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Published on 2010-06-07T02:41:52Z
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Do you need a license to use SHA-1 or SHA-2 for commercial purposes?
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I recently met Michael Coles and Rodeney Landrum the author of one of the kind book Expert SQL Server 2008 Encryption at SQLPASS in Seattle.
During the conversation we ended up how Microsoft is evolving encryption technology. The same discussion lead to talking about history of encryption tools in…
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So, I've got an app at work that encrypts a string using ColdFusion. ColdFusion's bulit-in encryption helpers make it pretty simple:
encrypt('string_to_encrypt','key','AES','HEX')
What I'm trying to do is use Ruby to create the same encrypted string as this ColdFusion script is creating. Unfortunately…
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I am making a licensing system when clients ask my server for a license and I send them a license if they are permitted to have one.
On my current system I encrypt the license using a single private key and have the public key embedded into the client application that they use to decrypt the license…
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I need to generate and validate product keys and have been thinking about using a public/private key system.
I generate our product keys based on
a client name (which could be a variable length string)
a 6 digit serial number.
It would be good if the product key would be of a manageable length…
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I have an idea for encryption that I could program fairly easily to encrypt some local text file.
Given that my approach is novel, and does not use any of the industry standard encryption techniques, would I be able to test the strength of my encryption using 'cracker' apps or suchlike?
Or do all…
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I have an instance of dict with ints, floats, strings as keys, but the problem is when there are a as int and b as float, and float(a) == b, then their hash values are the same, and thats what I do NOT want to get because I need unique hash vales for this cases in order to get corresponding values…
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What property makes Hash table, Hash list and Hash tree different from each other? Which one is used when? When is table superior than tree.
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Hi, I would like to construct a hash table that looks up keys in sequences (strings) of bytes ranging from 1 to 15 bytes.
I would like to store an integer value, so I imagine an array for hashing would suffice. I'm having difficulty conceptualizing how to construct a hash function such that given…
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Theoretically does hashing a unique value yield a unique value?
Let's say I have a DB table with 2 columns: id and code. id is an auto-incrementing int and code is a varchar. If I do ...
$code = sha1($id);
... and then store $code into the same row as $id. Will my code column be unique as well…
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I attempted to install the perl module Net::Twitter::Role::API::Lists using WHM and after doing so my whole site came down. It seems that something that was updated with the install isn't functioning correctly and since our website it written in Perl none of our site scripts will run.
In almost 8…
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