VPN stands for Virtual Private Network. VPN is the term used to refer to any device that is capable of creating a semi-permanent encrypted tunnel over the public network between two private machines or networks to pass non-protocol specific, or arbitrary, traffic. This tunnel can carry all forms of traffic between these two machines meaning it is encrypting on a link basis, not on a per application basis. VPNs are useful in situations where an entity is paying for dedicated leased lines due to security concerns or the need to provide layer two communications over a WAN link via transparent bridging, WINS servers, or other broadcast repeaters (Snyder, 2004).
The VPN allows the end points to connect to the Internet and have this same functionality without the need for expensive leased lines. The other common use for VPNs is to provide dial-up access or network extension for remote employees. Instead of making expensive calls and maintaining access servers with modem banks, a remote user can dial up and connect to the Internet locally, then use the VPN to access the main site securely over the Internet. This allows for reduction in phone bills and elimination of expensive and hard to secure modem banks and access servers. One of the key elements of VPNs is encryption. To protect sensitive or non-routable data as it passes over the public Internet, we need to create a virtual private tunnel (Snyder, 2004). This tunnel is built by encrypting the packets or frames and then encapsulating these in regular IP traffic between the two hosts or networks. The protection and encapsulation of these packets is vital to the function of a VPN and one of the most complex pieces to get right (Schneier and Ferguson, 2006). VPNs work by creating a virtual tunnel over the public Internet. In order to create this tunnel, symmetric encryption is used. Both sides of the tunnel share common encryption and decryption keys and use them to encrypt all traffic in both directions. Symmetric encryption is very fast and there are many solid algorithms available to implement this (Blowfish, AES, 3DES) (Dumon, 2006). There are two problems with symmetric encryption. To get these common keys to both sides of the tunnel is called key exchange or key agreement. To know we are exchanging keys with the correct entity is called authentication (Dumon, 2006). There are many ways to exchange keys.
Encryption is the most powerful way to secure information by protecting it in the occurrence of theft, loss, or unauthorized access. It scrambles your data by requiring the receiver to have a secret key or password which would allow them to decrypt it. Web browsers indicate encrypted security techniques by showing a “lock” icon in the status bar. Webpages for online shopping will have either “http” at their beginning of the web address or a “lock” icon on the page. Email services should be protected by antivirus software. These
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.
Telehealth is the monitoring via remote exchange of physiological data between a patient at home and health care professionals at hospitals or clinics to assist with diagnosis and treatment. As our society ages and health care costs increase, government and private insurance payers are seeking technological interventions. Technological solutions may provide high quality healthcare services at a distance, utilize professional resources more effectively, and enable elderly and ill patients to remain in their own homes. Patients may experience decreased hospitalization and urgent care settings, and out of home care may not be required as the patient is monitored at home. However, no study has been able to prove telehealth benefits conclusively. This change in health care delivery presents new ethical concerns, and new relationship boundaries between health care professionals, patients, and family members. This paper will discuss telehealth benefits in specific patient populations, costs benefits of using telehealth, and concerns of using telehealth.
According to Tuncay Bayrak, in his paper, IT Support Services For Telecommuting Workforce, in new era of technology, organization faced many radical changes. The changes involved from traditional workplace into more technology ways. With the existence of various types of software that enable long-distance communication, telecommuting workforce has been evolved. Nowadays, the organization was transformed to become a network-based operating structure where employees are not tied to the workplace. Every day, the rank of telecommuter job continues to grow. Telecommuting job allows employees to work from home or remote locations across the world. The question is what is the different service support that was provided by the organization for telecommuter and traditionally employee in a regular office. The aims of this study are to explain many types of support service for telecommuting employee that can be provided and the different support service that needed for telecommuters and desktop computing. The goal of this paper is to provide a framework to help IT manager to solve the issues in increase their potential benefit of providing good support service.
Telemental Health Collaboration Protocol: What is the best way for rural nurses to help the elderly population decrease depression?
