International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Email encryption using Tri-cryptosystem based on android 1
Surendra Seervi; 2 Prem Parmar; 3 Niraj Viadya; 4 Hari Rajai 4Assistant
Professor Students Department of ComputeEngineering, 1-3B.E.
K.C. College of Engineering & Management studies Research Kopri, Thane (E)-400 603, India II. TRI-CRYPTOSYSTEM SYSTEM
Abstract—In the growing era of Digital Technology, a common question arise from digital users whether the digital Application is secure or not. Since the application is designed on a language the attacker always try to find new loop holes and has a result a new type of criminal activities take place. Even best encryption can be breached to corrupt the data, steal information, Cyber fraud, etc. This paper focuses on Email Security on Android Operating System by implementing the Tri-cryptosystem which is a combination of Symmetric cryptosystem, public key cryptosystem and hash function.
Symmetric and asymmetric ciphers each have their own merits and demerits. Symmetric ciphers are faster than asymmetric ciphers, but require all parties to somehow share a secret key. But at the cost of speed asymmetric algorithms allow public key infrastructures and key exchange systems [4]. A Tri-cryptosystem is a protocol using multiple ciphers of different types together, each to its best merits. One common approach is to generate a random secret key for a symmetric cipher, and then encrypt this key via an asymmetric cipher using the recipient’s public key. The message itself is then encrypted using the symmetric cipher and the private key. Both the encrypted secret key and the encrypted message are then sent to the recipient.
Keywords– tri-cryptography, symmetric encryption, asymmetric encryption, hash function, secure email
I. INTRODUCTION
The recipient decrypt the secret key first, using his/her own private key, and then uses that key to decrypt the message.
A most popular internet service is e-mail. Email is way to exchange text by using internet connection. Now almost internet services can be enjoyed by using mobile devices such as notebook, smart phone and tablet PC anywhere and anytime. Purposely, or not, the usage of e-mail to exchange information and collaborate, is not only limited to public information, but also confidential information, To certain parties which has a value of confidentiality so that it needs some security controls.
A. SYMMETRIC CRYPTOGRAPHY An encryption system in which the sender and receiver uses a single, common key that is used to encrypt and decrypt the message. In contrast with public key cryptography, this utilizes two keys - a public key to encrypt messages and a private key to decrypt message. Symmetric-key systems are simpler and faster, but the main drawback is that the two parties somehow exchange the key in a secure way.
By using mobile devices with internet connection, e-mail services can be used widely by many people to exchange information and collaborate, both for individual, enterprise and government. One of the most popular Operating System is Android. In order to prove safety of email sent from Android smart phone, encryption and decryption process have to be installed in an client side. All security systems use cryptographic because it suggest several algorithms and techniques practically unavailable to break because of their entanglement.
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B.ASYMMETRIC CRYPTOGRAPHY Asymmetric cryptography is also known as public key cryptography, uses public and private keys for encryption and decryption of the data. The keys are simply large numbers that have been paired together but are not
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