This publication titled "Computer Security and Databases" deals with the issues related to computer security and insecurity. An introductory overview of secure coding and access control is provided, so is details about capability-based and cloud computing security. Special focus lies on computer security model and cyber security standards. The elements and dimensions of internet privacy, network security, cyber defense and security architecture are described. An overview of database management system is given. The data security model and object database are described. The computer database storage, transaction, replication and security are discussed. The role of antivirus software in computer security is reflected upon briefly. Focus also lies on computer data hierarchy, store, database design and theory. CONTENTS: Computer Security and Insecurity: An Introductory Overview; Secure Coding, Access Control, Capability-based and Cloud Computing Security; Special Focus on Computer Security Model and Cyber Security Standards; Special Focus on Internet Privacy, Network Security, Cyber Defense and Security Architecture; Database Management System, Data Security, Model and Object Database: An Overview; Focus on Computer Database Storage, Transaction, Replication and Security; Role of Antivirus Softwares in Computer Security; Special Focus on Computer Data Hierarchy, Store, Database Design and Theory.