Post on 27-Dec-2015
Go to
http://illuminations.nctm.org/LessonDetail.aspx?id=L396
READ the DIRECTIONS
Try Path 1 and Path 2Then figure out the shortest path to the
pond
Website on piece of paper at your desk
How to program the shortest path
Press “clear” to eraseTo create a new path,
adjust the length by using the blue sliderspress the "forward", "back", or "turn" buttons
to have it placed in the programming areaClick “draw” to make it draw
Cryptography?
Answers to our take home packet Selection of prizes
"Cowards die many times before their deaths; the valiant never taste of death but once."
What numbers occur most frequently in the ciphertext?
Frequency analysis is the process by which the frequency of a letter in an encoded messages is compared with the frequency of letters in English words.
What numbers occur most frequently in the ciphertext?
For instance, the letter E occurs most often in English words, so if the letter W occurs most often in ciphertext, then it is likely that E has been replaced by W.
See Handout
Using the Frequency Table Decode this Message
TFNRIUJ UZV DREP KZDVJ SVWFIV KYVZI UVRKYJ; KYV MRCZREK EVMVI KRJKV FW UVRKY SLK FETV.
Which letter is used the most?
Using the Frequency Table Decode this Message
TFNRIUJ UZV DREP KZDVJ SVWFIV KYVZI UVRKYJ; KYV MRCZREK EVMVI KRJKV FW UVRKY SLK FETV.
Which letter is used the most?
Using the Frequency Table Decode this Message
TFNRIUJ UZV DREP KZDVJ SVWFIV KYVZI UVRKYJ; KYV MRCZREK EVMVI KRJKV FW UVRKY SLK FETV.
Which letter is used the most? The next most used letter?
Using the Frequency Table Decode this Message
TFNRIUJ UZV DREP KZDVJ SVWFIV KYVZI UVRKYJ; KYV MRCZREK EVMVI KRJKV FW UVRKY SLK FETV.
Which letter is used the most? The next most used letter?
Realign
A B C D E F G H I J K L M N O P K R S T U V W X Y Z
J K L M N O PQ R S T U V W X Y Z A B C D E F G H I
l "Cowards die many times before their deaths; the valiant never taste of death but once."
Caesar Cipher
Caesar Cipher
English
Coded
Caesar Cipher Starter
Caesar Cipher Starter
Standard Alphabet:A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Caesar Alphabet:
X Y Z A B C D E F G H I J K L M N O P Q R S T U V W
Caesar Cipher Starter answers
Message OnePMFBP PBKA PBZOBQ JBPPXDBP.SPIES SEND SECRET MESSAGES.
Message TwoQEB XOJV FP LK QEB JLSB.THE ARMY IS ON THE MOVE.
Message ThreeQELJXP GBCCBOPLK ABPFDKBA X PRYPQFQRQFLK ZFMEBO.THOMAS JEFFERSON DESIGNED A SUBSTITUTION CIPHER.
Easy Decode
Easy Decode Answers
Can You
Read This
Secret
Message
Intermediate Decode
Intermediate Decode
Message OneUJTUQJ FQQ FWTZSI YMJ BTWQI QNPJ YT XTQAJ UZEEQJX.
Hint: HINT: Look for a pattern that would fit the word "PEOPLE."
UJTUQJ FQQ FWTZSI YMJ BTWQI QNPJ YT XTQAJ UZEEQJX.
Intermediate Decode
Hint: HINT: Look for a pattern that would fit the word "PEOPLE."
UJTUQJ FQQ FWTZSI YMJ BTWQI QNPJ YT XTQAJ UZEEQJX.
Try converting UJTUQJ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
V W X Y Z A B C D E F G H I J K L M N O P Q R S T U FQQ using the same code would = all
Set UJTUQJ = PEOPLE
Intermediate Decode
Try converting FWTZSI
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
K L MN O P Q R S T U V W X Y Z A B C D E F G H I J
Since it doesn’t match, you know the other is correct
Intermediate Decode Answers
Message OneUJTUQJ FQQ FWTZSI YMJ BTWQI QNPJ YT XTQAJ UZEEQJX.
People All Around The World Like To Solve Puzzles.
