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Cc: "Alexey Zakhlestin" <indeyets@gmail.com>,
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To: "Martin Alterisio" <malterisio777@gmail.com>
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Date: Fri, 21 Dec 2007 17:32:36 +0100
References: <20071209010552.GA12561@openwall.com> <476B0872.3060408@zend.com> <52dbac0f0712201815t3b8d4d7do85980100a26e1609@mail.gmail.com> <cd5680a20712210155p35327563u1ddc2975f417024d@mail.gmail.com> <52dbac0f0712210529l6a78f554j9482b1116fa3039c@mail.gmail.com>
Subject: Re: [PHP-DEV] faster & public domain MD5 implementation
From: dz@bitxtender.com (=?ISO-8859-1?Q?David_Z=FClke?=)

Not entirely correct. As I pointed out in the other thread, not all  
countries have the concept of transferrable copyright. Therefor, a  
note should be added that explicitly states that everyone is free to  
use it without permission, fees etc. Much like a BSD or MIT license,  
but without the additional conditions of preserving copyright notices.



David



Am 21.12.2007 um 14:29 schrieb Martin Alterisio:

> No, public domain isn't recognized by copyright law as a copyright  
> notice.
> An extra line should be added that says something like "no copyright  
> is
> claimed", and attach a year range where the copyright is in effect  
> (since
> copyright expires, if I remember correctly). Anyway, the keyword  
> here is
> "copyright", which is recognized internationally (which means you  
> should use
> this word even if writing the copyright notice in another language).
>
> Without a copyright notice, the code isn't apt for distribution. The  
> author
> could claim that he did not give his consent for public distribution  
> and
> that the code was an in-house development. Anyway, it's too  
> complicate and I
> understand very little. To get the real facts here, you should talk  
> to your
> lawyer.
>
> 2007/12/21, Alexey Zakhlestin <indeyets@gmail.com>:
>>
>> isn't "public domain" specific enough?
>>
>> On 12/21/07, Martin Alterisio <malterisio777@gmail.com> wrote:
>>> 2007/12/20, Stanislav Malyshev <stas@zend.com>:
>>>>
>>>>> Attached is a quick patch for PHP 5.2.5 that replaces RSA's
>> copyrighted
>>>>> implementation of MD5 with my public domain one:
>>>>>
>>>>>
>>>>
>> http://cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/popa3d/popa3d/md5/
>>>>
>>>> Tried that one and it is about 30% faster indeed (on md5-only
>> benchmark,
>>>> 32-bit Linux on AMD Opteron. Anybody objects to accepting this?
>>>>
>>>>
>>> Just one, but is a mere formality. I didn't see any copyright  
>>> notice on
>> the
>>> code nor a licensing document attached. I have not much of the legal
>>> mumbo-jumbo comprehension, so, correct me if I'm wrong, shouldn't
>> external
>>> code that's to be included in the php codebase meet these legal
>> formalities
>>> so it doesn't become a liability?
>>>
>>> That's all.
>>>
>>> Best Regards,
>>>
>>> Martin Alterisio
>>>
>>> PS: Does anyone knows if using a nickname for authorship is  
>>> considered
>>> legally valid? I believe it might be valid, think about writers  
>>> that use
>>> such pseudonyms, but I'm not sure...
>>>
>>
>>
>> --
>> Alexey Zakhlestin
>> http://blog.milkfarmsoft.com/
>>