Glossary of Terms

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H

H

Ha Ha Only Serious

Hack

Hack On

Hack Up

Hacker

Hacker code of ethics

Hacker Ethic, The

Hacker vulnerability testing tools

Hackers (and Unauthorized Users)

Hacking

Hacking X For Y

Hackish

Hair

Hairy

HAKMEM

Hakspek

Half-Duplex Operation

Halftone Characteristic

hallenge-Handshake Authentication Protocol (CHAP)

Hammer

Hamming Distance

Hamster

Hand geometry scanning

Handle

Handled

Handler

Handling Caveats

Handling Restrictions

Handshaking Procedure

Handshaking Procedures

Hand-shaking stages

Hang

Happily

Haque

Harden

Hardware Asset Management

Hardware Handshaking

Hardware Isolation Mechanisms

Hardware Protection Mechanisms

Hardware Security

Has The X Nature

Hash

Hashed Message Authentication Code

Hashing

Hat

Hazard

HCF

HD

HDLC

HDM

Header

Header checksum

Header destruction

Head-On Collision

Health Information Portability and Accountability Act (HIPAA[AuQ3][AuQ3])

Hertz

Hex

Hexadecimal directory traversal attack

Hexit

HF

HHOK

HHOS

Hidden Sections

Hierarchical Computer Network

Hierarchical Development Methodology (HDM)

Hierarchically Synchronized Network

High Order Language

High Risk Environment

High-Level Control

High-Level Data Link Control

High-Level Language

Highly

Hing

HIPAA (Health Information Portability and Accountability Act)

Hirsute

History Of Information Security

HLL

HMAC

HMAC (key-Hashed Message Authentication Code)

Hobbit

Hog

HOIS

HOIST

HOL

Hole

Homeland Security Act of 2002

Hook

Hop

Hose

Hosed

Host

Host assessment tools

Host To Front-End

Host To Front-End Protocol

Hostile Cognizant Agent

Hostile Intelligence Sources

Hostile Threat Environment

Hosting companies

Housekeeping Procedures

HP-SUX

HSM

HTML (Hypertext Markup Language)

HTML body parts

HTTP (Hypertext Transfer Protocol)

HTTP proxy server

Https

Huff

Human Intelligence

Human Interface Functions

HUMINT

Humma

Hung

Hungus

HUS

HUSK

Hybrid Computer

Hybrid TCP/IP-OSI architecture

Hypertext Markup Language (HTML)

Hypertext Transfer Protocol (HTTP)

Hysterical Reasons

Hz

Hot Spot

n. [primarily used by C/UNIX programmers, but spreading] It is received wisdom that in most programs, less than 10% of the code eats 90% of the execution time; if one were to graph instruction visits versus code addresses, one would typically see a few huge spikes amidst a lot of low-level noise. Such spikes are called `hot spots' and are good candidates for heavy optimization or hand-hacking. The term is especially used of tight loops and recursions in the code's central algorithm, as opposed to (say) initial set-up costs or large but infrequent I/O operations. See tune, bum, hand-hacking.
The active location of a cursor on a bit-map display. "Put the mouse's hot spot on the `ON' widget and click the left button. "
A screen region that is sensitive to mouse clicks, which trigger some action. Hypertext help screens are an example, in which a hot spot exists in the vicinity of any word for which additional material is available.
In a massively parallel computer with shared memory, the one location that all 10,000 processors are trying to read or write at once (perhaps because they are all doing a busy-wait on the same lock).
More generally, any place in a hardware design that turns into a performance bottleneck due to resource contention.