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

CAdES, PAdES, XAdES support in SecureBlackbox

Advanced Electronic Signatures (XAdES, PAdES, CAdES) are extensions to digital signature standards, which ensure long-term validity of documents.

AdESBlackbox is a combined package, that includes all components and classes, needed to add advanced signatures to your software. This includes

  • XMLBlackbox - XMLDSig and XAdES classes and functions;
  • PDFBlackbox - PDF digital signatures and PAdES classes and functions;
  • PKIBlackbox - PKI digital signatures and CAdES classes and functions;
  • HTTPBlackbox client - classes for HTTPS transport, that let the signing engines collect revocation information using HTTPS;
  • LDAPBlackbox - classes for accessing digital certificates using LDAP protocol.

Digital signing is performed with X.509 certificates, which can be loaded from files, or which are accessible on hardware devices via PKCS#11 interface, or (on Windows) certificates stored in Windows Certificate Storage.

Supported XAdES forms are

  • XAdES-T (with timestamping)
  • XAdES-C (complete)
  • XAdES-X (extended)
  • XAdES-X-L (extended long-term)
  • XAdES-A (archive)

Supported PAdES forms are


Supported CAdES forms are

  • CAdES-C
  • CAdES-T
  • CAdES-X
  • CAdES-XL
  • CAdES-A

ASiC signatures are available in ASiCBlackbox and are not included in AdESBlackbox package.

AdESBlackbox is available for separate licensing, and also all the individual packages are included in the all-inclusive SecureBlackbox Professional.


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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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