Re: Non-expert's encryption question
From: Bill Unruh (unruh@physics.ubc.ca)Date: 01/31/02
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From: unruh@physics.ubc.ca (Bill Unruh) Date: 31 Jan 2002 01:19:20 GMT
In <3C586FE5.F650DCD9@triumf.ca> Joseph Mildenberger <Joe.Mildenberger@triumf.ca> writes:
]I ask this question as a largely ignorant user of scp/ssh, and of
]encryption in general. I understand, or at least think I so, the need
]for encrypting passwords and other private user-related info. But for
]most of the work I do, I don't really care whether the _content_ of
]stuff I ship across the internet is encrypted or not: there's no
]personal/private/proprietary information involved . For small amounts of
]data the encryption/decryption probably does not add significantly to
]the transfer time. However, there are occasions when I need to move
]around GB's of binary data from our particle physics experiments. In
]this case, I believe that the encryptions/decryption causes a big
]overhead in the transfer time; at least, this is what it seems to me
]when I recall the relatively fast transfers in the free and easy - and,
]alas, bygone - days of ftp. And, it is all entirely pointless, as far as
]I am concerned, as the unencrypted data would be just as meaningless in
]the hands of "bad guys" as the encrypted data.
] So my question, or actually, several questions, are:
]1. Am I just imagining it that transfering large amounts of data via scp
]is much slower it would be using ftp?
]2. If it _is_ really slower, is there some configuration of scp/ssh
]whereby the password and other sensitive "hand-saking" info. is
]encrypted, but the rest of the (non-sensitive).
]3. If it is not possible to entirely turn off encryption, can one do
]anything to speed things up?
Get and install srp. It is a secure password exchange and allows you to decide
if you want to encrypt as well. (Its password security is higher than ssh as it
idoes bilateral verification.)
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