...Lab Assignment #1: Introduction to Encryption Algorithms CSEC 630 University of Maryland University College Professor Jingyu Zhang 1. Which tool or technique would be most effective for a cryptanalyst to use to decipher a text encrypted with the Caesar cipher, and why? The best analysis tool to break the Caesar cipher is histogram because it performs a statistical analysis on cipher text which shows the frequency of each letter used in the file. This can later be compared and matched to the frequency of letters in the English language. 2. What do you notice about the histogram results when text is encrypted with the Vigenère cipher in comparison to the results of the Caesar cipher? Why is this the case? Histogram simply gives the frequency of each individual letter in cipher text without taking the plaintext into consideration. Since in Caesar cipher the relationship between plaintext and cipher text is one to one, histogram is more efficient to break the cipher. Since the key in vigenere is somewhat random the histogram shown below seems random as well. 3. There is an error in the following cipher text representation of this quote, what is it? The original unencrypted message is: TH ED IF FE RE NC EB ET WE EN ST UP ID IT YA ND GE NI US IS TH AT GE NI US HA SI TS LI MI TS The original encrypted message is: THE CORRECT CIPHERTEXT SD AH FO HL AR ST RE AS YL BS CI MQ TF NI VE TG HB SN QC NC SD TD HB SN QC DE CN IC IF OT IC This is the error example: SD...
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...CSEC 630 Mac Virtual Lab Access Instructions Part I - Downloading, Installing and Connecting the CISCO VPN Client 1. a. Type https://vpn.csvcl.net in the address bar of your browser b. Type your assigned username and password and click Login in the Login box 2. To connect to he VPN for the first time, click Start AnyConnect - If you get the warning as seen above about the Java plu-in, please click Trust to move forward. You may notice the two windows below. Please, click on run in the warning window to continue. 3. When you get to this the window above, click on “Mac OS X 10.6+ (Intel)” to download the installer of the VPN client. - The installer will be downloaded to your default download location 4. Navigate to your default download location and locate the downloaded “anyconnect…-k9.dmg” file. Then, start the installation process of the client. - Once you locate the “.dmg” file, lunch it and a temporary drive will be created on your desktop. Access the “AnyConnect VPN 3.xxxx” drive and lunch the “vpn.pkg” file that it contains. - Once the “vnp.pkg” file is lunched you will be guided through the installation process as indicated in the window above. 5. Once the installation process has completed, locate the “Cisco” folder in the “Applications” folder and lunch the “Cisco AnyConnect Secure Mobility Client” . - Once lunched, you’ll be prompted to enter the address, “vpn.csvcl.net”, in the box below. - Once you type the address...
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...CARIBBEAN EXAMINATIONS COUNCIL Caribbean Secondary Education Certificate CSEC® CHEMISTRY SYLLABUS Effective for examinations from May–June 2015 CXC 21/G/SYLL 13 Published by the Caribbean Examinations Council. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form, or by any means electronic, photocopying, recording or otherwise without prior permission of the author or publisher. Correspondence related to the syllabus should be addressed to: The Pro-Registrar Caribbean Examinations Council Caenwood Centre 37 Arnold Road, Kingston 5, Jamaica Telephone Number: + 1 (876) 630-5200 Facsimile Number: + 1 (876) 967-4972 E-mail Address: cxcwzo@cxc.org Website: www.cxc.org Copyright © 2013 by Caribbean Examinations Council The Garrison, St Michael BB14038, Barbados CXC 21/G/SYLL 13 Contents RATIONALE ................................................................................................................................... AIMS ............................................................................................................................................. CANDIDATE POPULATION ............................................................................................................. SUGGESTED TIME-TABLE ALLOCATION ........................................................................................ ORGANISATION OF THE SYLLABUS .................................................
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...CARIBBEAN EXAMINATIONS COUNCIL Caribbean Secondary Education Certificate CSEC ® INFORMATION TECHNOLOGY SYLLABUS Effective for examinations from May/June 2010 C XC 30/G /S YLL 08 1 Published by the Caribbean Examinations Council All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form, or by any means electronic, photocopying, recording or otherwise without prior permission of the author or publisher. Correspondence related to the syllabus should be addressed to: The Pro-Registrar Caribbean Examinations Council Caenwood Centre 37 Arnold Road, Kingston 5, Jamaica, W.I. Telephone: (876) 630-5200 Facsimile Number: (876) 967-4972 E-mail address: cxcwzo@cxc.org Website: www.cxc.org Copyright © 2008, by Caribbean Examinations Council The Garrison, St Michael BB14038, Barbados CXC 30/G/SYLL 08 Contents RATIONALE .............................................................................................................................................. AIMS ...................................................................................................................................................... 1 2 2 2 3 4 5 5 7 7 8 10 12 13 15 16 19 21 23 46 47 ORGANIZATION OF THE SYLLABUS .................................................................................................. SUGGESTED TIME-TABLE ALLOCATION .......................................................................................... FORMAT...
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