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Mobile Application for Encrypted Calls
Jonáš, Jiří ; Malina, Lukáš (referee) ; Hajný, Jan (advisor)
The thesis is focused on implementation of aplication for secure telephone communication on data network. Application is developed for operating system Android. For call management is responsible signaling protocol SIP and for transfer of voice data is used protocol RTP. For security of call is first created cryptografic key for symetric cryptography. After generating key is established call, which is encrypted by symetric cipher AES. Encrypting between communicating sides is provided in application or on microSD card. Part of solution is measurement of speed of cryptographic primitives, which are used for secure call.
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Advanced security applications for Android
Orgoň, Marek ; Malina, Lukáš (referee) ; Hajný, Jan (advisor)
The thesis deals with security of the Android operating system, both general security features and options for storing sensitive data. The suitability of Android KeyStore for storing sensitive data and the possibility of using the secure element for safe application calculations and smart card emulation are discussed. Using Host-based Card Emulation for contactless smart card emulation is discussed. The performance analysis of modular arithmetic operations for numbers with high bit length is examined. Following these analysis, an implementation of application for software contactless smart card emulation of HM12 and HM14 cryptographic protocol is proposed. And an implementation of application for verifying smart cards with these protocols is proposed. Also scheme for secure storage of sensitive data is proposed.
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NFC payments using mobile phone
Kalousová, Pavlína ; Luc, Ladislav (advisor) ; Veber, Jaromír (referee)
This bachelor thesis is focused on the current trend in usability of mobile phones which is paying contactless at merchants using NFC. The beginning of this thesis is aimed at explaining basic terminology, business model, current market share of mobile operating systems and technologies such as NFC, Secure Element, Host Card Emulation and tokenization. This part is followed by categorizing and describing different applications for contactless payments in Czech Republic. These applications can be viewed as applications released by certain banks (bank applications) or by other companies (nonbank applications, often connected to a specific operating system). Part of this thesis is also aimed towards wearables and potential future development regarding contactless payments in Czech Republic. Main goal of this thesis is to analyse different applications based on predetermined criteria. Conclusion of this analysis is used to fulfill the goal of this bachelor thesis which is identifying the most advantageous applications. Last objective of this thesis is to sum up a list of recommendations for potential users to secure their experience.
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Mobile Application for Encrypted Calls
Jonáš, Jiří ; Malina, Lukáš (referee) ; Hajný, Jan (advisor)
The thesis is focused on implementation of aplication for secure telephone communication on data network. Application is developed for operating system Android. For call management is responsible signaling protocol SIP and for transfer of voice data is used protocol RTP. For security of call is first created cryptografic key for symetric cryptography. After generating key is established call, which is encrypted by symetric cipher AES. Encrypting between communicating sides is provided in application or on microSD card. Part of solution is measurement of speed of cryptographic primitives, which are used for secure call.
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Advanced security applications for Android
Orgoň, Marek ; Malina, Lukáš (referee) ; Hajný, Jan (advisor)
The thesis deals with security of the Android operating system, both general security features and options for storing sensitive data. The suitability of Android KeyStore for storing sensitive data and the possibility of using the secure element for safe application calculations and smart card emulation are discussed. Using Host-based Card Emulation for contactless smart card emulation is discussed. The performance analysis of modular arithmetic operations for numbers with high bit length is examined. Following these analysis, an implementation of application for software contactless smart card emulation of HM12 and HM14 cryptographic protocol is proposed. And an implementation of application for verifying smart cards with these protocols is proposed. Also scheme for secure storage of sensitive data is proposed.
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