cat aboutthisdir
This directory contains an interrelated set of functions which  implement
string arithmetic (fixed length 13 decimal digits) functions and use these
to realize functions that are useful for public key encryption tasks.
The two primary packages are mastersearch.c and rsa.c
Using mastersearch, a user can generate a public key masterkey and the
encryption/decryption keys needed to go with this. Using rsa.c the
sender and receiver of information to be public key encrypted or decrypted
can set up with the keys and then transform messages to and from plaintext
and or ciphertext.
The major effort on the contents of this directory was to insure a consistent
set of functions which every one of the several application programs could
use, much as they would library functions. Also, there was a distinct effort
to eliminate any duplication of source code.  Every function that is used
more than once is separated from the main() segment and cat is used to
merge the program segments together when they are needed.
There are user friendly aspects of this code which has not been attended
These will be the subject for later work.

John M. Bailey
May 3, 1987
$ ls -l
total 110
-rw-r--r--  1 jmb      bailey       1156 May  6  1987 aboutthisdir
-r--r--r--  1 jmb      bailey        503 May  6  1987 euc.f
-r--r--r--  1 jmb      bailey       1675 May  6  1987 inv.f
-rwxr-xr-x  1 jmb      bailey      19236 May  6  1987 inverter
-r--r--r--  1 jmb      bailey        751 May  6  1987 inverter.c
-rw-r--r--  1 jmb      bailey       2644 May  6  1987 inverter4.f
-rwxr-xr-x  1 jmb      bailey      21400 May  6  1987 mastersearch
-r--r--r--  1 jmb      bailey       2098 May  6  1987 mastersearch.c
-rw-r--r--  1 jmb      bailey       1972 Feb  7 17:09 mastersearch.o
-r--r--r--  1 jmb      bailey       3265 May  6  1987 mathset.f
-r--r--r--  1 jmb      bailey        882 May  6  1987 prime.f
-rwxr-xr-x  1 jmb      bailey      18612 May  6  1987 primesearch
-r--r--r--  1 jmb      bailey        489 May  6  1987 primesearch.c
-rwxr-xr-x  1 jmb      bailey      17876 May  6  1987 rsa
-r--r--r--  1 jmb      bailey       1250 May  6  1987 rsa.c
-r--r--r--  1 jmb      bailey        330 May  6  1987 rsa.f
-r--r--r--  1 jmb      bailey        905 May  6  1987 search.f
-rw-r--r--  1 jmb      bailey       9155 May  6  1987 source.c
$ file *
aboutthisdir:   ascii text
euc.f:          c program text
inv.f:          c program text
inverter:       read-only text (non coff) not stripped
inverter.c:     c program text
inverter4.f:    English text
mastersearch:   read-only text (non coff) not stripped
mastersearch.c: c program text
mastersearch.o: pure executable not stripped
mathset.f:      c program text
prime.f:        c program text
primesearch:    read-only text (non coff) not stripped
primesearch.c:  c program text
rsa:            read-only text (non coff) not stripped
rsa.c:          c program text
rsa.f:          c program text
search.f:       c program text
source.c:       c program text
$