| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 59.1 | | SUMMIT::NOBLE | | Mon Mar 11 1985 12:59 | 3 |
| re: ZOO=PEE + 10=ADD + 25
ADD + 25=ZCC ; please identify what a zcc is
|
| 59.2 | | SPRITE::OSMAN | | Tue Mar 12 1985 10:02 | 26 |
|
Uh . . .
. . . er . . .
. . . Oh !
It should be "ODD" instead of "ADD". My mistake.
sorry :(
|
| 59.3 | | SUMMIT::NOBLE | | Tue Mar 12 1985 12:53 | 3 |
| Then again, if I had subtracted back the other way, I would have
been able to figure it out. Thank you.
|
| 59.4 | Meaning of LALLAN | GENRAL::JHUGHES | NOTE, learn, and inwardly digest | Thu Oct 09 1986 20:38 | 9 |
| Re .0:
> PEPPER = LALLAN + 4 (I hope LALLAN is a word. I don't know what
it means)
Well, I recognized LALLANS as defining the variety of English spoken
in the southeast of Scotland, checked with Webster's and found:
"Lallan (or lalland) - Scot var of Lowland"
|
| 59.5 | What's it called? | IPG::REEVE | Tim Reeve, REO-D/4-2, DTN: 830-6061 | Tue Apr 05 1988 19:51 | 3 |
| Could someone do me a favour? For the last few months, I've been
trying to remember the name of this procedure, i.e. IBM - 1 = HAL.
Please? Thanks. Maybe I'll get a good night's sleep now.
|
| 59.6 | Is this what you wanted? | ZFC::DERAMO | Trust me. I know what I'm doing. | Wed Apr 06 1988 00:43 | 16 |
| In the study of cryptography, I think the term "Caesar shift" is
applied to the method of "rotating" letters of the alphabet by the
same amount. It may mean more specifically the rotation A -> D,
B -> E, etc., that Julius Caesar was supposed to have used.
In at least one electronic mail network, certain messages like
potentially offensive jokes, movie reviews that gave away the
ending, and answers to challenge questions, were subjected to
"rot13" -- where each letter is rotated halfway around the alphabet.
The mail routines had this built in to it. Eric mentioned "rot3"
in .0.
I don't know if this is what you were asking, or if there are
more widely known "name of this procedure"'s.
Dan
|
| 59.7 | that's what it is ... | MARKER::KALLIS | Why is everyone getting uptight? | Wed Apr 06 1988 16:22 | 12 |
| Re .6 (Dan):
>In the study of cryptography, I think the term "Caesar shift" is
>applied to the method of "rotating" letters of the alphabet by the
>same amount.
The correct term, FWIW, is "Caesar substitution." Technically,
it started out as a three-character shift, but is generally used
by cryptologists to mean and shift of a nonscrambled alphabet.
And Julius Caesar did indeed use it.
Steve Kallis, Jr.
|
| 59.8 | in numbers... | GNUVAX::BOBBITT | modem butterfly | Wed Apr 06 1988 18:19 | 10 |
| in math, when you base a counting system on something other than
10, it is called "modulo X" (where X is the radix or basis for the
system).
Perhaps if you base an alphabet one letter later, it would be "Modulo
B", or one letter earlier, it would be "Modulo Z"
(assuming the standard is "modulo A")
-Jody
|
| 59.9 | Mod, you know | SSDEVO::GOLDSTEIN | | Thu Apr 07 1988 02:12 | 19 |
| Re: .8
> in math, when you base a counting system on something other than
> 10, it is called "modulo X" (where X is the radix or basis for
> the system).
You are confusing two different mathematical concepts. The radix
or base of the decimal system is indeed 10, just as 2 is radix of
the binary system. This, however, is independent of the concept
of 'modulo 10' or 'modulo 2'. Mathematicians refer to "arithmatic
modulo n," (sometimes called "clock arithmatic"). It is the arithmatic
obtained by using only the integers 0, 1, 2, . . . n-1 and defining
addition and multiplication by letting the sum a+b and the product
ab be the remainder after division by n of the ordinary sum and
product of a and b. One may have in the decimal system, for instance,
arithmatic modulo n, where n is _any_ integer in the system. Modulo
arithmatic in the decimal system is not limited to modulo 10.
Bernie
|
| 59.10 | What did Ceasar use it for? | HOMSIC::DUDEK | It's a Bowser eat Bowser world | Mon Apr 11 1988 19:14 | 1 |
|
|
| 59.11 | | MARKER::KALLIS | Why is everyone getting uptight? | Mon Apr 11 1988 19:51 | 17 |
| Re .10:
> -< What did Ceasar use it for? >-
Military communications. The Caesar substitution is quite easily
solved nowadays, but apparently he (hence, the Romans) thought it
secure enough.
Another cryptological method of the time was the "skytale," on
which a ribbon was would spirally around a cylinder of a certain
diameter, then a message was written on the surface; then it was
unwound and rolled up. The characters were supposed to be meaningless
to anyone unless they had a cylinder of the same diameter on which
the thing could be rewound. [The characters would naturally fall
into place, whereupon the message could be reread.]
Steve Kallis, Jr.
|
| 59.12 | lets bring this up to date... | ELIS::SOBOT | | Thu May 04 1995 09:17 | 8 |
|
WNT = VMS + 1
I wonder if Mr. Cutler (who created both operating systems, I
believe) did this deliberately :-)
Cheers, Steve
|
| 59.13 | | NOVA::FISHER | now |a|n|a|l|o|g| | Tue May 09 1995 08:53 | 4 |
| it has been reported that Mr. Cutler, when informed of that
equation, replied "What took you so long?"
ed
|
| 59.14 | | JRDV04::DIAMOND | segmentation fault (california dumped) | Wed May 10 1995 17:47 | 9 |
| >"What took you so long?"
And the answer is that the person was waiting for the previous
command to complete, because VMS doesn't have the equivalent of
BSD's Control-Z and bg command.
(Of course WNT's other predecessor is worse but, as can be
observed from a glance at the equation, said other predecessor
doesn't count.)
|