Comptia Security+, Security, Technology

Security+ Course – 6.3 Asymmetric Cryptography

1. Rivest-Shamir-Adleman (RSA) Asymmetric cryptography solves issues of scalability by giving each user a pair of keys for use in encryption and decryption operations. The RSA algorithm was one of the earliest asymmetric cryptographic algorithms and it is still used today. It was published in 1977. There’s a lot of complex maths involved in creating that key pair, but the…

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Comptia Security+, Security, Technology

Security+ Course – 6.2 Symmetric Cryptography

1. Data Encryption Standard (DES) DES was designed by IBM in the 1970’s Intended to serve as a federal encryption standard. Up until that point different agencies used different encryption algorithms. This caused issues with security because all of those algorithms weren’t thoroughly tested, and interoperability because different agencies couldn’t easily communicate with each other How DES Works DES uses…

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Comptia Security+, Security, Technology

Security+ Course – 6.1 Encryption

1. Understanding Encryption Cryptography is the use of mathematical algorithms to transform information into a form that is not readable by unauthorised individuals. Cryptography does, however, provide authorised individuals with the ability to transform that encrypted information back into readable form. Encryption: converts information from its plaintext form into an encrypted version that is unreadable. This is known as ciphertext…

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Comptia Security+, Security, Technology

Security+ Course – 5.5 Forensics

1. Conducting Investigations There are four main types of investigations that often involve cybersecurity professionals. These are: 1. Operational investigations: Seek to resolve technology issues (EG: service might be returning errors, a server might be responding too slowly, or a network might be congested) Restore normal operations as quickly as possible low standards of evidence as no legal action involved…

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Comptia Security+, Security, Technology

Security+ Course – 5.4 Incident Response

1. Security Incidents Security Incident Terminology Security Event: these occur anytime that an observable action takes place on a system that has security implications. This may be a user accessing a web page, a file being written to disk by a process, a connection being established through a firewall, or any other security related event. Thousands of security events take…

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Comptia Security+, Security, Technology

Security+ Course – 5.3 Business Continuity and Disaster Recovery

1. Business Continuity Planning Business continuity efforts are a collection of activities designed to keep a business running in the face of adversity. This adversity may come in the form of a small-scaled incident such as a single system failure or a catastrophic incident, such as an earthquake or tornado. Business continuity plans may also be activated by man-made disasters…

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Comptia Security+, Security, Technology

Security+ Course – 5.2 Supply Chain Risks

1. Managing Vendor Relationships Security professionals must pay careful attention to managing these vendor relationships in a way that protects the confidentiality, integrity, and availability of their organisation’s information and IT systems. This is known as Supply Chain Assessment. Perhaps, the most important rule of thumb is that you should always ensure that vendors follow security policies and procedures that…

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Comptia Security+, Security, Technology

Security+ Course – 4.4 Account Management

1. Understanding account and privilege management Account Management Tasks: implement the principles of least privilege: An individual should only have the minimum set of privileges necessary to complete their assigned job duties Implement separation of duties: Performing sensitive actions should require the collaboration of two individuals implementing job rotation schemes: regularly move people between jobs to prevent fraud managing the…

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