Linux Gazette carries a regular column called Layer 8 Linux Security.
Transport Layer Security | Layer Marney | Simple Authentication and Security Layer | Ozone layer | Ozone Layer | MPEG-1 Audio Layer II | ATM Adaptation Layer 5 | Thin layer chromatography | Sattler's layer | Quartz (graphics layer) | Physics Abstraction Layer | ozone layer | Ontology Inference Layer | Layer Pyramid | Germ layer | Fighting Layer | abstraction layer |