Greek words “stegos” means “cover” and “grafia ”means writing” defining it as “covered writing”. Steganography is the method through which existence of the secret message can be kept secret. This is achieved by hiding secret message behind another media such as image, audio and video. In image steganography, the message is hidden behind an image. The image into which a message is hidden is called a cover image and the result is stego-image. Two important properties that should be considered while designing a steganographic algorithm are undetectability and embedding capacity. The stego-image must be undetectable and it should embed more data. Steganography has various applications. It can be used in military, commercial and anti-criminal applications, transmission of confidential documents between international governments, e-commerce, media, database systems , digital watermarking etc.
II. LITERATURE REVIEW
In the past, several work has been done on steganography. A very well-known steganographic method is the Least Significant Bit (LSB) substitution method. It embeds secret data by replacing x LSBs of a pixel with x secret bits directly [1]. To minimize the image
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This system embeds varying number of bits in each wavelet coefficicient according to a hiding capacity function so as to maximize the hiding capacity without sacrificing the visual quality of resulting stego image. The system also minimizes the difference between original coefficients values and modified values by using the optimum pixel adjustment algorithm. Experiments and the achieved results showed that this system achieve high hiding capacity up to 48% of the cover image size with sound image quality and high security because of using random insertion of the secret message. But the system suffers from low robustness against various attacks like histogram equalization and JPEG
In America we take freedom and privacy for granted, we as people are unable to comprehend how safe our country actually is, especially in today's society. With that being said there is something that we must all understand, in this age of technology if people are not surveillanced it puts everybody else in our country and the country itself at risk. There are aspects of our privacy and life that we have to sacrifice in order to secure the freedom that we do have. The NSA and U.S. government needs access to our private information in order to ensure the safety of our country and citizens.
Do police officers really need body cameras is a question that has been repeated all throughout the nation. Body cameras are video recording systems that are used by law enforcement to record their interactions with the public and gather video evidence. Most police departments do not wear body cameras currently and the ones that do are in trial phases to see how it works out. There are many advantages to police officers wearing body cameras but in asking the question should they wear body cameras the stakeholders should look at the complete picture. One reason that police and body cameras have constantly been brought up lately are the instances of police brutality happening within the United States. Police brutality within the United States
CCTV which means closed circuit television, this is a system utilizes cameras to provide security by sending specific signal to destination, were it is used surveillance and observation of a place or people. In this paper I will seek to analyze how CCTV can be used as a comprehensive security solution by show the roles that a CCTV system would have to fulfill before it can be considered or viewed as a comprehensive security solution. These roles include deterrence, detection, delaying, assessment and response I will briefly explain each and give example. I will then move to explain how CCTV aids in the prevention and reduction of crime, by look at a reach and how the effect of CCTV in parking lots and other public places. I will also illustrate how CCTV can assist Law enforcement and other security practitioners in their investigations. Readers will be given short synapse of the different types of cameras and systems that are available, and examples of how they can be used and utilized. Last but not least I shall speak about the down side and concerns that come with having a CCTV system. This will be done by showing how the cost may affect the whole system, as it will take a good some of money to install, maintain and monitor the CCTV systems. Afterwards I will elaborate on one of the public major concern, which is surveillance system being intrusive and impeding on their right to privacy. The last concern that I shall discuss is the threat of hacker to CCTV system.
The modern world is full of photographs. They are used for ads, political campaigns, and magazines. However it can be hard to tell whether or not a photograph is real. Many are ‘doctored’ or altered in some way. These doctored photographs can be seemingly harmless, such as advertisements, but they can misrepresent a product or person. There is a fine line between what is ethical and what isn’t for doctored images. Photographs should never be altered in order to deceive individuals, damage someone’s reputation, or when they have a strong negative impact on self-esteem. However if doctored photographs are used for art or for minor touch-ups for advertisements that don’t misrepresent a product then
The history of the modern media surveillance systems begins first with the invention of the computer and the use of software. Before the internet, information was only transported between computers by a physical storage device or an extremely expensive network. Software for media surveillance was only used to scan the media that was available in data form for particular key words. It could then be stored and indexed to be later analyzed. (Sarlós, 1982)
In today’s society I believe that Americans truly enjoy the last piece of their privacy that they have left. There isn’t much left that is private these days. Everything or everyone is being monitored to a certain degree. Your moves on the internet are being followed, you might very well have your phone conversations listened into, and your grocery store purchases are also being recorded.
