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Kanji: A graphic character set consisting of symbols used in Japanese ideographic alphabets. Each character is represented by 2 bytes.
Katakana: A Japanese phonetic syllabary used primarily for foreign names and place names and words of foreign origin. See also Hiragana, Kanji.
Kbps: Kilobits per second.
KDC: See key distribution center.
keepalive: Pertaining to the amount of time that elapses before a message is sent to verify a connection.
Kerberos: A network authentication protocol that is designed to provide strong authentication for client/server applications by using secret-key cryptography.; A network authentication protocol that is based on symmetric key cryptography. Kerberos assigns a unique key, called a ticket, to each user who logs on to the network. The ticket is embedded in messages that are sent over the network. The receiver of a message uses the ticket to authenticate the sender.
kernel: In OSI, a session-layer functional unit that supports the basic session services required to establish connections, transfer normal data, and release connections.
kernel thread: A one-to-one mapping between program threads and process threads where each thread is assigned to a machine task.
key: A cryptographic mathematical value that is used to digitally sign, verify, encrypt, or decrypt a message. See also private key, public key.; A column or an ordered collection of columns that is identified in the description of a table, index, or referential constraint. The same column can be part of more than one key.
keyboard profile: In System i® Access, a file that defines the way characters and functions are mapped to keys on the keyboard when the personal computer is emulating a host session.
keyboard shift: In DDS, a characteristic that can be specified for a field in a display file that automatically shifts the display station keyboard to control what the display station user can enter into the field. In IDDU and DDS, the keyboard shift can also be specified in database files, but only applies when these fields are referred to in a display file.
keyboard shortcut: A key or combination of keys that a user can press to perform an action that is available from a menu.
keyboard style: In System i Access, the keyboard key assignments that are changed to match a particular keyboard type or user-defined arrangement.
keyboard type: The physical key arrangement and assignments for the keyboard shipped from the factory.
key class: In EJB, a class that is used to create or find an entity bean. It represents the identity of the entity bean, corresponding to the primary-key columns of a row in a relational database.
key database file: See also keystore file. See key ring.
key distribution center (KDC): A network service that provides tickets and temporary session keys. The KDC maintains a database of principals (users and services) and their associated secret keys. It is composed of the authentication server and the ticket granting ticket server.
keyed compliance: A requirement whereby the user must have a license key (code) from the software provider to be able to change the usage limit or the expiration date of the license information.
keyed data queue: An IBM® i data queue that contains individual pieces of data (messages) that are associated with a key value. Messages can be received from a keyed data queue by specifying the key value or a relational operator. The system-recognized identifier for the object type is *DTAQ.
keyed sequence: An order in which records are retrieved that is based on the contents of key fields in records. See also arrival sequence.
keyed sequence access path: An access path to a database file that is arranged according to the contents of key fields contained in the individual records.
key-encrypting key: A key that is used exclusively for encrypting and decrypting keys. See also data-encrypting key.
key entry area: In AFP Utilities, an area shown at the lower part of the image area for entering the parameters for an element.
key field: A field used to arrange the records of a particular type within a file member.
key field level specification: Data description specification coded on the lines following the last field specification. Key field level specifications are permitted only for physical files or logical files.
keylock feature: A security feature in which a lock and key can be used to restrict the use of the display station.
keylock switch: A switch on the control panel that can be set to one of four different positions to establish the power-on and power-off modes allowed for the system.
key of reference: In COBOL, the key, either prime or alternate, currently being used to access records within an indexed file.
key pair: In computer security, a public key and a private key. When the key pair is used for encryption, the sender uses the public key to encrypt the message, and the recipient uses the private key to decrypt the message. When the key pair is used for signing, the signer uses the private key to encrypt a representation of the message, and the recipient uses the public key to decrypt the representation of the message for signature verification.
key policy: A single, key-protection transform that the initiating key server offers to the responding key server. A key policy governs Phase I negotiations.
key ring: In computer security, a file that contains public keys, private keys, trusted roots, and certificates. See also keystore file.
key schedule: In Cryptographic Support, sixteen 8-byte keys created by the Data Encryption Algorithm from the supplied cryptographic key that are used to encrypt or decrypt the supplied data.
key server: A server that negotiates the values that determine the characteristics of a dynamic virtual private network (VPN) connection that is established between two endpoints.
keystore: In security, a storage object, either a file or a hardware cryptographic card, where identities and private keys are stored, for authentication and encryption purposes. Some keystores also contain trusted, or public, keys. See also truststore.
keystore file: A key ring that contains both public keys that are stored as signer certificates and private keys that are stored in personal certificates. See also key database file.
key system: In telephony, the type of telephone system that provides telephones with more than one line for users. Outside lines appear directly on the telephones instead of being routed through an operator and transferred, as in PBX systems.
key table: In the Kerberos protocol, a file that contains service principal names and secret keys. The secret keys should be known only to the services that use the key table file and to the key distribution center (KDC).; A file on the service's host system. Each entry in the file contains the service principal's name and secret key. On IBM i, a key table file is created during configuration of network authentication service. When a service requests authentication to IBM i with Network Authentication Service configured, that IBM i checks the key table file for that service's credentials.
key/think time: In capacity planning, the time between interactive transactions such as typing, thinking, idle time, and so on. As an interactive user's proficiency with the application improves, the user's key/think time is likely to reduce, which can result in an increase in the observed throughput.
key translation: In Cryptographic Support, the conversion of a data encrypting key from encryption under a previous key-encrypting key to encryption under another key-encrypting key.
keyword: One of the predefined words of a programming language, artificial language, application, or command.
keyword functions: The result of processing DDS keywords in a record format specified on an operation.
keyword instruction: In REXX, one or more clauses, the first of which starts with a keyword that identifies the instruction. Some keyword instructions affect the flow of control, while others provide services to the programmer. CALL, DO, and PARSE are examples of keyword instructions.
Kilovolt ampere (kVA): A unit of power.
Korean double-byte character set: An IBM-defined double-byte character set for Korean, consisting of Korean non-Hangeul/non-Hanja set, Hangeul set, Hanja set and up to 1,880 user-definable characters.
Korean Hangeul character set: A subset of the Korean DBCS, consisting of 2672 Hangeul characters and 52 Jamo characters.
Korean Hanja character set: A subset of the Korean DBCS, consisting of 5265 Hanja characters.
Korean non-Hangeul/non-Hanja character set: A subset of the Korean DBCS, consisting of non-Hangeul/non-Hanja characters, such as Greek, Russian, Roman numeric, alphanumeric and related symbols, Katakana, Hiragana, and special symbols. There are 940 characters in this set.
kVA: See Kilovolt ampere.