Why Sign & Encrypt operation is weaker than you might thought

The article discusses the problems that arise from using Sign & Encrypt operation carelessly or from putting too much trust into data, secured this way.

Is MacOS X really secure?

This technical article discusses in details the topic of how [in]secure MacOS X is. The article includes a number of references to flaws in design and implementation of MacOS X and can serve like a good how-to guide for those who plan attacks on MacOS X.