{"id":820,"date":"2021-01-17T05:40:20","date_gmt":"2021-01-16T18:06:46","guid":{"rendered":"https:\/\/exampracticetests.com\/ISC\/SSCP\/systems-security-certified-practitioner-sscp-question0812\/"},"modified":"2021-01-17T05:44:43","modified_gmt":"2021-01-17T05:44:43","slug":"systems-security-certified-practitioner-sscp-question0812","status":"publish","type":"post","link":"https:\/\/exampracticetests.com\/ISC\/SSCP\/systems-security-certified-practitioner-sscp-question0812\/","title":{"rendered":"Systems Security Certified Practitioner &#8211; SSCP &#8211; Question0812"},"content":{"rendered":"<div class=\"question\">Which of the following BEST describes a function relying on a shared secret key that is used along with a hashing algorithm to verify the integrity of the communication content as well as the sender? <br \/><strong><br \/>A.<\/strong> Message Authentication Code -MAC <br \/><strong>B.<\/strong> PAM -Pluggable Authentication Module <br \/><strong>C.<\/strong> NAM -Negative Acknowledgement Message <br \/><strong>D.<\/strong> Digital Signature Certificate<\/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\">\nThe purpose of a message authentication code -MAC is to verify both the source and message integrity without the need for additional processes.<br \/>\nA MAC algorithm, sometimes called a keyed (cryptographic) hash function (however, cryptographic hash function is only one of the possible ways to generate MACs), accepts as input a secret key and an arbitrary-length message to be authenticated, and outputs a MAC (sometimes known as a tag). The MAC value protects both a message&#8217;s data integrity as well as its authenticity, by allowing verifiers (who also possess the secret key) to detect any changes to the message content.<br \/>\nMACs differ from digital signatures as MAC values are both generated and verified using the same secret key. This implies that the sender and receiver of a message must agree on the same key before initiating communications, as is the case with symmetric encryption. For the same reason, MACs do not provide the property of non-repudiation offered by signatures specifically in the case of a network-wide shared secret key: any user who can verify a MAC is also capable of generating MACs for other messages.<br \/>\nIn contrast, a digital signature is generated using the private key of a key pair, which is asymmetric encryption. Since this private key is only accessible to its holder, a digital signature proves that a document was signed by none other than that holder. Thus, digital signatures do offer non-repudiation.<br \/>\nThe following answers are incorrect:<br \/>\nPAM -Pluggable Authentication Module: This isn&#8217;t the right answer. There is no known message authentication function called a PAM. However, a pluggable authentication module (PAM) is a mechanism to integrate multiple low-level authentication schemes and commonly used within the Linux Operating System.<br \/>\nNAM -Negative Acknowledgement Message: This isn&#8217;t the right answer. There is no known message authentication function called a NAM. The proper term for a negative acknowledgement is NAK, it is a signal used in digital communications to ensure that data is received with a minimum of errors.<br \/>\nDigital Signature Certificate: This isn&#8217;t right. As it is explained and contrasted in the explanations provided above.<br \/>\nThe following reference(s) was used to create this question:<br \/>\nThe CCCure Computer Based Tutorial for Security+, you can subscribe at <a href=\"http:\/\/www.cccure.tv\" title=\"External link\" rel=\"nofollow noopener\" target=\"_blank\">http:\/\/www.cccure.tv<\/a> and <a href=\"http:\/\/en.wikipedia.org\/wiki\/Message_authentication_code\" title=\"External link\" rel=\"nofollow noopener\" target=\"_blank\">http:\/\/en.wikipedia.org\/wiki\/Message_authentication_code<\/a><\/div>\n<p><\/strong><\/span> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following BEST describes a function relying on a shared secret key that is used along with a hashing algorithm to verify the integrity of the communication content as well as the sender? A. Message Authentication Code -MAC B. PAM -Pluggable Authentication Module C. NAM -Negative Acknowledgement Message D. Digital Signature Certificate Show [&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":[1078,815,3],"class_list":["post-820","post","type-post","status-publish","format-standard","hentry","category-systems-security-certified-practitioner-sscp","tag-choices","tag-question-0812","tag-systems-security-certified-practitioner-sscp"],"_links":{"self":[{"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/posts\/820","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=820"}],"version-history":[{"count":1,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/posts\/820\/revisions"}],"predecessor-version":[{"id":1896,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/posts\/820\/revisions\/1896"}],"wp:attachment":[{"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/media?parent=820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/categories?post=820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exampracticetests.com\/ISC\/SSCP\/wp-json\/wp\/v2\/tags?post=820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}