Information: - Disk encryption software is computer security software that protects the confidentiality of data stored on computer media (e.g., a hard disk, floppy disk, or USB device) by using disk encryption. - Disk encryption is a technology which protects information by converting it into unreadable code that cannot be deciphered easily by unauthorized people. Disk encryption uses disk encryption software or hardware to encrypt every bit of data that goes on a disk or disk volume. Disk encryption prevents unauthorized access to data storage. - PGP Virtual Disk is an Disk encryption system that allows one to create a virtual encrypted disk within a file . Older versions for Windows NT were freeware ( for example , bundled with PGP v6.0.2i ; and with some of the CKT builds of PGP ) . These are still available for download , but no longer maintained . Today , PGP Virtual Disk is available as part of the PGP Desktop product family , running on Windows 2000/XP/Vista , and Mac OS X. - The bit is a basic unit of information in computing and digital communications. A bit can have only one of two values, and may therefore be physically implemented with a two-state device. These values are most commonly represented as either a . The term "bit" is a portmanteau of binary digit. In information theory, the bit is equivalent to the unit "shannon", named after Claude Shannon. - In cryptography, encryption is the process of encoding messages or information in such a way that only authorized parties can access it. Encryption does not of itself prevent interference, but denies the intelligible content to a would-be interceptor. In an encryption scheme, the intended information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. It is in principle possible to decrypt the message without possessing the key, but, for a well-designed encryption scheme, large computational resources and skill are required. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients but not to unauthorized users. After reading the paragraphs above, choose the best answer for the entity that related to 'pgpdisk' with the relationship of 'instance of'. Choices: - algorithm - code - computer security - cryptography - data - digit - disk - disk encryption software - encoding - information - information theory - interference - key - message - principle - process - security - technology - volume
disk encryption software

Q: Information: - Seoul () officially the Seoul Special City is the capital and largest metropolis of the Republic of Korea (commonly known as South Korea), forming the heart of the Seoul Capital Area, which includes the surrounding Incheon metropolis and Gyeonggi province, the world's 16th largest city. It is home to over half of all South Koreans along with 678,102 international residents. - Suwon (Hangul: , Hanja: ) is the capital and largest metropolis of Gyeonggi-do, South Korea's most populous province which surrounds Seoul, the national capital. Suwon lies about south of Seoul. It is traditionally known as "The City of Filial Piety". With a population close to 1.2 million, it is larger than Ulsan, although it is not governed as a metropolitan city. - Satellite City was a Welsh sitcom which started out originally as a radio show on BBC Radio Wales in 1994 and then evolved into a TV version made by BBC Wales and was first broadcast in 1996. - Seongnam is the second largest city in South Korea's Gyeonggi Province after Suwon and the 10th largest city in the country. Its population is approximately one million. Seongnam is a satellite city of Seoul. It is largely a residential city located immediately southeast of Seoul and belongs to the Seoul National Capital Area. - Seoul Subway Line 8 of the Seoul Metropolitan Rapid Transit Corporation was built 1990 - 99 and mainly serves the southeastern parts of Seoul and Seongnam . Jamsil to Amsa was opened July 1999 . Its color is rose . In 2014 construction will begin to extend the line north of the Han River through Guri Station to Byeollae Station on the Gyeongchun Line . The extension will add 11.37 km of line to the already existing 17.7 km. Construction is set to finish in 2022 . Potentially the southern end will be extended 3.9 km to Pangyo Station around 2023 . - Gyeonggi-do (Hangul: ) is the most populous province in South Korea. Its name, "Gyeonggi" means "the area surrounding capital". Thus "Gyeonggi-do" can be translated as "province surrounding Seoul". The provincial capital is Suwon. SeoulSouth Korea's largest city and national capitalis in the heart of the province but has been separately administered as a provincial-level "special city" since 1946. IncheonSouth Korea's third largest cityis on the coast of the province and has been similarly administered as a provincial-level "metropolitan city" since 1981. The three jurisdictions collectively cover 11,730km, with a combined population of 25.6 millionamounting to over half of the entire population of South Korea. - Seoul Metropolitan Rapid Transit Corporation (SMRT) was established in 1994 to operate the Seoul Subway lines 5, 6, 7, 8 in Seoul, South Korea. After reading the paragraphs above, choose the best answer for the entity that related to 'seoul subway line 8' with the relationship of 'inception'. Choices: - 1 - 1946 - 1981 - 1994 - 1996 - 2 - 25 - 678 - 8
A: 1996