Ertugrul =?UTF-8?B?U8O2eWxlbWV6?=

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Re: what is RSA keylength the length of?

Unruh <unruh-spam@physics.ubc.ca> wrote:

> > People talk about "the key length" in discussions of the RSA algorithm.

> >

> > In learning about it at a textbook level I know that an RSA key is a

> > pair of integers. (One is used as a power to exponentiate a value

> > and ususally labeled e or d, the other as a divisor to then divide

> > the result usually labeled n.)

>

> NO. The pair of integers are two primes which are multiplied together

> to give n. the exponents e and d are easily computed from those. e is

> usually only about 6 bits long. d is roughly the same size as n.

Actually, Daniel is right. The modulus alone doesn't make a useful RSA

key. The modulus together with an exponent does. That would be a pair

of integers (he didn't talk about primes).

Regards,

Ertugrul.

--

http://ertes.de/

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