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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

SSLBlackbox package of SecureBlackbox®

SecureBlackbox product diagram

With SSLBlackbox you can connect to remote SSL/TLS-secured servers or build your own servers and secure them with SSL/TLS.

SSL/TLS components support all versions of TLS (up to 1.2) with strong encryption using keys up to 16384 bits.

One of the recent additions to SSL/TLS family of protocols is Datagram TLS ( DTLS ), which is very similar to TLS. DTLS is used to protect UDP-based or other message-based network communications such as stream audio and video delivery. SSLBlackbox is one of the few solutions to provide client-side and server-side DTLS support.

SSL/TLS is often used to secure application-level protocols, such as HTTP and FTP. SSLBlackbox includes components for client-side access to the remote servers using these protocols.

In particular, SSLBlackbox includes a client-side component to upload and download files using FTP / FTPS protocol. Other operations defined by FTP protocol specifications are supported as well. Note: FTPS (FTP over SSL) is not SFTP, which is SSH File Transfer Protocol and which is available in SFTPBlackbox package.

Unlike symmetric encryption, securing communications with SSL/TLS doesn't require that the sides know the shared secret (password/encryption key). Also, the public key security (PKI) lets each side examine authenticity of the other side and prevent man-in-the-middle attacks. Another benefit of SSL/TLS is that PKI infrastructure is a widely-used technology, so implementation and maintenance of SSL/TLS-based solutions are quite simple tasks.

For certificate creation, management and validation SSLBlackbox uses PKIBlackbox, base functions of which are included with SSLBlackbox package.

SSLBlackbox includes its own implementation of SSL/TLS/DTLS 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 SSLBlackbox (.NET edition)
Read about SSLBlackbox (VCL edition)
Read about SSLBlackbox (Java edition)
Read about SSLBlackbox (C++ edition)
Read about SSLBlackbox (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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