It is defined by Markus Kahn as follows, "Steganography is the science and art of communicating in a way which hides the existence of the message. In Cryptography, the enemy is allowed and able to detect, intercept and modify messages without being able to offend certain security premises guaranteed by a cryptosystem, the main aim of Steganography is to conceal messages inside other messages in a way that does not permit any enemy to even detect that there is a something fishy in
The term photogrammetry is old as term photography. It is derived from three different Greek words; photo means photographs, gram mean drawn and metry mean measurement. The purpose of photogrammetric measurement is to reconstruct three dimensional of an object either in digital (coordinates and derive geometric elements) or in graphical form
Thus this technique is used to reconstruct the original image with the high resolution image given a set of observed images at lower resolution. 2. NEED OF IMAGE COMPRESSION In general, data compression is the process of reducing the amount of data required to represent a given quantity of information. The goal of image compression is to diminish the amount of data required to represent a digital
Conventionally film radiography is widely used for recording the images. In the present day context, power plants and components are expected to perform for over 40 to 60 years. It is thus necessary to have all the design and inspection records appropriately archived so that it can be used later. Digital archiving of data has unlimited life and retrieval capacity. Once the radiography is digitized computational intelligence and image processing methods can be applied for enhancing the quality of the radiographic image and for improving its sensitivity.
SECRET SHARING Shamir’s Secret Sharing algorithm in cryptography is developed by Adi Shamir. It is a method of secret sharing, where a secret is divided into pieces, giving each authenticated member its own unique part, where at least half the parts or more than half are needed together to reconstruct the secret. All shares required together seems to be not practical, and therefore sometimes the threshold scheme is used where any no. of share are sufficient to reconstruct the original secret. Shamirs (t, n)-threshold scheme.
This redundancy has not been deflated enough by current video compression techniques. This paper presents the performance of different block based discrete cosine transform (DCT) algorithms for compressing image. This compressing converts the spatial and temporal correlation of the video signal into a high spatial correlation. Indeed, this technique transforms each group of pictures into one picture eventually with high spatial correlation. RDCT exploits the transformed images with less execution time and adders.
One of many reasons is to protect the company from information leaking to the competitors and if that were to happen, the competitors can easily take away market share/profit from the company; worst case scenario wipe out the company. Another reason is employees were to find out the pay of each employee, it will result in an unhealthy work environment, or employees may choose to quit. Clients exposed to the information can gain bargaining power of dictating how much they’re willing to pay if they’ve been unreasonably charged in the past. Also, if the intent is to keep the confidential information only to the president and not share with vital management, it may stunt growth and remove opportunities/ideas that some management may be able to provide if they could contribute. Therefore, most companies, as mine as well, the confidential information is built with rules of who can be provided with how much information, and where to draw the line when certain questions are asked; many a times I’ve been asked sales numbers of the company by curious salespersons and my response every time is apologetic that I cannot share that information and to seek to their
In today’s world, the Internet is used to access and transfer huge amounts of data. Therefore, security of that data becomes a pivotal issue. Almost everything is stored in databases that are maintained by the servers which provide a secure access to it. This secure access is nothing but a culmination of cryptographic techniques to prevent any kind of misuse of this data. For example, the accounts’ information in a bank’s database contains crucial data misuse of which may lead to a great amount of financial loss.
DATA SECURITY IN LOCAL NETWORKS USING DISTRIBUTED FIREWALLS ADITI GUNDIGAWKAR (13MCA0187) RITIKA ALAWADHI (13MCA0177) ABSTRACT Computer and Network security plays a vital role in preventing and as well as detecting the illegal actions taken by the users of the computer system. Nowadays confidential transactions occur very frequently, computers are used more for transmission as compared to processing of data. Firewall is one of the methods for achieving network security. It is hardware or software which has some rules and condition based on which it permits network transmission. Firewall acts as a filter for illegal access but it restricts between some collections of sets,