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

SSLBlackbox main features

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image  SSL/TLS Protocol implementation contains the following features, common to both client-side and server-side components:

  • widest possible compatibility via support for modern TLS 1.2, TLS 1.1, TLS 1.0, still used SSL 3 and historical SSL 2;
  • DTLS (Datagram TLS) protocol support lets you secure your UDP-based communications;
  • flexible client- and server-side SSL/TLS authentication support during handshake allows deploying the classes to custom PKI infrastructure;
  • user-controlled validation of certificates lets you build custom PKI infrastructure or better control authentication in SSL/TLS;
  • built-in compression increases transfer speed and reduces network load;
  • optional resuming of TLS sessions in both client and server components. Both SSL sessions and TLS Stateless resumption are supported;
  • use of Cryptocards and USB Crypto Tokens for further protection of secret information (private and secret keys);
  • authentication using OpenPGP keys and pre-shared keys (PSK) provides an alternative to PKI for in-house solutions;
  • SRP (Secure Remote Password) cipher suites is another alternative to PKI for authentication;
  • standard and custom TLS extensions let you harness the power of TLS specification and include additional information to the handshake, if necessary;
  • with raw asymmetric keys for authentication (instead of X.509 certificates) you can avoid the necessity to deploy PKI infrastructure where it is not needed (in closed environments) and decrease handshake time;
  • possibility to secure any data channels (and not just TCP or UDP sockets) lets you secure any communication channel with TLS or DTLS;
  • OCSP stapling support lets you reduce load on certificate authorities' OCSP servers during certificate validation;
  • certificates with key length from 512 to 16384 bits give you enough security for today and tomorrow solutions;
  • support for RSA, DSA and DH public key algorithms and optional ECC-based cipher suites;
  • data encryption with Camellia, AES (128 to 256 bit), Triple DES (3DES), DES, ARCFOUR, RC2 algorithms;
  • asynchronous operation mode lets you easily build synchronous and asynchronous applications.
All features are supported by both client and server classes.

image  ElSimpleSSLClient is a client socket-based component, which encapsulates a socket and an SSL client inside and offers handy and easy to use interface for communication with remote server. It has the following features:

image  Client-side FTP / FTPS protocol implementation offers the following FTP and FTPS features:

image  HTTPBlackbox includes a client-side HTTP / HTTPS protocol implementation, which offers the following HTTP features:

  • HTTP 1.0 and HTTP 1.1 functionality including keep-alive requests, chunked encoding and compression (the features required by HTTP 1.1);
  • client-side HTTP over SSL (HTTPS);
  • REST client component;
  • WebSocket (RFC 6455) client implementation that lets you connect to WebSockets server;
  • custom commands support for easy implementation of various REST APIs;
  • easy to use and flexible cookie management via cookie manager class or via events handled by your application;
  • support for files over 4 Gb;
  • HTTP, SOCKS and HTTP CONNECT (web tunneling) proxies support to ensure maximum connectivity;
  • handling of "Windows Integrated" or NTLM authentication on both destination servers and proxy servers for internal company applications;
  • flexible redirection handling lets you avoid incorrect redirection configuration the server side;
  • easy to use data post capabilities with methods to post web forms and binary data streams;
  • flexible support for client- and server-side SSL/TLS authentication during data exchange allows deploying the classes to custom PKI infrastructure;
  • built-in TCP socket;
  • possibility to use application-provided low-level transport allows to perform communication over any carrier and not just TCP socket;
  • bandwidth control to avoid overloading of slow networks;
  • IPv6 and International Domain Names (IDN) support for maximum network connectivity;
  • support for custom DNS servers and DNSSEC for even more security and network stability;
  • port knocking support for advanced security

image  PKI Infrastructure - besides SSL/TLS features, SSLBlackbox includes base functions of PKIBlackbox.

Miss a feature? Tell us about your idea using Wish List.


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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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