VoIP is used very extensively today because it is cheap and can used along with network services. The Organizations use same network to send VoIP and data traffic. Many VoIP applications provide good Quality of Service (QoS) but the security they provide are not sufficient for the practical purposes. They can be easily hacked by the crackers since VoIP are used over unsecure public network. Adding Encryption algorithm to the VoIP call is a good method to avoid being hacked during a call. In this paper we test the Quality of Service when various encryption techniques are added to the calls.
Encryption: Encryption is a process where the files is made unreadable by everyone except those who have the keys or the recipients. These encryption convert text into cipher text (encrypt) and vice versa (decrypt). There are two types of encryption keys asymmetric; where more than one key is used and symmetric keys where same key is used for encryption and decryption. In this study only symmetric keys algorithms are used they are: DES, Triple DES (3-DES), Blowfish-256, AES-128, AES-256 and RC2.
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What is encryption? Encryption is a technological technique that protects and secures the transfer of plain text information between two sources through the use of the internet. This is done by rearranging the text using a mathematical algorithm that renovates the message into an indecipherable form, which can only be unlocked and translated with a use of a key. The strength of the encryption key is measured by its length, which is determined by the number of bits and by the type of encryption program.
Sabu M. Thampi, Pradeep K. Atrey, Chun I. Fan, Gregorio Martinez Perez (Eds.), Security in Computing and Communications: International Symposium, SSCC 2013, Mysore, India, August 22-24, 2013. Proceedings (Communications in Computer and Information Science) (p. 418). New York, NY: Springer Publishing.
COMMUNICATION SYSTEM What are the strengths and weaknesses of Telerik’s communication strategy and practices? Strengths :- 1. What is the difference between a. and a. Employees at Telerik work in an open space. The atmosphere is informal, flexible and open.
Asymmetric Key Encryption methods are DSA, Diffie Hellman, RSA, Elliptic Curve and DSA. Asymmetric Encryption
There are many terms which have been introduced by the field of encryption. Each of these terms are need to understand this discussion. Plaintext is the original document to be transmitted or stored on a computer system. Ciphertext is the encrypted document. ...
“Where I’m Calling From” was one of the many short stories written by Raymond Carver in 1983. Many of Carver’s works have a common theme of alcohol. In “Where I’m Calling From,” the unnamed narrator struggled a lot with alcohol, and he had to be dragged down to the rehabilitation facility by his wife and girlfriend on two different occasions. The story opens with the unnamed narrator sitting on the porch of the rehabilitation facility along with J.P., another alcoholic that was also dragged down to the rehabilitation facility twice, once by his wife, and the other by his father-in-law and brother-in-law. The narrator is separated from his wife, and for some reason distant from his girlfriend. J.P., on the other hand, had everything he wanted,
SIP is the application layer control protocol of VOIP which is used for creating ,modifying and terminating a sessions with one or more than one participants.it is a client server protocol, in which client generates a requests and sends it to the server and server process the requests and send it back to the client. SIP provides various services such as User location, User availability, user capability, call setup, call handling.
Data encryption refers to the process of transforming electronic information into a scrambled form that can only be read by someone who knows how to translate the code. In nowadays business world, it’s the easiest and most practical way to secure the information that we stored and processed, and it’s significant for our sensitive information. For example, as electronic commerce is popular now, the vendors and retailers must protect the customers’ personal information from hackers or competitors. They also have many business files or contracts that need to be strictly protected. Without data encryption, these important information may fall into wrong hands and be misused by others. Besides, data encryption may be used to secure sensitive information that exists on company networks, or create digital signatures, and help to authorize in business. No one should underestimate the importance of encryption. A little mistake in encryption may make sensitive information revealing, or even result in illegal and criminal accuse.
Perhaps the most redundant, fault-tolerant of all network topologies is the mesh LAN. Each node is connected to every other node for a true point-to-point connection between every device on the network.
Despite the numerous advantages offered by cloud computing, security is a big issue concerned with cloud computing. There are various security issues and concerns associated with cloud computing, among them being phishing, data loss and data privacy. There are different mitigation measures that cloud pioneers are currently using to ensure data stored in the cloud remain secure and confidential as intended. Encryption is one mitigation method used to ensure security in cloud computing. According to Krutz and Vines (2010), encryption involves coding of the data stored in the computing cloud such that hackers cannot gain access to the data. Data encryption seems to be the most effective method of ensuring security in computing (Krutz and Vines, 2010). However, it is of paramount importance to note that encrypted data is usually difficult to search or perform various calculations on it.
The protection of data being transferred between ATMs and the bank, and the use of cell phones is the most common everyday encounter with encryption. To encrypt and decrypt information a cipher is used. In a cipher there is a set of well-defined steps that can be followed to encrypt and decrypt messages. The use of a cipher relies greatly on the use of an encryption key. The key may contain any auxiliary information added to the cipher to produce certain
ABSTRACT : This paper describes the basic threats to the network security and the basic issues of interest in designing a secure network. it describes the important aspects of network security. A secure network is one which is free of unauthorized entries and hackers. INTRODUCTION
In this era when the Internet provides essential communication between tens of millions of people and is being increasingly used as a tool for security becomes a tremendously important issue to deal with, So it is important to deal with it. There are many aspects to security and many applications, ranging from secure commerce and payments to private communications and protecting passwords. One essential aspect for secure communications is that of cryptography. But it is important to note that while cryptography is necessary for secure communications, it is not by itself sufficient. Cryptography is the science of writing in secret code and is an ancient art; In the old age people use to send encoded message which can be understand by the receiver only who know the symbolic and relative meaning of that encoded message .The first documented use of cryptography in writing dates back to circa 1900 B.C. Egyptian scribe used non-standard hieroglyphs in an inscription. After writing was invented cryptography appeared spontaneously with applications ranging from diplomatic missives to war-time battle plans. It is no surprise, then, that new forms of cryptography came soon after the widespread development of computer communications. In telecommunications and data cryptography is necessary when communicating in any untrusted medium, which includes any network, particularly the Internet [1].Within the context of any application-to-application communication, there are some security requirements, including:
We have noticed how the LTE came about and later it got evolved into LTE – Advanced. These both offer very high speed access to the internet allowing for easy working of various applications involving voice calls, video calls, etc. The main reason for this evolution are the increased data rates, spectrum efficiency and coverage, reduced latency. Various features of the LTE are also studied and their usefulness. We also studied the secrity features and the various vulnerabilities in the 4G LTE networks. In essence LTE basically set into motion the increased usage of mobile and wireless communications in modern day-to-day activities but there is still space for improvement.
Internet Voice, also known as Voice over Internet Protocol (VoIP), is a technology that allows you to make regular telephone calls using a dial up or broadband internet connection instead of a regular phone line. Some services using VoIP may only allow you to call other people using the same service, bu...