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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Latest version

Release:  15.1.304
23 May 2017

Pre-release:  16.0.303
21 May 2017

SFTPBlackbox package of SecureBlackbox®

SecureBlackbox product diagram

SFTPBlackbox lets you connect to remote servers via SFTP protocol and also create your own SFTP servers (server-side components are available in VCL and .NET editions).

SFTPBlackbox includes features that help you build connection in minutes and features that let you access and control every single function, defined by the protocol specification (and sometimes even more).

SFTP (SSH File Transfer Protocol) is a secure yet simple way to access file systems, located across the network. It provides an API to create, read and write files, create, delete and enumerate directories, get and set file attributes and access control attributes. Note: SSH File Transfer Protocol is not FTPS (FTP over SSL), which is available in FTPSBlackbox package.

As the protocol is built on top of SSH connection, SFTPBlackbox includes SSHBlackbox for SSH transport. SFTPBlackbox supports strong encryption with keys up to 16384 bits.

SFTPBlackbox includes its own implementation of SSH/STP protocol family and doesn't include any external code like OpenSSL, OpenSSH etc.

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.

Read about SFTPBlackbox (.NET edition)
Read about SFTPBlackbox (VCL edition)
Read about SFTPBlackbox (Java edition)
Read about SFTPBlackbox (C++ edition)
Read about SFTPBlackbox (PHP edition)


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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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