Image Steganography Techniques – A Survey
Roshni B. Solanki
PG student,Computer Engineering
Sarvajanik College of Engineering Technology
Surat, India roshanisolanki23@gmail.com Abstract— In today’s era, due to advancements in the field of information technology, the need for information security is highly increasing day by day. Steganography plays a major role in secret data communication. It is nothing but to communicate in such a way that not only the contents are hidden but also the existence of message is kept secret which makes it different from cryptography which concerns only with keeping the contents secret. Steganography can be accomplished by hiding the information in other information, and for that, many different carrier file
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The security of our data has always been a prominent issue. Our secret data needs to be so secure and safe so that it can only access by the authorized person. The amount of data sharing on the internet from one place to another is increasing day by day and that amount is beyond our imagination. So with rising of data sharing, the need for security of data is also increased. Steganography plays a major role in secret data communication. It is nothing but to communicate in such a way that not only the contents are hidden but also the existence of message is kept secret which makes it different from cryptography which concerns only with keeping the contents secret. Steganography and cryptography they both have the same purpose that is, to provide security to our data. But, they have a different approach. Steganography deals with making the data unseen and cryptography deals with making the data unreadable. So finally,we can say that the cryptography deals with the privacy of data and steganography deals with the secrecy of data. However, steganography method is not intended to substitute or replace the cryptography method but rather to complement cryptography. What if we combine both? We can provide more security to our data, right?. So, using cryptography along with the steganography provides more security to our data, that …show more content…
Steganography mainly aims to hide the data in a cover medium so that no one can suspect the existence of secret information which is hidden behind it. For this purpose, many different carrier file formats are used such as audio, video, text, and image. The most popular carrier for steganography is the image because of their frequency on the internet, so hiding the data behind image file is known as image steganography. Secret data hiding in digital images has drawn much attention in recent years.
II. RELATED WORK
Different algorithms of image steganography are :
a) Dynamic Approach of Frequency Based Image Steganography : uses image compression and it is based on transform domain. Advantage is that the process of data hiding is done by randoming approach. Limitation is that it has high MSE and stego image quality is minor changed after embedding.
b) Skip position approach : It is a spatial domain technique that deals with MSB, LSB and middle bit. Advantages are high payload capacity, security and the process of data hiding is done by randoming
3.4 Functional Requirements • The system should process the input given by the user only if it is an image file (JPG, PNG etc.) • System shall show the error message to the user when the input given is not in the required format. • System should detect characters present in the image. • System should retrieve characters present in the image and display them to the user.
Ever since data is in encrypted format, its probably difficult for attacker to decode it ; but this will ultimately lead to data owner to suffer in one or the other way. 6. In order to solve this problem metadata is stored for each server content into proxy server. 7. Suppose size of data stored in server 1 is 2GB and similarly size of data stored in server2 is 2 GB.
This is done by calculating the hash value of the image, both before and after the image is
Operation Slapshot is an undercover operation conducted by New Jersey state police to take down a gambling ring that took place throughout the United States. The ring involved Janet Jones, Rick Tocchet, James Harney, Wayne Gretzky, Michael Barnett, Jeremy Roenick, and Travis Green. There were also other players, coaches, and other staff members who were implicated in the gambling ring. The gambling ring allegedly had ties to the Bruno-Scarfo crime family, who has their operation in Philadelphia and in southern New Jersey.
Body Cameras Don 't Work If They Are Not Worn or Not Turned On After Michael Brown, the unarmed black teen who was shot in Ferguson, Missouri, America made it known that we want police officers to wear body cameras. Police Departments responded by saying they want officers to wear body cameras, too. So, if everybody wants the officers to wear body cameras why are there still so many incidents of questionable conduct that are not recorded? According to the Huffington Post, only 2 of the 27 large U.S. cities looked at had all of their officers equipped with body cams.
1. Born into an Catholic Irish-American family of six children and two low class working parents, James "Whitey" Bulger didn't waste any time before ensuing his career in crime. Growing up as a young kid Whitey always had dreams of "running away with the circus" and he did just that at the age of 10. He began to get into street fights and stealing and quickly at the age of 13 was when he was first charged and arrested for delinquency and stealing. Things would only escalate from here.
Are body cameras an invasion of privacy to the officers and to the public? Do they help when civilians make false accusations against officers? These are the types of questions that are frequently asked about body cameras. In today 's society, many citizens believe that the use of body cameras is in invasion of privacy, while others think they can be really helpful.
According to the article “Spy Letters of the American Revolution” and “Spy Techniques of the Revolutionary War” invisible ink contained ferrous sulfate and water. The code would be in the lines of a normal letter and the code was revealed by adding heat to the paper. Ciphers are another way of communicating in the spy world, both the British and Americans used these techniques. Ciphers were coded letters that
It’s no secret that everyone holds their own opinion regarding the actions of police officers and other positions of authority within these past years, be it positive or negative. From the shootings of innocent and unarmed civilians to disciplinary action being taken against those that haven’t done anything unlawful, there’s rarely a day when the police force of the United States doesn’t find itself involved in some sort of controversy. No matter what side people find themselves supporting in these instances, be it the police or the civilian, it’s true that both sides can benefit from the use of these police body cameras. Police body cameras hold one main purpose and that’s to deteriorate the ever-present risk of unnecessary aggression on
“Women’s clothing made it easy to hide information… The many yards of fabric were perfect for hiding messages and papers, small packages and medical supplies easily attached to the frame of the hoop skirts…” (Harper). Again, because of the understanding of men not touching women, they easily transported information that way because no one thought to search women. Another trick used by Elizabeth Van Lew, and other spies, was using “an invisible ink to write their messages between the lines of “ordinary” letters” (Harper).
1. Symmetric encryption the keys should be changed frequently. They are shared between two peers, keys should be known only by the two members using them. So confidentiality is extremely important to key exchange. In-band key exchange takes place in the existing and established communication channel.
With the introduction of new technology in recent years, the government can discreetly capture evidence from electronic files,
With two clicks of a button, the picture is instantly duplicated onto a new file. And there 's really no way to determine whether the image is a duplicated forgery because stolen digital art can be completely identical to the original, right down to the individual pixels. Artists can add a watermark to their work and display their name to gain recognition for their art. These watermarks can vary from small signatures in the corner, to large copyright notices stamped right in the middle of the image.
The movie Hidden Figures by Theodore Melfi is talking about the civil rights and equality of men and women in 1970 's to 1990’s. The Mise-en-scene means "setting up a scene. " There are six elements that make up mise-en-scene acting, costume and make-up, setting, lighting, composition or space and lastly. In Hidden Figures, the mise-en-scene helps audiences to become closer to the story and have the same feeling as those main characters. The director uses many different kind of shout angles to show the unbalanced between black people and white people at that time and the color and lighting also help the director can present the emotions that the characters are facing different kind of events or people.
Benoit defines image restoration theory as strategies used to mitigate image damage following a threat to a reputation (organizational or personal) (Blosenhauer, 2014). As we know that, image is possible a very important concern nowadays. Thus, when reputation is threatened especially during crisis happens, individuals and organizations are encouraged to justify themselves to the attack. Organization works on effort to ensure that crises are anticipated, managed, and evaluated effectively and efficiency before any unfavorable impression is formed.