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Re: Simple but mathematically valid encryption

To: REALbasic NUG <realbasic-nug at lists dot realsoftware dot com>
Subject: Re: Simple but mathematically valid encryption
From: Stefan Pantke <seaside dot ki at mac dot com>
Date: Thu, 30 Dec 2004 21:41:40 +0100
Delivered-to: realbasic-nug at lists dot realsoftware dot com
References: <880ECA18-5A75-11D9-81BF-000A27B1C8AE at elfdata dot com> <E3911502-5A7B-11D9-81BF-000A27B1C8AE at elfdata dot com> <5CBE4A08-5A81-11D9-BA8A-000A957CB4CC at desuetude dot com> <D132E5AC-5A86-11D9-863A-000A9585ABA2 at mac dot com> <6 dot 1 dot 0 dot 6 dot 2 dot 20041230092440 dot 03d6dd78 at mail1 dot netreach dot net>

Am 30. Dez 2004 um 18:27 schrieb Leonard Rosenthol:

At 09:18 AM 12/30/2004, Stefan Pantke wrote:
RSA and Blowfish represent entirely different classes of encryption algorithms, and are not suitable for the same problems.

Details available?

Blowfish (RC4, etc.) are symmetric algorithms used to encrypt data with a single key that is shared between the parties via (hopefully) a secure "out of band" channel.

RSA is one class of public key encryption (asymmetic) algorithms that allow for the encryption of data using a pair of keys - one private and one public. In this case, the data is encrypted with the use's public key (which is ALWAYS shared) and can then ONLY be decrypted with the matching private key (which is NEVER shared). Thus allowing for data sharing w/o any "a priori" communication.

Oh, you meant this.

I expected, supposed you meant something else like speed, applicability to
specific areas e.g. crypting of streams of data or crypting of blacks.

Thx,
sp

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