RSA密钥长度和导出限制 [英] RSA key length and export limitations

问题描述

我知道，使用密钥的长度有很多限制（几乎每个国家的导入和导出限制）。通常，它从64位到256位。要使用更多的位，它是强制要求权限的许可。

I know, there are a lot of limitations to the length of used key (import and export limitations for nearly each country). Usually, it varies from 64 to 256 bits. To use more bits, it is obligatory to ask permission from authorities.

但是建议使用1024位密钥为RSA最小！
这是不是意味着我不能只使用RSA没有任何问题的法律等等。

But it is recommended to use 1024 bits keys for RSA as minimum! Does it mean that I cannot just use RSA without any problems with law and so on?

推荐答案

位长度限制在64位范围内隐含地涉及对称加密。对于像RSA这样的非对称加密通常有单独的比特长度限制（例如，1998年放宽了出口控制，允许导出高达56比特的对称加密和高达1024比特的非对称加密）。

Bit length restrictions in the 64 bit range are implicitly relating to symmetric crypto. There are usually separate bit length restrictions for asymmetric crypto like RSA (for example, the 1998 relaxation of export controls in the US allowed export of symmetric crypto of up to 56 bits and asymmetric crypto of up to 1024 bits).

64位RSA加密将在分钟小于一秒内是可中断的。

64 bit RSA encryption would be breakable in minutes less than a second.

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