In this thesis, we propose architecture for a SaaS model in Cloud that would provide service to the financial investors who are not familiar with various mathematical models. Such finance models are used to evaluate financial instruments, for example, to price a derivative that is currently being traded before entering into a contact. An investor may approach CSP to price a particular derivative and specify the time, budget and accuracy constraints. Based on these constraints specified by investors, the service provider will compute the option value using our proposed FSM. To evaluate our proposed model, we compared pricing results with the classical model that provides a closed-form solution for option pricing to meet the accuracy constraints. After establishing the accuracy of our pricing results, we further ensured that the SLA between the FSP and the investors is honoured by meeting the constraints put forth by the investor who uses the Cloud service.

In this thesis, we propose architecture for a SaaS model in Cloud that would provide service to the financial investors who are not familiar with various mathematical models. Such finance models are used to evaluate financial instruments, for example, to price a derivative that is currently being traded before entering into a contact. An investor may approach CSP to price a particular derivative and specify the time, budget and accuracy constraints. Based on these constraints specified by investors, the service provider will compute the option value using our proposed FSM. To evaluate our proposed model, we compared pricing results with the classical model that provides a closed-form solution for option pricing to meet the accuracy constraints. After establishing the accuracy of our pricing results, we further ensured that the SLA between the FSP and the investors is honoured by meeting the constraints put forth by the investor who uses the Cloud service.

Cloud computing brought flexibility, scalability, and capital cost savings to the IT industry. As more companies turn to cloud solutions, securing cloud based services becomes increasingly important, because for many organizations, the final barrier to adopting cloud computing is whether it is sufficiently secure. More users rely on cloud storage as it is mainly because cloud storage is available to be used by multiple devices (e.g. smart phones, tablets, notebooks, etc.) at the same time. These services often offer adequate protection to user's private data. However, there were cases where user's private data was accessible to other users, since this data is stored in a multi-tenant environment. These incidents reduce the trust of cloud storage service providers, hence there is a need to securely migrate data from one cloud storage provider to another. This thesis proposes a design of a service for providing Security as a Service for cloud brokers in a federated cloud. This scheme allows customers to securely migrate from one provider to another. To enable the design of this scheme, possible security and privacy risks of a cloud storage service were analysed and identified. Moreover, in order to successfully protect private data, data protection requirements (for data retention, sanitization, and processing) were analysed. The proposed service scheme utilizes various encryption techniques and also includes identity and key management mechanisms, such as "federated identity management". While our proposed design meets most of the defined security and privacy requirements, it is still unknown how to properly handle data sanitization, to meet data protection requirements, and provide users data recovery capabilities (backups, versioning, etc.). / Cloud computing erbjuder flexibilitet, skalbarhet, och kapital kostnadsbesparingar till IT-industrin. Eftersom fler företag vänder sig till moln lösningar, trygga molntjänster blir allt viktigare, eftersom det för många organisationer, det slutliga hindret att anta cloud computing är om det är tillräckligt säkert. Fler användare förlita sig påmoln lagring som det är främst pågrund moln lagring är tillgängligt att användas av flera enheter (t.ex. smarta telefoner, tabletter, bärbara datorer, etc.) påsamtidigt. Dessa tjänster erbjuder ofta tillräckligt skydd för användarens privata data. Men det fanns fall där användarens privata uppgifter var tillgängliga för andra användare, eftersom denna data lagras i en flera hyresgäster miljö. Dessa händelser minskar förtroende molnleverantörer lagring tjänsteleverantörer, därför finns det ett behov av att säkert migrera data från en moln lagring till en annan. Denna avhandling föreslår en utformning av en tjänst för att erbjuda säkerhet som tjänst för molnmäklare i en federativ moln. Detta system gör det möjligt för kunderna att säkert flytta från en leverantör till en annan. För att möjliggöra utformningen av detta system, möjliga säkerhet och risker integritet av ett moln lagring tjänst har analyserats och identifierats. Dessutom att man framgångsrikt skydda privata uppgifter, dataskydd krav (för data retention, sanering och bearbetning) analyserades. Den föreslagna tjänsten systemet utnyttjar olika krypteringsteknik och även inkluderar identitet och nyckelhantering mekanismer, såsom "federerad identitetshantering". Även om vår föreslagna utformningen uppfyller de flesta av den definierade säkerhet och integritet krav, är det fortfarande okänt hur korrekt hantera data sanering, för att uppfyller kraven för dataskydd och ge användarna data recovery kapacitet (säkerhetskopior, versionshantering osv.)