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RGB color model <RGB>

Alias:
RGB color model
Field:
Imaging > expression of color > RGB color model

One of the notation which is used the occasion where color is expressed with computer. It expresses color red (R) green (G) blue (B) as combination of three colors. These 3 colors are called primary colors of light, can express all colors with this combination.

RHL <Red Hat Linux>

Alias:
[retsudohatsuto] Linux
Field:
OS > UNIX > RHL

The Linux distribution the Red Hat Software corporation developing & selling (the distribution package). With the distribution where the user is most, Red Hat Linux individual package management mechanism RPM is adopted for also other many distribution. The individual system construction utility is prepared large number, also maintenance has become easy. Many application software is corresponding commercial business/regardless of free.

RIA

Reading: Rear
Full spelling: Rich Internet Applications
Field:
WWW > Production > RIA

It is the Web application which the page which is described to user interface with simple HTML Flash and the Java applet, making use of Ajax and the like, compared to is superior in operativity and expression power.

As for HTML which describes the Web page, because it is designed with purpose, that the static page is described combining letter and the still picture operativity and expression power of Web application compare unfavorably when you think from the usual application software, largely. The operation of accompanying page transition operation to be heavy is easy to become also cause of operational error.

In order to improve such circumstance, making the client read who is mounted on the Web browser with Flash and the like, while it utilized the merit of Web application by making execute, the application which improves operativity and expression power appeared. This is RIA.

RIFF

Reading: [rihu]
Full spelling: Resource Interchange File Format
Field:
Windows > Media technology > RIFF

The compatible format in order was decided by the Microsoft corporation, to house the data of various types such as picture and sound in one file. It is the format which becomes the basis of the multimedia application software of Windows. Also the WAV file and the AVI file are one of the file of RIFF type.

Rijndael

Reading: [raindaru]
Field:
Security > code/hash > Rijndael

The secret key encoding algorithm which was developed by Belgian several scholar Joan Daemen and Vincent Rijmen. Encoding standard AES of the next generation (Advanced Encryption Standard) it was selected in 2000 October, the American government standard technical bureau (NIST) by.

To as for standard of that encoding system it was DES which the IBM corporation developed, but because relatively it becomes fragility depending upon the improvement of the computer and the development of theory, it was adopted as encoding standard of the next generation who is substituted to this.

Dividing the key as block, we take the system which it encodes, can appoint the length of the key and block respectively from midst of 128 bits, 192 bits and 256 bits. In addition, it is not to do with general ones which call the conversion of the bit which is in the midst of encoding Feistel structure, there is also a feature such that the conversion to which three is different respectively is used, it is appraised high as a cryptographic strength and the encoding algorithm which both of speed is superior.