> А зачем ключи в ядре хранить?This option provides support for retaining authentication tokens and access keys in the kernel.
It also includes provision of methods by which such keys might be associated with a process so that network filesystems, encryption support and the like can find them.
Furthermore, a special type of key is available that acts as keyring: a searchable sequence of keys. Each process is equipped with access to five standard keyrings: UID-specific, GID-specific, session, process and thread.
Короче, если ты о них не знаешь, то это еще не значит, что ты (точнее твой ящик) их не используешь! :)