Security review

Data Validation

Checks that the data entered is reasonable.

An example of data validation

Range checking, which ensures that the data falls within a specified range.

Data Verification

Checks that the data entered is the same as the original.

An example of data verification

Double entry, where the data is entered twice and checked for consistency.

Firewall

A security measure that controls incoming and outgoing network traffic based on security rules.

Additional Security Measure

Antivirus software, which detects and removes malicious software.

Source Code Encryption

It converts the source code into a secure format that is unreadable without a decryption key.

Data Backup

Creates a copy of data to restore it after a loss.

Disk Mirroring

Creates an exact copy of the data on a secondary drive, providing real-time data redundancy.

Difference between Security and Privacy

Security refers to protecting data against unauthorized access, while privacy concerns the proper use of consumer data.

Non-physical Security Method 1

Firewalls that monitor and control incoming and outgoing network traffic.

Non-physical Security Method 2

Encryption which secures data making it unreadable to unauthorized users.

Parity Block Check

It identifies corrupted bits by adding a parity bit that indicates whether the number of set bits is even or odd.

Situation where Parity Block Check fails

When two bits are corrupted, the parity may remain the same, leading to no error being detected.

Security Method 1

Regularly updating software to patch vulnerabilities.

Security Method 2

Using strong passwords and changing them regularly.

Integrity Method

Hashing, which ensures that data has not been altered by producing a unique hash value.