[DirectX 6 Programmer's Reference] Security and Authentication (59.7721571906355%)

DirectX Media > DirectPlay > Using DirectPlay

[DirectX 7 Programmer's Reference] Security and Authentication (52.1156832298137%)

Microsoft DirectX 7.0 > DirectPlay > DirectPlay Essentials

[DirectX 7 Programmer's Reference] Security (35.0665688980906%)

Microsoft DirectX 7.0 > DirectPlay > DirectPlay Architecture