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Glossary - H |
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- Halftone
- An image produced by breaking the subject into small dots of varying intensities of gray ranging from white to black.
- Hologram
- A unique photographic printing that provides a three-dimensional effect on a flat surface. Holograms cannot be easily copied and are used for security and aesthetic purposes on wristbands.
- Hot stamp
- Setting a design on a relief die, which is then heated and pressed onto the printing surface.
- Hacking
- The act of gaining illegal or unauthorized access to a computer system or network.
- Hash algorithm
- A software algorithm that computes a value (hash) from a particular data unit in a manner that enables detection of intentional/unauthorized or unintentional/accidental data modification by the recipient of the data.
- Head-end system
- The physical access control server, software and database(s) used in a physical access control system.
- High frequency (HF)
- Radio frequencies (RF) in the range of 3 MHz to 30 MHz. When used in an RF-based identification system, the high frequency used is typically 13.56 MHz.
- Hybrid card
- A smart card that contains two smart card chips–both contact and contactless chips–that are not interconnected.
- Haik
- A voluminous piece of usually white cloth worn as an outer garment in northern Africa
- Hazel
- A light brown to strong yellowish brown.
- Haversack
- A bag similar to a knapsack but worn over one shoulder
- Havelock
- A covering attached to a cap to protect the neck from the sun or bad weather
- Hauberk
- A tunic of chain mail worn as defensive armor from the 12th to the 14th centuries
- Hard hat
- A protective hat made of rigid material, as metal or fiberglass, and worn especially by construction workers
- Haik
- A voluminous piece of usually white cloth worn as an outer garment in northern Africa
- Hazel
- A light brown to strong yellowish brown.
- Haversack
- A bag similar to a knapsack but worn over one shoulder
- Havelock
- A covering attached to a cap to protect the neck from the sun or bad weather
- Hauberk
- A tunic of chain mail worn as defensive armor from the 12th to the 14th centuries
- Hard hat
- A protective hat made of rigid material, as metal or fiberglass, and worn especially by construction workers
- Halter
- A woman's blouse that leaves the back, arms, and midriff bare and that is typically held in place by straps around the neck and across the back
- Halftone
- A uniform series of dots that give the appearance of a lighter shade of a solid color. the number of dots-per-inch is called the line count or frequency. The amount of coverage is determined by the percentage of dots.
- Habiliments
- The dress characteristic of an occupation or occasion
- Habergeon
- A medieval jacket of mail shorter than a hauberk; hauberk
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