Asymmetric Encryption is used to protect the data while in movement. Asymmetric Encryption is also known as Public Key Encryption. It uses two related keys, a public key and a private key which is not shared with anyone. This pair of keys are developed by mathematical methods which can be solved in one direction. So anyone can encode a data using the public key but only the user with a private key can decode that specific data. The length of Asymmetric Key Encryption is normally 1024 or 2048 bits. However, in Asymmetric framework the keys with smaller than 2048bits are considered as not safe to use.
A network can be based on either a peer-to-peer level or server-based, also referred to as domain-based. To distinguish the difference, a peer-to-peer network, also known as a workgroup, is a network in which a group of computers are connected together to share resources, such as files, applications, or peripherals. The computers in a peer-to-peer network are peers to one another, meaning no single computer has control over one another. There is also no central location for users to access resources, which means that each individual computer must share their files in order for other computers to have access (Muller, 2003, p.411). “In a peer-to-peer environment, access rights are governed by setting sharing permissions on individual machines.” (Cope, 2002) On the other hand, in a domain-based network, the computers connected together are either servers or clients. All of the other computers connected to the network are called client computers. The server is a dedicated machine that acts as a central location for users to share and access resources. The server controls the level of authority each user has to the shared resources. When logging on to the network, users on client machines are authenticated by the server, based on a user name and password (Lowe, 2004, p.13).
TOR (Roger Dingledine) is a circuit based low-latency anonymous communication service. TOR is now in its second generation and was developed from the Onion routing program. The routing system can run on several operating systems and protect the anonymity of the user. The latest TOR version supports perfect forward secrecy, congestion control, directory servers, integrity checking and configurable exit policies. Tor is essentially a distributed overlay network which works on the application layer of the TCP protocol. It essentially anonymizes all TCP-based applications like web-browsing, SSH, instant messaging. Using TOR can protect against common form of Internet surveillance known as “traffic analysis” (Electronic Frontier Foundation). Knowing the source and destination of your internet traffic allows others to track your behavior and interests. An IP packet has a header and a dat...
The increasing use of NAT comes from a number of factors. The major factor is that there is a world shortage of IP addresses. As the Internet has grown, assigning perfectly good network addresses to private networks came to be seen as a waste. Under the Network Address Translation (NAT) standard, certain IP addresses were set aside for reuse by private networks. In addition to reducing the number of IPv4 addresses needed, NAT also provides a layer of obscurity for the private network, because all hosts outside of the private network observe communication through the one shared IP address. NAT is not the same thing as a firewall or a proxy server, but it does contribute to security. NAT also succeeds in the ease and flexibility of network administration. It can divide a large network into several smaller ones by exposing only one IP address to the outside, which means that computers can be added, removed, or have their addresses changed without impacting external networks. Other benefits include Protocol-level protection, Automatic client computer configuration control, and Packet level filtering and routing.
Wireless local area networks (WLANs) have the potential to improve the flexibility, productivity, and the quality of work life of an enterprise (Sage Research Staff, 2001). Berean Institute is a typical two year college with about a staff of sixty eight employees and 250 students per semester. Berean teaches cosmetology, barbering and the latest software and hardware technology, which is located in Philadelphia, Pennsylvania. Berean currently has two locations in the Philadelphia area and using a Local Area Network (LAN).
VPN stands for Virtual Private Network. VPN is a data network connection that makes use of the public telecommunication infrastructure but maintains privacy through the use of a tunneling protocol and security procedures. It operates much like a Wide Area Network (WAN).
This proposal is for a small office that will have users who are connected by Wi-Fi or cable. The network will include devices and resources that is shared among all the users. The network will need to have security measures in place to protect the entire network and keep the wireless access secure and available only to employees of the company.
There are numerous network security devices and tools available to aid in computer network defense, and these tools are often relied upon for protecting against increasingly sophisticated, stealthy, and damaging attacks. When acting alone, the current generation of security devices has an exceedingly difficult time providing an effective defense against such threats, and the situation is particularly grim for targeted or novel attacks.
The length of the key for the encryption can vary from being very short to extremely long, and the length of the message being encrypted. 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.
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