The solution will address the findings that the development team used a new software language that was not supported by the security team's automated assessment tools and the security assessment team was unfamiliar with the new language and struggled to evaluate the software during advanced testing. The training of the security assessment team and working with the automated assessment-tool vendor to add support for the new language will ensure that future deployments of the new technology are secure and the vulnerabilities are detected and prevented.

The software development life cycle (SDLC) is a process that consists of several phases that guide the development of software applications or systems. Security should be involved in every phase of the SDLC, but especially in the planning phase, which is the first phase where the scope, objectives, requirements, and resources of the project are defined. By involving security in the planning phase, potential risks and threats can be identified and mitigated early in the process, which can save time, money, and effort later on. Design, maintenance, implementation, analysis, and testing are other phases of the SDLC, but they are not the first phase where security should be involved. Reference: https://www.bmc.com/blogs/software-development-life-cycle-phases/

DKIM, or DomainKeys Identified Mail, is an email authentication method that uses a digital signature to let the receiver of an email know that the message was sent and authorized by the owner of a domain1 DKIM helps prevent phishing emails that spoof or impersonate other domains by verifying the identity and integrity of the sender. DKIM works by adding a DKIM signature header to each outgoing email message, which contains a hash value of selected parts of the message and the domain name of the sender. The sender's domain also publishes a public key in its DNS records, which can be used by the receiver to decrypt the DKIM signature and compare it with its own hash value of the message. If they match, it means that the message was not altered in transit and that it came from the claimed domain.

PII (Personally Identifiable Information) is any information that can be used to identify, contact, or locate a specific individual, either by itself or when combined with other information1. PII by itself is information that can uniquely identify an individual without any additional information. Examples of PII by itself are:
Government ID. A government ID is a number or code that is issued by a government authority to an individual for identification purposes. Examples of government IDs are social security numbers, passport numbers, driver's license numbers, etc. A government ID can uniquely identify an individual without any additional information.
Birth certificate. A birth certificate is a document that records the birth of an individual and contains information such as name, date of birth, place of birth, parents' names, etc. A birth certificate can uniquely identify an individual without any additional information.
Other examples of PII by itself are biometric data, DNA profile, fingerprints, etc. Examples of information that are not PII by themselves are:
Job title. A job title is a name or description of a position or role in an organization. A job title does not uniquely identify an individual without any additional information, as many individuals can have the same job title.
Employment start date. An employment start date is the date when an individual began working for an organization. An employment start date does not uniquely identify an individual without any additional information, as many individuals can have the same employment start date.
Employer address. An employer address is the location of an organization where an individual works. An employer address does not uniquely identify an individual without any additional information, as many individuals can work at the same employer address.
Mother's maiden name. A mother's maiden name is the surname that a woman had before she married. A mother's maiden name does not uniquely identify an individual without any additional information, as many individuals can have the same mother's maiden name.
Other examples of information that are not PII by themselves are gender, race, ethnicity, age, etc.

Reporting processes are important to include when updating an incident response plan after a breach for several reasons. Two of the most likely reasons are:
To meet regulatory requirements for timely reporting. Many regulations and standards require organizations to report security incidents or breaches within a certain time frame or face penalties or sanctions. For example, the General Data Protection Regulation (GDPR) requires organizations to report personal data breaches within 72 hours of becoming aware of them. Reporting processes can help organizations to comply with these requirements by defining who, what, when, where, how, and why to report incidents or breaches.
To limit reputation damage caused by the breach. Security incidents or breaches can have negative impacts on an organization's reputation, trust, and customer loyalty. Reporting processes can help organizations to limit these impacts by communicating effectively and transparently with internal and external stakeholders, such as employees, customers, partners, regulators, media, and public. Reporting processes can help organizations to provide accurate and consistent information about the breach, its causes, impacts, and remediation actions.
Other possible reasons to include reporting processes when updating an incident response plan after a breach are:
To establish a clear chain of command (A). Reporting processes can help organizations to establish a clear chain of command for incident response by defining roles and responsibilities, escalation procedures, and decision-making authority.
To remediate vulnerabilities that led to the breach (D). Reporting processes can help organizations to remediate vulnerabilities that led to the breach by documenting and analyzing the root causes, lessons learned, and best practices for improvement.
To isolate potential insider threats (E). Reporting processes can help organizations to isolate potential insider threats by monitoring and auditing user activities, behaviors, and access rights before, during, and after the breach.