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List:       ms-cryptoapi
Subject:    Re: Encrypting with public key
From:       Bronislav Kavsan <bkavsan () IRE-MA ! COM>
Date:       1998-01-27 21:38:45
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These "problems" shouldn't be attributed to MS CryptoAPI, but rather to MS CSPs.
There are other CSPs out there (ours is one of them) that allow Public Key
encryption.

Bob Denny wrote:

> Pardon me profusely if this has changed since last September...
>
> John Boyer wrote:
> >I am wondering if someone else out there has done this or tried to get CAPI
> >to do [RSA encryption/decryption]
>
> Yes. And I ran into a brick wall. Microsoft's RSA license apparently
> forbids them from exposing RSA encryption and decryption in their API. It
> may be used for key exchange and digital signatures, but it must be
> encapsulated in such a way that API clients cannot use RSA directly. I was
> told by Microsoft that CAPI 2 does not provide direct access to RSA
> operations.
>
> >Is it much slower, or could this be one reason why CAPI doesn't bother with
> >public key encryption of bulk data?
>
> It's a reason, but not _the_ reason. RSA is slow(er than xxx), yes, but I
> can think of situations where it would be useful for direct data encryption
> as opposed to using it for a complex key-exchange phase followed by some
> small transfer of payload data.
>
> >Why would there be a legality issue over public key encryption of bulk data?
>
> Because Microsoft would have to pay RSA more money to become legally able
> to expose it.
>
>   -- Bob
>
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--
Bronislav Kavsan
IRE Secure Solutions, Inc.
100 Conifer Hill Drive  Suite 513
Danvers, MA  01923
voice: 978-739-2384
http://www.ire.com

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