{"id":814,"date":"2021-01-17T05:40:13","date_gmt":"2021-01-16T18:06:40","guid":{"rendered":"https:\/\/exampracticetests.com\/ISC\/SSCP\/systems-security-certified-practitioner-sscp-question0806\/"},"modified":"2021-01-17T05:44:42","modified_gmt":"2021-01-17T05:44:42","slug":"systems-security-certified-practitioner-sscp-question0806","status":"publish","type":"post","link":"https:\/\/exampracticetests.com\/ISC\/SSCP\/systems-security-certified-practitioner-sscp-question0806\/","title":{"rendered":"Systems Security Certified Practitioner &#8211; SSCP &#8211; Question0806"},"content":{"rendered":"<div class=\"question\">When we encrypt or decrypt data there is a basic operation involving ones and zeros where they are compared in a process that looks something like this:<br \/>\n0101 0001 Plain text 0111 0011 Key stream 0010 0010 Output<br \/>\nWhat is this cryptographic operation called? <br \/><strong><br \/>A.<\/strong> Exclusive-OR <br \/><strong>B.<\/strong> Bit Swapping <br \/><strong>C.<\/strong> Logical-NOR <br \/><strong>D.<\/strong> Decryption<\/div>\n<p><\/p>\n<style> .hidden-div{ display:none } <\/style>\n<p>\t\t\t\t\t\t\t<button onclick=\"getElementById('hidden-div').style.display = 'block'\"> Show Answer <\/button> <button onclick=\"getElementById('hidden-div').style.display = 'none'\">Hide Answer<\/button><\/p>\n<div class=\"hidden-div\" id=\"hidden-div\"><span style=\"\"><\/p>\n<div class=\"answer\">Correct Answer: <strong>A<\/strong><\/div>\n<p><strong>Explanation:<\/strong> <\/p>\n<div class=\"explanation\">\nWhen we encrypt data we are basically taking the plaintext information and applying some key material or keystream and conducting something called an XOR or Exclusive-OR operation.<br \/>\nThe symbol used for XOR is the following: \u2295 This is a type of cipher known as a stream cipher.<br \/>\nThe operation looks like this: 0101 0001 Plain text 0111 0011 Key stream 0010 0010 Output (ciphertext)<br \/>\nAs you can see, it&#8217;s not simple addition and the XOR Operation uses something called a truth table that explains why 0+1=1 and 1+1=0.<br \/>\nThe rules are simples, if both bits are the same the result is zero, if both bits are not the same the result is one.<br \/>\nThe following answers are incorrect:<br \/>\n-Bit Swapping: Incorrect. This isn&#8217;t a known cryptographic operations.<br \/>\n-Logical NOR: Sorry, this isn&#8217;t correct but is where only 0+0=1. All other combinations of 1+1, 1+0 equals 0. More on NOR here.<br \/>\n-Decryption: Sorry, this is the opposite of the process of encryption or, the process of applying the keystream to the plaintext to get the resulting encrypted text.<br \/>\nThe following reference(s) was used to create this question:<br \/>\nFor more details on XOR and all other Qs of cryptography. Subscribe to our holistic Security+ CBT tutorial at http:\/\/ www.cccure.tv and <a href=\"http:\/\/en.wikipedia.org\/wiki\/Exclusive-or\" title=\"External link\" rel=\"nofollow noopener\" target=\"_blank\">http:\/\/en.wikipedia.org\/wiki\/Exclusive-or<\/a> and <a href=\"http:\/\/en.wikipedia.org\/wiki\/Stream_cipher\" title=\"External link\" rel=\"nofollow noopener\" target=\"_blank\">http:\/\/en.wikipedia.org\/wiki\/Stream_cipher<\/a><\/div>\n<p><\/strong><\/span> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>When we encrypt or decrypt data there is a basic operation involving ones and zeros where they are compared in a process that looks something like this: 0101 0001 Plain text 0111 0011 Key stream 0010 0010 Output What is this cryptographic operation called? A. Exclusive-OR B. Bit Swapping C. Logical-NOR D. Decryption Show Answer [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[1078,809,3],"class_list":["post-814","post","type-post","status-publish","format-standard","hentry","category-systems-security-certified-practitioner-sscp","tag-choices","tag-question-0806","tag-systems-security-certified-practitioner-sscp"],"_links":{"self":[{"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/posts\/814","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/comments?post=814"}],"version-history":[{"count":1,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/posts\/814\/revisions"}],"predecessor-version":[{"id":1890,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/posts\/814\/revisions\/1890"}],"wp:attachment":[{"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/media?parent=814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/categories?post=814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/tags?post=814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}