SKEYINIT(1)

NAME
skeyinit - change password or add user to S/Key authentication system

SYNOPSIS
skeyinit [-s] [-z] [-n count] [ -md4 | -md5 | -sha1 | -rmd160] [user]

DESCRIPTION
skeyinit initializes the system so you can use S/Key one-time passwords to login. The program will ask you to enter a secret pass phrase; enter a phrase of several words in response. After the S/Key database has been updated you can login using either your regular password or using S/Key one-time passwords.

skeyinit requires you to type a secret password, so it should be used only on a secure terminal. For example, on the console of a workstation or over an encrypted network session. If you are using skeyinit while logged in over an untrusted network, follow the instructions given below with the -s option.

Before initializing an S/Key entry, the user must authenticate using either a standard password or an S/Key challenge. When used over an untrusted network, a password of ‘s/key’ should be used. The user will then be presented with the standard S/Key challenge and allowed to proceed if it is correct.

The options are as follows:

-x  Displays pass phrase in hexadecimal instead of ASCII.

-s  Set secure mode where the user is expected to have used a secure machine to generate the first one-time password. Without the -s option the system will assume you are directly connected over secure communications and prompt you for your secret password. The -s option also allows one to set the seed and count for complete control of the parameters. You can use skeyinit -s in combination with the skey command to set the seed and count if you do not like the defaults. To do this run skeyinit in one window and put in your count and seed, then run skey in another window to generate the correct 6 English words for that count and seed. You can then "cut-and-paste" or type the words into the skeyinit window.

-z  Allows the user to zero their S/Key entry.

-n count
    Start the skey sequence at count (default is 100).

-md4
    Selects MD4 as the hash algorithm.

-md5
    Selects MD5 as the hash algorithm.

-sha1
    Selects SHA (NIST Secure Hash Algorithm Revision 1) as the hash algorithm.

-rmd160
    Selects RMD-160 (160 bit Ripe Message Digest) as the hash algorithm.

user
    The username to be changed/added. By default the current user is operated on.

ERRORS

skey disabled
    /etc/skeykeys does not exist. It must be created by the superuser in order to use skeyinit.

FILES

/etc/skeykeys
    database of information for S/Key system

SEE ALSO
skey(1)

AUTHORS
Phil Karn, Neil M. Haller, John S. Walden, Scott Chasin