如题。我现在要发一份传真给某公司，并且很重要却无法通过其他书面形式递交。
如果用GnuPG签名后传真去，可以作为法律凭证么？
Alex
Notes:
1. Fell free to EMail me and I'll fell free to ignore you
2. Use English or STANDARD Chinese (Traditional preferred, but
Simplified is also acceptable), or I'll certainly ignore you.
3. Use plain text, because I've gotta no rich-text processing system.
4. CheungTiFan at gmail.com is the ONLY email account I'll check everyday.

在 Friday 25 July 2008 13:16:09，Alex Zhang 写道：
> 如题。我现在要发一份传真给某公司，并且很重要却无法通过其他书面形式递交。
> 如果用GnuPG签名后传真去，可以作为法律凭证么？

传真过去的话，只能辨认可见的文字，空格什么的则无法判断，那对方也就无法通过收到的传真来产生摘要并验证你的签名了。根据生日破解法，只要你的文章中可以添加足够数量的空格（或其它不可见字符），就总可以获得一个符合你签名的样本。于是你签了名就跟没签一样了。
个人意见，仅供参考。

> Alex
> Notes:
> 1. Fell free to EMail me and I'll fell free to ignore you
> 2. Use English or STANDARD Chinese (Traditional preferred, but
> Simplified is also acceptable), or I'll certainly ignore you.
> 3. Use plain text, because I've gotta no rich-text processing system.
> 4. CheungTiFan在gmail.com is the ONLY email account I'll check everyday.
> _______________________________________________
> zeuux-universe mailing list
> zeuux-universe在zeuux.org
> http://www.zeuux.org/mailman/listinfo/zeuux-universe
> 
> ZEUUX Project - Free Software, Free Society!
> http://www.zeuux.org
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我在传真里面提到了该文档的电子版的下载地址，此文件从网上可以得到，是我签名后的文件，这样的话是不是有效呢？
下载地址也同时被签名了。
Notes:
1. Fell free to EMail me and I'll fell free to ignore you
2. Use English or STANDARD Chinese (Traditional preferred, but
Simplified is also acceptable), or I'll certainly ignore you.
3. Use plain text, because I've gotta no rich-text processing system.
4. CheungTiFan at gmail.com is the ONLY email account I'll check everyday.



2008/7/28 Wang Guoqin <wangguoqin1001 at gmail.com>:
> 在 Friday 25 July 2008 13:16:09，Alex Zhang 写道：
>> 如题。我现在要发一份传真给某公司，并且很重要却无法通过其他书面形式递交。
>> 如果用GnuPG签名后传真去，可以作为法律凭证么？
>
> 传真过去的话，只能辨认可见的文字，空格什么的则无法判断，那对方也就无法通过收到的传真来产生摘要并验证你的签名了。根据生日破解法，只要你的文章中可以添加足够数量的空格（或其它不可见字符），就总可以获得一个符合你签名的样本。于是你签了名就跟没签一样了。
> 个人意见，仅供参考。
>
>> Alex
>> Notes:
>> 1. Fell free to EMail me and I'll fell free to ignore you
>> 2. Use English or STANDARD Chinese (Traditional preferred, but
>> Simplified is also acceptable), or I'll certainly ignore you.
>> 3. Use plain text, because I've gotta no rich-text processing system.
>> 4. CheungTiFan at gmail.com is the ONLY email account I'll check everyday.
>> _______________________________________________
>> zeuux-universe mailing list
>> zeuux-universe at zeuux.org
>> http://www.zeuux.org/mailman/listinfo/zeuux-universe
>>
>> ZEUUX Project - Free Software, Free Society!
>> http://www.zeuux.org
>
> _______________________________________________
> zeuux-universe mailing list
> zeuux-universe at zeuux.org
> http://www.zeuux.org/mailman/listinfo/zeuux-universe
>
> ZEUUX Project - Free Software, Free Society!
> http://www.zeuux.org
>

签名后的文档只能证明文档是由你发出的而不是由其他什么人冒充你的名义发的。

在 2008-7-25，下午2:16， Alex Zhang 写道：

> 如题。我现在要发一份传真给某公司，并且 
> 很重要却无法通过其他书面形式递交。
> 如果用GnuPG签名后传真去，可以作为法律凭证么？
> Alex
> Notes:
> 1. Fell free to EMail me and I'll fell free to ignore you
> 2. Use English or STANDARD Chinese (Traditional preferred, but
> Simplified is also acceptable), or I'll certainly ignore you.
> 3. Use plain text, because I've gotta no rich-text processing system.
> 4. CheungTiFan在gmail.com is the ONLY email account I'll check  
> everyday.
> _______________________________________________
> zeuux-universe mailing list
> zeuux-universe在zeuux.org
> http://www.zeuux.org/mailman/listinfo/zeuux-universe
>
> ZEUUX Project - Free Software, Free Society!
> http://www.zeuux.org

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在 Monday 28 July 2008 23:02:08，Sutra Zhou 写道：
> 签名后的文档只能证明文档是由你发出的而不是由其他什么人冒充你的名义发的。
> 

Alex的意思应该也只需证明发送者的身份和信件的完整性吧？

> 在 2008-7-25，下午2:16， Alex Zhang 写道：
> 
> > 如题。我现在要发一份传真给某公司，并且 
> > 很重要却无法通过其他书面形式递交。
> > 如果用GnuPG签名后传真去，可以作为法律凭证么？
> > Alex
> > Notes:
> > 1. Fell free to EMail me and I'll fell free to ignore you
> > 2. Use English or STANDARD Chinese (Traditional preferred, but
> > Simplified is also acceptable), or I'll certainly ignore you.
> > 3. Use plain text, because I've gotta no rich-text processing system.
> > 4. CheungTiFan在gmail.com is the ONLY email account I'll check  
> > everyday.
> > _______________________________________________
> > zeuux-universe mailing list
> > zeuux-universe在zeuux.org
> > http://www.zeuux.org/mailman/listinfo/zeuux-universe
> >
> > ZEUUX Project - Free Software, Free Society!
> > http://www.zeuux.org
> 
> 
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