Cyber forensics is a critical component of modern technology and the digital landscape. The need for cyber forensics arises due to the increasing number of cybercrime and digital security incidents. Some of the key reasons for the need for cyber forensics include:

1. Investigation of Cybercrime: Cybercrime is a growing concern, and cyber forensics is essential in the investigation of these crimes. It provides a systematic method of collecting, preserving, analyzing, and presenting digital evidence in a court of law.
2. Data Preservation: In the event of a cyber-attack, digital evidence can be quickly altered or destroyed. Cyber forensics helps in preserving digital evidence to ensure that it can be used for investigations and legal proceedings.
3. Evidence Collection: Cyber forensics helps in collecting evidence from digital devices, such as computers, smartphones, and other digital storage devices. This evidence can be used to identify the perpetrators and bring them to justice.
4. Incident Response: In the event of a cyber-incident, cyber forensics plays a critical role in responding to the incident. It helps in identifying the cause of the incident, the extent of the damage, and the steps required to prevent future incidents.
5. Compliance: In many industries, organizations are required to comply with regulations and standards that require them to maintain a certain level of digital security. Cyber forensics helps organizations meet these requirements by ensuring that they have proper incident response and evidence collection procedures in place.

Overall, cyber forensics is crucial in ensuring the security of digital devices, networks, and systems and in investigating and prosecuting cybercrime.