| Subject | English | Welsh |
| comp., MS | Authority Key Identifier | amlygydd allweddol awdurdod (A certificate extension used by the certificate chaining engine to determine what certificate was used to sign a presented certificate. The AKI can contain the issuer name, serial number, public key information, or no information at all. By matching the information in a certificate's AKI extension to a CA certificate's Subject Key Identifier (SKI) extension, a certificate chain can be built) |
| comp., MS | Internet Key Exchange | Cyfnewid Allweddau Rhyngrwyd (A protocol that establishes the security association and shared keys necessary for computers to communicate by using Internet Protocol security (IPsec)) |
| comp., MS | key combination | cyfuniad bysellau (Any combination of keys that must be pressed simultaneously) |
| comp., MS | key filter | hidlydd allwedd (A metadata column or field in a Key Filters control) |
| comp., MS | Key Filters | Hidlyddion Allweddi (A metadata navigation control that enables users to limit the items displayed in a list or library to those that match selected values) |
| comp., MS | Key Management Service | Gwasanaeth Rheoli Allweddi (An optional Microsoft Exchange 2000 Server component that is installed on a designated server in an administrative group. It provides centralized administration and archival of private keys, and maintains every user s private encryption key in an encrypted database. The keys are used for encrypting e-mail messages and signing messages with digital signatures) |
| comp., MS | key sequence | dilyniant bysellau (Any combination of keys that must be pressed sequentially) |