The inbuilt Java crc32 code might work well too:

http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/CRC32.html



On 10/15/07, Claude Schneegans <[EMAIL PROTECTED]> wrote:
>  >>Even if the tag is not
> published I'd love to hear a little about the concepts of how it works, you
> can mail me off list if you'd prefer to keep it private.
>
> Actually, it does not use MD5 algorithm, but a CRC-32 checksum, which
> returns an 8 characters hexadecimal value.
> The probability of having two different files having the same value is
> near zero, especially if you consider
> only files having the same length.
>
> It is a C++ tag (Windows only), but much more efficient than using CF code.
> I'm sending the tag to you as a beta test.
>
> --
> _______________________________________
> REUSE CODE! Use custom tags;
> See http://www.contentbox.com/claude/customtags/tagstore.cfm
> (Please send any spam to this address: [EMAIL PROTECTED])
> Thanks.
>
>
> 

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