Preventing Insider Record Tampering With Permission Restrictions

SY0-701 By islever Editorial Last updated

Given a scenario, implement and maintain identity and access management. Compare and contrast concepts and strategies to protect data. Given a scenario, select mitigation techniques or controls to secure an enterprise environment.

Short answer

A Permission restrictions best secure company records by enforcing least privilege so the marketing insider cannot alter financial records or transfer funds.

Question

A malicious insider from the marketing team alters records and transfers company funds to a personal account. Which of the following methods would be the best way to secure company records in the future?
  1. Permission restrictions Correct Answer
  2. Hashing
  3. Input validation
  4. Access control list

Key Takeaways

The question tests preventive authorization versus detective integrity checking, and its main trap is choosing hashing because the records were changed.

This scenario tests how to prevent a malicious marketing insider from altering company records and moving funds. The answer is A: permission restrictions enforce least privilege and block unauthorized writes and transfers at the authorization check.

Common mistake: Choosing B, hashing, because the records were altered; hashing can reveal tampering after the fact but cannot stop an insider who already holds write or transfer permission.

Expert Analysis

The control point is authorization, not detection

In this scenario the marketing insider is already an authenticated user. The damaging step is not malformed input; it is the authorization decision that lets that account modify financial records and initiate or influence a transfer. Trace the path: the user authenticates, requests a write to a record or a funds-transfer action, and the system checks whether that identity has the required permission. If marketing has read-only access to financial records and cannot approve or execute transfers, the request is denied at that check. Permission restrictions (A) implement least privilege and separation of duties at exactly that point, so they prevent the alteration rather than merely record it.

Why hashing is the wrong lever

Hashing (B) is an integrity-detection mechanism. A stored hash changes if a record is altered, which can reveal tampering after the fact, but it does not stop a user who already has write permission from making the change. One commenter made this point directly: hashing makes sure data has not been tampered with; it does not prevent tampering. The question asks how to secure records in the future, so the preventive authorization control is stronger than a detective checksum.

Input validation and ACLs

Input validation (C) constrains the format, length, or range of data entered into an application. It can stop injection or malformed values, but a malicious insider modifying a legitimate record is not necessarily sending invalid input. An ACL (D) is a concrete list of permissions on an object and can be part of the solution, but the broader and more exam-aligned answer is permission restrictions: role-appropriate limitations across files, folders, systems, and transaction functions. An ACL alone may be a narrow file-level list that does not enforce separation of duties for fund transfers.

Verdict

The best method is A, permission restrictions, because it denies the insider the ability to alter records or move funds in the first place. Hashing only detects changes; input validation checks data shape; an ACL is an implementation detail that is narrower than the control objective.

Exam Strategy

For insider-threat questions, separate prevention from detection. Ask whether the control stops the action before it occurs or only records evidence afterward; permission restrictions and least privilege are preventive, while hashing is detective. When both a broad control objective (permission restrictions) and a specific mechanism (ACL) appear, prefer the option that directly enforces role-appropriate authorization across records and transactions, not one narrow file-level list.

Frequently Asked Questions

Why are permission restrictions better than hashing for stopping a malicious insider?

Permission restrictions block the write or transfer action before it happens by checking the user's authorization. Hashing only produces a new checksum after data changes, so it can detect tampering but not prevent it.

Does an access control list (ACL) solve the same problem as permission restrictions?

An ACL can implement object-level permissions, but it is a narrower mechanism and may not enforce role separation across financial records and fund-transfer functions. The broader control is least-privilege permission restriction.

What should be restricted to prevent an insider from transferring company funds?

Restrict financial-system write, approval, and transfer permissions to specific roles, and separate duties so the person who alters records cannot also approve or execute the transfer.

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Discussion 5 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 5

  1. Fourgehan 👍 5 Answered A
    Permission restrictions are a security mechanism that limits what actions users or groups can perform on data or systems. By implementing strict permission restrictions, the company can ensure that only authorized personnel have access to sensitive records and financial systems, minimizing the risk of insider threats
  2. 9149f41 👍 5 Answered A
    While ACLs can help, permission restrictions are a broader and more effective approach for securing company records against insider threats. Permission restriction can be applied on the file, folder and drive as well, which is more effective.
  3. Philco 👍 1 Answered B
    B. Hashing (Correct): The core security issue described here is a violation of data integrity—the insider is maliciously changing existing data. A hashing algorithm takes data of an arbitrary length and outputs a fixed-size, unique string of characters (a checksum). If even a single character or digit within those financial records is altered, the resulting hash value will change completely. By periodically generating and checking hashes against a known-good baseline, the company can immediately detect unauthorized changes to their records.
  4. pchuu 👍 1
    The answer is not hashing as hashing does not secure data.Hashing makes sure that data has not been tampered with. It does not prevent tampering so that cannot be the answer. The issue is that the malicious insider had access and permissions to make the changes so permissions need to be restricted. The answer is A
  5. VoidDrive 👍 1 Answered B
    ACLs and permission restrictions are only useful against a non-insider threat. The only useful thing would be hashing to detect the change. Kind of a junk question though.

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