翻訳と辞書
Words near each other
・ File Streaming Technology
・ File synchronization
・ File system
・ File system API
・ File system fragmentation
・ File system permissions
・ File System Visualizer
・ File transfer
・ File Transfer Protocol
・ File transfer protocol (disambiguation)
・ File types
・ File Under Black
・ File Under Popular
・ File Under Ramones
・ File URI scheme
File verification
・ File viewer
・ File virtualization
・ Fileboard
・ FILECOMP
・ FiledBy
・ FileDirector
・ Filefish
・ Filefjell
・ Filefjell Kongevegen
・ Fileh Khasseh
・ Fileh Varin
・ FileHippo
・ Filelight
・ Filem Negara Malaysia


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File verification : ウィキペディア英語版
File verification

File verification is the process of using an algorithm for verifying the integrity or authenticity of a computer file. This can be done by comparing two files bit-by-bit, but requires two copies of the same file, and may miss systematic corruptions which might occur to both files. A more popular approach is to also store checksums (hashes) (message digests) of files for later comparison.
== Integrity verification ==
File integrity can be compromised, usually referred to as the file becoming corrupted. A file can become corrupted by a variety of ways: faulty storage media, errors in transmission, write errors during copying or moving, software bugs, and so on.
Hash-based verification ensures that a file has not been corrupted by comparing the file's hash value to a previously calculated value. If these values match, the file is presumed to be unmodified. Due to the nature of hash functions, hash collisions may result in false positives, but the likelihood of collisions is often negligible with random corruption.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「File verification」の詳細全文を読む



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