Intermediate #2
Message TwoMIGY JOTTFYM WUH VY BULX NI MIFPY, VON MIGY ULY YUMS.
HINT: The word "SOME" appears twice in this sentence.
Intermediate #2
Message TwoMIGY JOTTFYM WUH VY BULX NI MIFPY, VON MIGY ULY YUMS.
HINT: The word "SOME" appears twice in this sentence.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
G H I J K L M N O P Q R S T U V W X Y Z A B C D E F Let MIGY= SOME
Intermediate #2
Message TwoMIGY JOTTFYM WUH VY BULX NI MIFPY, VON MIGY ULY YUMS.
Some Puzzles Can Bb Hard To Solve, But Some Are Easy.
Intermediate #3
Message ThreeQVQ LBH GUVAX GUNG GUVF CHMMYR JNF UNEQ BE RNFL GB QB?
Intermediate #3
Message ThreeQVQ LBH GUVAX GUNG GUVF CHMMYR JNF UNEQ BE RNFL GB QB?
HINT: Three words in a row begin with "TH."
Intermediate #3
Message ThreeQVQ LBH GUVAX GUNG GUVF CHMMYR JNF UNEQ BE RNFL GB QB?
HINT: Three words in a row begin with "TH.“
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
N O P Q R S T U V W X Y Z A B C D E F G H I J K L M
Let GU = TH
Intermediate #3
Message ThreeQVQ LBH GUVAX GUNG GUVF CHMMYR JNF UNEQ BE RNFL GB QB?
Did You Think That This Puzzle Was Hard Or Easy To Do?
Advanced
Message1. LHKUFXKUL, J LXYIRU ETMMRU KJD NU KJQU TE HV LUOUBJR EJBFL.
2. KEON MEGS FCHS IK HBWRKJ QX BGJKG SB OBFK SB E OBFMWKSK HBWCSQBX.
3. VGT OANRV UZNV WO VGAR UFKKBT AR RWBHADX VGT LNQUVWXNZCR VGT CRTBHTR.
4. IMQC XRK TKOC AMCMWTDIM CBM FMXNRWA KOMA CR TDQ CBM PHZBPGMC.
5. TNUJTH, HKA QAUJ ZRLAFX KAJ JCX SKFW AUXW ZKF JCX UXJJROL.
Advanced: Step 1Decode each sentence
LHKUFXKUL, J LXYIRU ETMMRU KJD NU KJQU TE HV LUOUBJR EJBFL.
The give away is the letter “J” –what are the only stand alone letters/words in the English language I or A
Advanced: Step 1Decode each sentence
LHKUFXKUL, J LXYIRU ETMMRU KJD NU KJQU TE HV LUOUBJR EJBFL.
Set J = IA B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Z A B C D E F G H I J K L M N O P Q R S T U V W X Y
Pick something to test. For example does TE = SD make sense?
Advanced: Step 1Decode each sentence
LHKUFXKUL, J LXYIRU ETMMRU KJD NU KJQU TE HV LUOUBJR EJBFL.
Set J = AA B C D E F G H I J K L M N O P Q R S T U V W X Y Z
R S T U V WX Y Z A B C D E F G H I J K L M N O PQ
Pick something to test. For example does TE = KV make sense?
Making Interactive PPT and EXCEL
Examples of Excel
In Excel
Secret MessagesPlot the Secret Location
Answers:
Secret messages
Plot the location
See Handouts for Directions
Interactive PPT
Examples of PPT
Remainder of Time Visit
America's Crypto Kids (K-12)National Security Agency (NSA)http://www.nsa.gov/kids/
CIA Kids’ Page (K-12)Central Intelligence Agency (CIA)https://www.cia.gov/kids-page/index.htmlFBI Kids’ PageFederal Bureau of Investigation (FBI)http://www.fbi.gov/fbikids.htm
Future StateU.S. Department of Stateshttp://www.future.state.gov/
Ready KidsDepartment of Homeland Securityhttp://www.ready.gov/kids/home.html
http://www.eschoolnews.tv/http://cryptoclub.math.uic.edu/
shiftcipher/shiftcipher.htm