Availability is the property of ensuring that an asset can be used when it is needed. In other words, availability protects against the threat of denial of service. It is one of the three key security properties of an asset, along with confidentiality and integrity.
I am toying with the idea of adding keyfiles to various things that I encrypt. However what's been keeping me from adopting them is guaranteeing that I don't lose the keyfile while still keeping ...