Top "Md5" questions

How do I check if a string is a valid md5 or sha1 checksum string

I don't want to calculate a file's checksum, just to know if a given string is a valid checksum

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How do I convert password hashing from MD5 to SHA?

I've got an old application that has user passwords stored in the database with an MD5 hash. I'd like to …

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Can an MD5 hash have ONLY numbers or ONLY letters in it?

I have been researching but I am clueless. I know that MD5 can have both numbers and letters but if …

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Is there an MD5 Fixed Point where md5(x) == x?

Is there a fixed point in the MD5 transformation, i.e. does there exist x such that md5(x) == x?

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using php to create a joomla user password?

I'm trying to create a custom registration component for Joomla, and I was wondering if anyone knew how to create …

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Best practices for efficiently storing md5 hashes in mysql

Possible field types: BINARY(16) CHAR(32) BIGINT + BIGINT How do I decide which one to use?

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How reliable is the adler32 checksum?

I wonder how reliable the adler32 checksum is, compared to e.g. md5 checksums? It was told on wikipedia that …

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Very slow to generate MD5 for large file using Java

I am using Java to generate the MD5 hash for some files. I need to generate one MD5 for several …

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Library providing various hash algorithms (MD5, SHA1, SHA256, etc) in Java?

Is there a simple library out there for Java in a Maven repository that will give me simple, one-liner hash …

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how to create md5 hash of a column in R?

I have a data frame ID, VID 1 , xyz-0001 I would like to replace VID with md5 hash of VID column …

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