SecureBlackbox 16: Does SecureBlackbox use any third-party cryptography libraries?

No.

In the .NET edition, SecureBlackbox is compiled to pure managed code and all encryption, hashing, and compression algorithms are implemented internally.

In the VCL and ActiveX editions, SecureBlackbox uses only native Delphi code, and all encryption, hashing, and compression algorithms are implemented in Delphi.

The only case when CryptoAPI is used is for access to system certificate storages. Also, you can plug PKCS#11 drivers to access cryptocards and USB cryptotokens.