Jost, Kenneth. "Examining Forensics." CQ Researcher Online. N.p., 17 July 2009. Web. 29 Apr. 2014. . How criminals can use photoshop to eliminate evidence
A powerful worldwide surveillance system is being built up and the world is being watched. Spy satellites are orbiting the earth, those are the eyes in the sky, and millions of video cameras and other sensors are scattered on the earth, the eyes and ears on the ground. The computer networks are continually growing, the brians of the system. Implantable microchips with miniature digital transceivers are attached to many objects and animals, and lately to some hu...
Hackers and terrorists have been using this form of technology for years. The United States governmental officials had suspected an attack on the United States for a period of time and thought the information to be hidden using steganography. Anyone can use and get access to steganographic materials. It's easy to download on numerous sights and no software is required. It's an easy and cheap way to keep information secure and undetectable. The number of steganography sites has doubled in the past two years (Kolata, F4). The United States government is also trying to place restrictions on encryption methods to prevent another catastrophic attack in the world such as the World Trade Center attacks. By having access to a private key the government would have unlimited access to secure information and crack codes all for safety reasons (USA Today). A " private key" is needed to decode any steganographic messages. Images are made up from a combination of an abundant of pixels (tiny dots).
Data encryption refers to the transformation of data into a structure that makes it unreadable by anyone without a secret decryption key. It ensures that messages can be read only by the planned recipient. Encryption is the procedure of obscuring information to create it unreadable without special information. Only organizations and individuals with an abnormal need for secrecy have actually made good use of it. Nowadays, encryption is one of the most important technologies for maintaining your privacy and the security of important information. This helps out greatly especially when E-Commerce is being used.
As a part of under graduating course I presented my major project on JPEG Encoding and Decoding using MATLAB technology, which included going from a basic grayscale bitmap image all the way to a fully encoded file readable by standard image readers.
The nation has become dependent on technology, furthermore, cyberspace. It’s encompassed in everything we deliver in our daily lives, our phones, internet, communication, purchases, entertainment, flying airplane, launching missiles, operating nuclear plants, and implicitly, our protection. The more ever-growing technology empower Americans, the more they become prey to cyber threats. The United States Executive Office of the President stated, “The President identified cybersecurity as one of the top priorities of his administration in doing so, directed a 60-day review to assess polices.” (United States Executive Office of the President, 2009, p.2). Furthermore, critical infrastructure, our network, and internet alike are identified as national assets upon which the administration will orchestrate integrated cybersecurity policies without infringing upon and protecting privacy. While protecting our infrastructure, personal privacy, and civil liberties, we have to keep in mind the private sector owns and operates the majority of our critical and digital infrastructure.
Privacy is the ability to maintain what or who can access and see your personal content and information. With that, the idea of privacy is different amongst different cultures and countries, while they all differ, they share common characteristics. The act of sharing ones own personal information is decision one must make on their own. Privacy is a right that all people should have and the government has the responsibility of maintaining that right. Data such as personal emails, bank details, medical records, and passwords need to remain safe and secure to ensure privacy is not invaded.
Employee rights are very important in the workplace (Rakoczy, C. n.d.). There are some laws to protect employee rights such as safe working environment, discrimination and overtime pay rate to ensure every employee treated fairly. All employees have the right to work in a safe and healthy workplace. In some industries, they use the high-voltage of electricity, extreme temperature, the high-speed and noisy machine in their workplace which can potentially threat to employee health and safety. A safety and healthy workplace must provide reasonable daily and weekly job schedule to the employees. Therefore, when the employee follows the job schedule, they can prevent to work overload because of a systematic system applied by the company.
Society has increasingly placed a high value on image, which has had a profound effect on people, from how to dress, talk, behave, things they idolize, or deem important. Image is a physical likeness, representation, or appearance of a person, or thing, photographed, painted, or otherwise made visible. Image is one of the oldest form of nonverbal communication used to appeal to others; people often judge your integrity, accountability, or professionalism based on appearance. Having the right image can go a long way, by providing opportunities, highlight qualities, and even present life changing experiences. Image is how someone, a group, or corporation, present themselves to the world, it tells a little about who they are. Therefore, image gives an insight to spectators, who form opinions solely on appearances, which is very important as first impressions last.