Before public key cryptosystem is devised, it was devised in 1976, Whitfield Diffie and Martin E. by Hellman, using the channel which is not safe, the secret key safely sending and receiving key exchange system in order to do.
It was problem whether with secret key code, the key information which both of decoding encoding and the cryptogram is used different from open key code, it is necessary for both parties of the transmission person and the receiving believer to share, how does this secret key and gives to the partner safely that.
With Diffie-Hellman key exchange, making use of discrete logarithm problem, it is not the secret key itself, information of the release which is formed from random number and secret key sending and receiving is done.
Like this, by the fact that it does, communication contents being wiretapped by the third party, there are no times when at once it is known the secret key, can exchange key information safely. However, interrupting the communication of the transmission person and the receiving believer, the [ri] which designate the information of release as your own ones being able to apply, you try the cryptanalysis, vis-a-vis weak thing is known. |
DI <Dependent fill>
Reading: D eye
Full spelling: Dependency Injection
Field:
Programming > DI
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The design philosophy that it fills the cord/code which has the dependency between objects at the execution time.
In order to cancel ill-smelling in the errand of Entity Bean which is adopted for former EJB, the application server group which is called the “lightweight container” appeared. As an example of the lightweight container, the user it is most, and, simplicity access and connection are easy, there is and domestic production “Seasar2” etc. It is expected that it is called the up-to-date design philosophy which changes Java development, improves the development cycle of the software substantially.
As “the dependency” you consider the cord/code where object utilizes other object, in order to fill the cord/code which had these dependencies at the execution time, you are called dependent fill. From the past, similar idea to exist, IoC with it was called, but Martin Fowler of the ThoughtWorks corporation which is the prominent software design consultant with the appearance of the lightweight container, designated. |
Diamondtron <Diamond tron>
Field:
Imaging > display > CRT > Diamondtron |
| The picture tube of the aperture grille system which the Mitubishi Electric Corporation developed. In the past the number of electron guns as for Trinitron 1, as for diamond tron 3 had the difference, but presently there are also some which adopt 3 electron gun systems even with Trinitron. In comparison with shadow mask system, contrast being high, the picture is bright, coloration is good. However, price is higher than the shadow mask, durable years service life is short. The horizontal line whose 2 it is called the damper line in the top and bottom of the picture are thin the person who dislikes the fact that it has entered it is. In comparison with Trinitron, there are times when delicate color is reproduced when indicating with RGB, is faced to the use which handles image. |
DIB
Reading: D ivy
Full spelling: Device Independent Bitmap
Field:
Multimedia > graphics > picture type > DIB
Expression of information > file format > DIB
Windows > Media technology > DIB
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The picture format which is utilized standard with Windows. With image information of BMP type by the fact that the color pallet is housed, under which kind of environment it is designed in such a way that you can obtain the same indication. It is the picture type which does not depend on the equipment.
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