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# 9th grade homework help: encoding & decoding using a key matrix

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**17**replies

**5**views Edited

**Nov 21, 2006**

Okay, I basically need to:

"Convert letters to numbers using the replacement code of A=1, B=2, C=3... Y=25, Z=26, =0.

Using a 2 by 2 key matrix, encrypt your message"

I've gotten to the point where I (for example) have:

o(15) v(22) e(05) r(18) a(01) c(03) h(08) i(09) e(05) v(22) e(05) r(18)

152205180103080905220518

Now, what do I do with it? Am I supposed to use each number and multiply (scale) it by the martix and find the determinant or what...? I just have no idea. M book says nothing, and I can't really find anything on google. If anyone knows or has any helpul links, it would be great. This is due next Tuesday, but I need to get it done by this Wedneday. Alright, thanks.

"Convert letters to numbers using the replacement code of A=1, B=2, C=3... Y=25, Z=26, =0.

Using a 2 by 2 key matrix, encrypt your message"

I've gotten to the point where I (for example) have:

o(15) v(22) e(05) r(18) a(01) c(03) h(08) i(09) e(05) v(22) e(05) r(18)

152205180103080905220518

Now, what do I do with it? Am I supposed to use each number and multiply (scale) it by the martix and find the determinant or what...? I just have no idea. M book says nothing, and I can't really find anything on google. If anyone knows or has any helpul links, it would be great. This is due next Tuesday, but I need to get it done by this Wedneday. Alright, thanks.

I Only Post Everything

Registered: 03/21/2005

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## Re: 9th grade homework help: encoding & decoding using a key matrix

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Nov 21, 2006

I just had this HW too, although I had it in the form of a project.

What we had to do was take the numbers and put them in groups of matricies, then multiply each of those by the "key" matrix.

-------------------

PS3 || Currently Playing: WarHawk

What we had to do was take the numbers and put them in groups of matricies, then multiply each of those by the "key" matrix.

-------------------

PS3 || Currently Playing: WarHawk

## Re: 9th grade homework help: encoding & decoding using a key matrix

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Nov 21, 2006

overachiever wrote:

Okay, I basically need to:

"Convert letters to numbers using the replacement code of A=1, B=2, C=3... Y=25, Z=26, =0.

Using a 2 by 2 key matrix, encrypt your message"

I've gotten to the point where I (for example) have:

o(15) v(22) e(05) r(18) a(01) c(03) h(08) i(09) e(05) v(22) e(05) r(18)

152205180103080905220518

Now, what do I do with it? Am I supposed to use each number and multiply (scale) it by the martix and find the determinant or what...? I just have no idea. M book says nothing, and I can't really find anything on google. If anyone knows or has any helpul links, it would be great. This is due next Tuesday, but I need to get it done by this Wedneday. Alright, thanks.

Matrices are

so can you at least bother to do this?

"I loooove you, but what are we going to do?."Ike Turner is the man.

olvidala mejor olvidala,

arrancala de ti que ya tiene otro amor

olvidala mejor olvidala,

arrancala de ti ve y busca otra ilusion

es que no dejan los recuerdos

si yo le ense��e a amar, fui su primer amor

no sale de mi pensamiento

aun ella vive aqui dentro del corazon

olvidala mejor olvidala,

arrancala de ti que ya tiene otro amor

olvidala mejor olvidala,

arrancala de ti ve y busca otra ilusion

es que no dejan los recuerdos

si yo le ense��e a amar, fui su primer amor

no sale de mi pensamiento

aun ella vive aqui dentro del corazon

Treasure Hunter

Registered: 03/01/2006

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6056 posts

## Re: 9th grade homework help: encoding & decoding using a key matrix

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Nov 21, 2006

**Im not sure because the student teacher lost me durring this already this year, but I think you multiply them by your scale and leave them in 1 x 2 matrices. I really don't know though.**

## Re: 9th grade homework help: encoding & decoding using a key matrix

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Nov 21, 2006

yep but he is making it so confusing though .

-RKO- wrote:

I just had this HW too, although I had it in the form of a project.What we had to do was take the numbers and put them in groups of matricies, then multiply each of those by the "key" matrix. Shade knows this

"I loooove you, but what are we going to do?."Ike Turner is the man.

olvidala mejor olvidala,

arrancala de ti que ya tiene otro amor

olvidala mejor olvidala,

arrancala de ti ve y busca otra ilusion

es que no dejan los recuerdos

si yo le ense��e a amar, fui su primer amor

no sale de mi pensamiento

aun ella vive aqui dentro del corazon

olvidala mejor olvidala,

arrancala de ti que ya tiene otro amor

olvidala mejor olvidala,

arrancala de ti ve y busca otra ilusion

es que no dejan los recuerdos

si yo le ense��e a amar, fui su primer amor

no sale de mi pensamiento

aun ella vive aqui dentro del corazon

Treasure Hunter

Registered: 03/01/2006

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6056 posts

## Re: 9th grade homework help: encoding & decoding using a key matrix

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Nov 21, 2006

-ShaDe- wrote:

overachiever wrote:

Okay, I basically need to:

"Convert letters to numbers using the replacement code of A=1, B=2, C=3... Y=25, Z=26, =0.

