IPSec VPNs use pre-shared keys, ( ) and digital envelopes to authenticate peers. (fill in the blank)

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In symmetric encryption algorithms, the ________ algorithm is used over a data communication channel, browser or network link.[fill in the blank]*

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Evidence identification needs to solve the integrity verification of evidence and determine if it meets the standards that can be used. Regarding the standards of evidence identification, which of the following statement is correct?

• A.Objective standard refers to the acquisition, storage, and submission of electronic evidences shall be legal, and the basic rights such as national interests, social welfare and personal privacy do not constitute strict violations.
• B.Relevance standard refers to that if the electronic evidence can have a material impact on the facts of the case to a certain extent, the court should rule that it is relevant.
• C.Legality standard is to ensure that electronic evidence is collected from the initial acquisition, and the content is not changed in the process of submission as litigation evidence.
• D.Fair standard refers to that only the legal subject obtains the evidentiary material by legal means has evidentiary ability.

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Using the _____ method of the web proxy, the virtual gateway encrypts the real URL that the user wants to access and can adapt to different terminal types.

• A.Web rewriting

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Which of the following options are the key elements of information security protection? (Multiple Choice)

• A.Security products and technologies
• B.Safe operation and maintenance and management
• C.Asset management
• D.Personnel

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