS business operates as a division of /n software, inc. For more information, please read the announcement.

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