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version 1.2, 1996/06/26 05:39:19

version 1.3, 1996/09/27 15:41:36

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.Nm S/key

is a procedure for using one time passwords to authenticate access to

computer systems. It uses 64 bits of information transformed by the

MD4 algorithm. The user supplies the 64 bits in the form of 6 English

MD4 and MD5 algorithms. The user supplies the 64 bits in the form of 6

words that are generated by a secure computer.

English words that are generated by a secure computer.

Example use of the S/key program

.Xr skey 1 :

.sp

Line 24

OMEN US HORN OMIT BACK AHOY

.sp 0

.Pp

The options are as follows:

.Bl -tag -width Ds

.It Fl x

causes output to be in hexidecimal instead of ASCII.

.It Fl 4

Selects MD4 as the hash algorithm.

.It Fl 5

Selects MD5 as the hash algorithm.

.It Fl n Ar count

Prints out

.Ar count

one time passwords. The default is to print one.

.It Fl p Ar password

Uses

.Ar password

as the secret password. Use of this option is discouraged as

your secret password could be visible in a process listing.

.El

.Pp

The programs that are part of the S/Key system are:

.Bl -tag -width skeyinit...