Hash Code and Checksum - whats the difference? The difference is that a checksum value should change, even if only a small modification is made to the data item For a hash value, the requirement is merely that real-world data items should have distinct hash values A clear example are strings A checksum for a string should include each and every bit, and order matters
md5 - What checksum algorithm should I use? - Stack Overflow Rather than storing the whole blob (they can be up to 5MBs), I'm thinking I should compute a checksum of it, store this and compute the same checksum a little bit later, to see whether the blob has been updated The goal is to minimize the following (in that order) : size of the checksum; time to compute
c - How is a CRC32 checksum calculated? - Stack Overflow The part that gets me is when he says "this is it" and then adds on, "oh by the way, it can be reversed or started with different initial conditions," and doesn't give a clear answer of what the final way of calculating a CRC32 checksum given all of the changes he just added Is there a simpler explanation of how CRC32 is calculated?
checksum - Windows equivalent of linux cksum command - Stack Overflow This solution works for SHA256 checksum Press the Windows key Type PowerShell Select Windows Powershell Press Enter key Paste the command Get-FileHash C:\Users\Donald\Downloads\File-to-be-checked-by-sha256 exe | Format-List Replace File-to-be-checked-by-sha256 exe by the name of your file to be checked
Can anyone define the Windows PE Checksum Algorithm? The CheckSum field is 32 bits long and is calculated as follows 1 Add all dwords (32 bit pieces) of the entire file to a sum Add all dwords of the entire file not including the CheckSum field itself, including all headers and all of the contents, to a dword If the dword overflows, add the overflowed bit back to the first bit (2^0) of the dword
What are the differences between CHECKSUM() and BINARY_CHECKSUM() and . . . CHECKSUM is intended for use in building hash indexes BINARY_CHECKSUM Returns the binary checksum value computed over a row of a table or over a list of expressions BINARY_CHECKSUM can be used to detect changes to a row of a table It does hint that binary checksum should be used to detect row changes, but not why
windows - What is the best way to calculate a checksum for a file that . . . I'm on a Windows machine and I want to run a checksum on the MySQL distribution I just got It looks like there are products to download, an unsupported Microsoft tool, and probably other options I'm wondering if there is a consensus for the best tool to use This may be a really easy question, I've just never run a checksum routine before
Whats the difference between a CRC and a checksum? CRC (Cyclic Redundancy Check) is a type of checksum, specifically a position dependent checksum algorithm (among others, such as Fletcher's checksum, Adler-32) As their name suggest, these detect positional changes as well, which makes them more robust - thus more widely used - than other checksum methods