Using a 2 by 2 key matrix, encrypt your message"

I've gotten to the point where I (for example) have:

o(15) v(22) e(05) r(18) a(01) c(03) h(08) i(09) e(05) v(22) e(05) r(18)

152205180103080905220518

Now, what do I do with it? Am I supposed to use each number and multiply (scale) it by the martix and find the determinant or what...? I just have no idea. M book says nothing, and I can't really find anything on google. If anyone knows or has any helpul links, it would be great. This is due next Tuesday, but I need to get it done by this Wedneday. Alright, thanks.

Matrices are

so can you at least bother to do this?

**You messed it up, noob. He is using a 2 x 2 matrix (most likely) and then it would leave them in 1 x 2 matrices, not 1 x 3.**

Keyblade Wielder

Registered: 04/20/2005

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10305 posts

## Re: 9th grade homework help: encoding & decoding using a key matrix

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Nov 21, 2006

overachiever wrote:

Okay, I basically need to:

"Convert letters to numbers using the replacement code of A=1, B=2, C=3... Y=25, Z=26, =0.

Using a 2 by 2 key matrix, encrypt your message"

I've gotten to the point where I (for example) have:

o(15) v(22) e(05) r(18) a(01) c(03) h(08) i(09) e(05) v(22) e(05) r(18)

152205180103080905220518

Now, what do I do with it? Am I supposed to use each number and multiply (scale) it by the martix and find the determinant or what...? I just have no idea. M book says nothing, and I can't really find anything on google. If anyone knows or has any helpul links, it would be great. This is due next Tuesday, but I need to get it done by this Wedneday. Alright, thanks.

.

WAIT A MINUTE LMAO NEVERMIND...that says overachiever...thats your name...lmao

Message Edited by swattkidd on 11-20-2006 05:39 PM

Message Edited by swattkidd on 11-20-2006 05:41 PM

Treasure Hunter

Registered: 07/05/2005

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## Re: 9th grade homework help: encoding & decoding using a key matrix

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Nov 21, 2006

OHHHHHHHHHHHH!!!! overacheiver sees now! So, we divide them up like that and then multiply. That's what I thought it might have been, but I wasn't really sure. Then we just leave the matrix that we get raw? (and then decode it again on a seperate sheet of paper for the other fourth of the project); Okay, thanks alot.

By the way, mine was a project too. Maybe we're in the same school system. AACPS?

By the way, mine was a project too. Maybe we're in the same school system. AACPS?

-RKO- wrote:

I just had this HW too, although I had it in the form of a project.

What we had to do was take the numbers and put them in groups of matricies, then multiply each of those by the "key" matrix.

## Re: 9th grade homework help: encoding & decoding using a key matrix

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Nov 21, 2006

sigh Did you even bother to see this was an example for him to use the but oh well whatever rows your boat.

Im confused. wrote:

-ShaDe- wrote:

overachiever wrote:

Okay, I basically need to:

"Convert letters to numbers using the replacement code of A=1, B=2, C=3... Y=25, Z=26, =0.

Using a 2 by 2 key matrix, encrypt your message"

I've gotten to the point where I (for example) have:

o(15) v(22) e(05) r(18) a(01) c(03) h(08) i(09) e(05) v(22) e(05) r(18)

152205180103080905220518

Now, what do I do with it? Am I supposed to use each number and multiply (scale) it by the martix and find the determinant or what...? I just have no idea. M book says nothing, and I can't really find anything on google. If anyone knows or has any helpul links, it would be great. This is due next Tuesday, but I need to get it done by this Wedneday. Alright, thanks.

Matrices are

so can you at least bother to do this?You messed it up, noob. He is using a 2 x 2 matrix (most likely) and then it would leave them in 1 x 2 matrices, not 1 x 3.

Message Edited by -ShaDe- on 11-20-2006 05:44 PM

"I loooove you, but what are we going to do?."Ike Turner is the man.

olvidala mejor olvidala,

arrancala de ti que ya tiene otro amor

olvidala mejor olvidala,

arrancala de ti ve y busca otra ilusion

es que no dejan los recuerdos

si yo le ense��e a amar, fui su primer amor

no sale de mi pensamiento

aun ella vive aqui dentro del corazon

olvidala mejor olvidala,

arrancala de ti que ya tiene otro amor

olvidala mejor olvidala,

arrancala de ti ve y busca otra ilusion

es que no dejan los recuerdos

si yo le ense��e a amar, fui su primer amor

no sale de mi pensamiento

aun ella vive aqui dentro del corazon