SecureBlackbox® is described as 'SecureBlackbox is a library (suite of components and classes) for software developers that allows them to provide secure data transfer and storage, digital signing and verification, encryption, and compression (please refer to /n software website to get the complete list of' and is an app in the Development category. There are five alternatives to SecureBlackbox® for a variety of platforms, including Windows, Linux, Mac, Haiku and iPhone. The best alternative is OpenSSH, which is both free and Open Source. Other great apps like SecureBlackbox® are OpenSSL (Free, Open Source), GnuTLS (Free, Open Source), Themis (Free, Open Source) and SecureBridge (Paid).
OpenSSH is a free version of the SSH connectivity tools that technical users rely on. OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, and other attacks.
Themis is a cryptolibrary, providing high-quality security services for secure messaging and encrypted storage. Themis is aimed at modern development practices, with wrappers for Ruby, Python, PHP, Java / Android and iOS / OSX.
SecureBridge represents clients and servers for SSH, SFTP and SSL protocols as a network security solution. It can protect any TCP network traffic using SSH or SSL secure transport layer protocols to provide authentication for client.