a couple of question about authentication and encryption and SSH configuration??

From: wld (aaabbb16_at_hotmail.com)
Date: 09/27/04 

Date: 27 Sep 2004 03:23:07 -0700

Hi,
First I like comfirm a "out of topic" question.
What I understand for authentication and encryption for RADIUS
is that 3DES or DES for encryption and MD5 is for authtication.
Is correct?

Today I have read SSH FAQ
For the authentication:
 SSHv1 support RSA only
 SSHv2 support DSA only
For the encryption
 both sshv1 and sshv2 support 3DES.

but i did not see any config. related to 3DES during ssh
configuration.
only public and private key mentioned.
what is diff. between RSA and DSA?
How do public and private key work under SSH ?
I am trying to login a switch using ssh
the switch generated key as following(this switch can not upload key):

ssh-dss AAAAB3NzaC1kc3MAAACBANJVZdo6+8mSeeMRdmJ6SJOVG2P52BdK++uTO0XuwLbUyKXo6cVWALrfVO5SnvS836JQJtdP+BwePED3oS
E/vm9xV/o/K5eSV1C3AdF2x3rXNyjZHKxEVa5hJ0nleNf5kzPv1N0mBuiEzOQbKefQQ+lWOHlsjhGm68bo608CwMITAAAAFQCzG3mJ7Xjj7bTt
Y6KKN5LYOjv57QAAAIEAwInPZsD7oRb2uzE6aIEFRHj9HwZ2X+A8M1rNdzIqV8PtSvl9N1C9atVBHOp/T8jDdonle1z+Ap92/gkoM10QWMIHBh
W4/5wRV2JMjG5XdyiRFCt3oo13r2Ssq2YUs9hc4BTu/rnBW5AtMQHI/UGMiUORiWFRuruzYOUW06FLwWEAAACADbe/MtteZjEy+3XC7o9o1rpi
5+8OFlAYpW+1B/0In++ysLEuvNL5XSp6kWy3Kwg2fp+PLnHBqy8lRQRGVftGlga0VH9Zym8f+Eju9Keu7jZ4335vkjAGHLIt/MKVQoJ252V4Ys
ThlAQwdtKTxkOjQrnJ0X4x2GJ0Vw2ww222Rbw=

Key Type: DSA 1024 (used by SSH v2)
Fingerprint: xozes-degut-koroh-ritef-nuvoh-nalam-leguk-tagob-zeros-zygys-poxox
             87:4a:fa:f9:b0:c9:34:67:0a:aa:7f:41:be:51:a7:9f

1024 65537 152919549579672429038159167081198131620736321424142483719560090415764116228264011408153096671265569
71624965983326502635166651080953411079375814655774059664403795169907820346342623107085205707175230466943252135
3420441064375696428398356548127684604786632097461345255337062625874229820066637907045469392300869339

Key Type: RSA 1024 (used by SSH v1)
Fingerprint: xetop-tezup-gaboh-pebel-rurez-fimyc-kulid-desup-rumiz-vyzog-tixix
             b7:b1:8f:52:26:32:80:e8:d5:4e:4c:fc:a3:2e:7e:49

It looks like three parts for this key.
1.ssh-dss
2.DSA fingerprint plus a string numbers. (??)
3.RSA fingerprint only

Can anyone explain this key?

I use PuTTY as a client.
How can i config ssh based on above info.

Thanks a lot,
Steven young

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