Different Security services and Security mechanisms are given below.S. No.   Security Services                     S. No.    Security Mechanism      Authentication                              1.    Encipherment      Access Control                              2.    Digital Signature     Confidentiality                               3.    Authentication Exchange     Data Integrity                                4.    Access Control     Non-repudiation                           5.    Routing Control     Availability                                     6.    Data IntegrityWhich is incorrect relationship between security services and security mechanisms?Group of answer choices1 – 1, 2 - 4, 3 – 1, 4 – 1, 5 - 2, 6 – 3.1 – 2, 2 - 4, 3 – 5, 4 – 1, 5 - 2, 6 – 6.1 – 3, 2 - 4, 3 – 1, 4 – 6, 5 - 2, 6 – 31 – 4, 2 - 4, 3 – 2, 4 – 6, 5 - 2, 6 – 6.

Question 4Which statement best describes Authentication?1 pointAssurance that a resource can be accessed and usedProtection against denial by one of the parties in communicationAssurance that the communicating entity is the one claimedPrevention of unauthorized use of a resource5.Question 5Trusted functionality, security labels, event detection, security audit trails and security recovery are all examples of which type of security mechanism?1 pointContingent security mechanismExternal security mechanismActive security mechanismPassive security mechanism

Which of the following is an important security requirement for a system that provides authentication services for critical applications or devices?Group of answer choicesAuthenticityIntegrityConfidentialityAvailability

Explain Various Security Services

a) Security is a big challenge in e-commerce due to the fact that e-commerce is carriedout via the Internet. Giving examples, discuss four security services that any esecurity system must provide. (4 Marks)

Which of the following security service cannot be ensured by Encipherment: