staff
2,096
edits
Files:CRC-verified files: Difference between revisions
no edit summary
m (rephrase) |
No edit summary |
||
| Line 5: | Line 5: | ||
If you've hashed a file for use it with [[ed2kdump]], and AniDB lists it as 'CRC-verified', you don't need to do any further verification: the file is definitely uncorrupted. | If you've hashed a file for use it with [[ed2kdump]], and AniDB lists it as 'CRC-verified', you don't need to do any further verification: the file is definitely uncorrupted. | ||
= About CRC = | == About CRC == | ||
A CRC is a form of file hash: a short representation of a longer file that is likely to change if the file is modified. CRC is a 32-bit hash, which means that the chances of a random corruption not changing the CRC are four million to one against. Many groups release CRC hashes of their released files, so you can make sure you've downloaded them correctly. | A CRC is a form of file hash: a short representation of a longer file that is likely to change if the file is modified. CRC is a 32-bit hash, which means that the chances of a random corruption not changing the CRC are four million to one against. Many groups release CRC hashes of their released files, so you can make sure you've downloaded them correctly. | ||
| Line 13: | Line 13: | ||
The other hashes AniDB lists (MD5, SHA-1, and ed2k) are ''stronger'' than CRC: the chance of a CRC differing between two files with the same ed2k, SHA-1 or MD5 hash is at least 79 billion billion billion to one. If the MD5, SHA-1, or ed2k hash matches a published 'good hash', then it is very unlikely indeed that the CRC will fail. When AniDB lists a file as CRC-verified, you can use any of the hashes listed to verify the file. | The other hashes AniDB lists (MD5, SHA-1, and ed2k) are ''stronger'' than CRC: the chance of a CRC differing between two files with the same ed2k, SHA-1 or MD5 hash is at least 79 billion billion billion to one. If the MD5, SHA-1, or ed2k hash matches a published 'good hash', then it is very unlikely indeed that the CRC will fail. When AniDB lists a file as CRC-verified, you can use any of the hashes listed to verify the file. | ||
== Weblinks == | |||
* [http://en.wikipedia.org/wiki/Cyclic_redundancy_check CRC article on Wikipedia] | |||
[[Category:Definitions]] | [[Category:Definitions]] | ||