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1.1 root 1: .th CRYPT I 10/23/71
2: .sh NAME
3: crypt \*- encode/decode
4: .sh SYNOPSIS
5: .bd crypt
6: [ password ]
7: .sh DESCRIPTION
8: .it crypt
9: is an exact implementation of Boris Hagelin's
10: cryptographic machine called the M-209 by the U. S. Army [1].
11: .s3
12: .it crypt
13: reads from the standard input file and writes
14: on the standard output.
15: It is thus suitable for use as a filter.
16: For a given password, the encryption
17: process is idempotent;
18: that is,
19: .s3
20: .bd " crypt znorkle <clear >cypher"
21: .br
22: .bd " crypt znorkle <cypher"
23: .s3
24: will print the clear.
25: .sh "SEE ALSO"
26: [1] U. S. Patent 2,089,603.
27: .sh BUGS
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