A key block is
a key wrapping (encryption) mechanism that contains the encrypted key, its constraints for use, and additional data about the key
. The purpose of a key block is to protect the integrity of an encrypted key. For banking and related financial services, the key wrapping process uses AES and ANSI TR31.
What is Keyblock LMK?
DES Keyblock LMK – contains
a triple-length 3DES key
. This key provides a security strength of 112-bits, and can be used to protect subordinate DES, RSA & HMAC keys.
What is a key block in art?
In printmaking: Colour woodcut. The first, the key block, is
generally the one that contains most of the structural or descriptive elements of the design
, thus serving as a guide for the disposition of the other colours. After the key block is finished and printed, the print is transferred to the second…
What is TR-31 key block?
The TR-31 key block is
a format defined by the ANS Standards Committee to support interchange of symmetric keys in a secure manner and with key attributes included in the exchanged data
. At the beginning of every TR-31 key block is a header consisting of a required portion possibly followed by an optional portion.
What is a key variant?
The key variant
provides an association with the key’s intended purpose
, which allows the Secure Cryptographic Device (SCD) to enforce a specific use. However, it does not by itself provide for key-block integrity or authentication.
What are the 3 main types of intaglio printing?
The three main types of Intaglio printing are
etching, engraving, and drypoint
. Explain the difference between engraving and etching. Engraving is a process of incising an image onto a hard surface such as wood, stone, or a copper plate.
What are the two main types of printmaking?
The two types of printmaking are
relief printing and intaglio
. Relief printing is done by outlining an image on a surface, and then carving along the outline. The artist then applies the raised areas with ink, to be pressed on to a surface.
How long should a key be used before it is replaced?
Having said all this, the NIST recommendation for symmetric Data Encryption Keys (DEKs) is
2 years or less
.
What is LMK in Thales?
The header contains a field that registers the value of the Thales
HSM Local Master Key
(LMK) used for ciphering. Therefore, in theory, only Thales Key Blocks can only be used with Thales machines. The header contains a field that informs if there are optional headers, and if so, how many there are.
What is variant LMK?
LMK Variants
An LMK variant is
created by performing a XOR operation with a value on the LMK key
. For example, variant 1 of an LMK is created by XORing the LMK with the value 000000000000000000000000000000A6. The Thales HSM supports 10 variants for each LMK pair, with variant 0 being the clear LMK itself.
Which form of intaglio is the oldest?
There are two techniques to cut the lines of an intaglio print,
engraving
and etching. Engraving is the oldest method and it uses a burin with sharp V-shaped cutting section, which is pressed gradually down onto the surface of a copper plate and then driven more or less deeply through the metal.
What is intaglio similar to?
Intaglio printing is the opposite of relief printing, in that the printing is done from… Virtually all intaglio plates are printed by similar means, using a
roller press
. This is essentially composed of two bearing rollers with a movable flatbed sandwiched horizontally between them.
Which country is famous for intaglio printing?
Originating in
Italy
, the word “intaglio,” with a silent “g,” refers to prints made from plates in which the areas that carry the ink are recessed below the surface of the plate.
Why is linocut criticized?
Though major artists began adopting the linocut technique as early as 1903, many in the art community shunned the medium due to its simplicity, citing it as
lacking in challenge
. Fortunately, artistic mediums cannot simply be judged on elitism alone – art, it has been proven, pays little mind to boundaries.
What is the most common type of printmaking?
Serigraphy (Screen Printing)
The most popular form of this style of printmaking is called Screen printing, where a mesh is stretched over a frame, areas are blocked and a squeegee pulled across the mesh, prints the image around the blocked areas.
What are the four most well known printmaking techniques?
Many experts agree that printmaking techniques can be roughly divided into four basic categories of relief,
intaglio, planographic and stencil
. The relief method is one of the simplest types of printmaking in which the material is carved or otherwise taken away from around the protruding design that is to be printed.
