This document discusses various methods for securing documents and computers, including backing up files, data compression, and encryption. It explains that backing up files allows restoration of lost or corrupted data and can also prove ownership of documents. Data compression reduces file sizes but requires decompression to use. Encryption transforms files into unreadable format using an algorithm and key, and is used by over half of companies to secure data in storage and transit.
Development and Validation of Liberia’s National Policy for Agricultural Exte...Andrea Bohn
Development and Validation of Liberia’s National Policy for Agricultural Extension and Advisory Services. AIAEE 29th Annual Conference: “Building Capacity through International Agricultural Extension and Education”, May 19-23, 2013, Fort Worth, Texas, USA
The current economic turmoil has hit harder and is biting deeper than any downturn in recent memory. This presentation examines how organisations can respond quickly and efficiently to remain focused on the market, position themselves to take advantage of the upswing when it arrives and reduce costs.
Development and Validation of Liberia’s National Policy for Agricultural Exte...Andrea Bohn
Development and Validation of Liberia’s National Policy for Agricultural Extension and Advisory Services. AIAEE 29th Annual Conference: “Building Capacity through International Agricultural Extension and Education”, May 19-23, 2013, Fort Worth, Texas, USA
The current economic turmoil has hit harder and is biting deeper than any downturn in recent memory. This presentation examines how organisations can respond quickly and efficiently to remain focused on the market, position themselves to take advantage of the upswing when it arrives and reduce costs.
An image in its original form contains large amount of redundant data which consumes huge
amount of memory and can also create storage and transmission problem. The rapid growth in the field of
multimedia and digital images also needs more storage and more bandwidth while data transmission. By
reducing redundant bits within the image data the size of image can also be reduced without affecting
essential data. In this paper we are representing existing lossless image compression techniques. The
image quality will also be discussed on the basis of certain performance parameters such as compression
ratio, peak signal to noise ratio, root mean square.
The tape Industry began in 1952 and the disk Industry in 1956. In 1952, the world’s first
successful commercial tape drive was delivered, the IBM 726 with 12,500 bytes of capacity per
reel. In 1956 the world’s first disk drive was delivered by IBM, the Ramac 350 with 5 megabytes
of capacity. Though no one knew it at the time, two key and lasting events linking disk and tape
for the foreseeable future had just occurred
One of the reasons that intruders can be successful is that most of the information they acquire from a system is in a form that they can read and comprehend. Intruders may reveal the information to others, modify it to misrepresent an individual or organization, or use it to launch an attack. One solution to this problem is, through the use of Steganography. Steganography is a technique of hiding information in digital media. In contrast to cryptography, it is not to keep others from knowing the hidden information but it is to keep others from thinking that the information even exists. In this review paper we will understand what Steganography, Cryptography is and what are the advantages of using them? In last we will discuss our goal of this paper that what types of techniques worked on video Steganography?
Selection & formulation of Research Problem
Literature survey
Development of working hypotheses
Research design
Sampling strategy or sample design
Pilot (quick & dirty) study
Data collection
Processing & analysis of data
Testing hypotheses
Interpretation & generalisation
Preparation of the report
What does continuous data protection (CDP) mean? How does CDP differ from traditional backup, snapshot, RAID, or mirroring? What are the popular CDP solutions?
Data storage makes the process easier to back up files for safekeeping and quick recovery at the time of any unexpected computing crash or cyberattack.
2. Task 5 – Document and Computer Security
Introduction – In this PowerPoint I will talk about how to
protect documents from getting hacked or damaged and
how to secure your computer.
3. Back up
Back up is a process of copying data so that in case you lose your files you
can use your back up to restore it. The purpose of back up is that if you
accidentally delete an important data, or if your files has been corrupted
you can still get it back. Backing up files is important as 67% of people using
the internet suffer data loss.
There are many different ways you can back up your data by using magnetic
data, hard disk, optical storage (discs), floppy disk, solid state storage (USB
flash drives), and remote backup service (backing up via internet).
The importance of backing up is not only restoring files that are lost, it can
also be an evidence that a certain documents belongs to you.
4. Data Compression
Data compression is a technique for eliminating coarse-grained redundant data,
typically to improve storage utilization. Compression is useful because it helps
reduce the consumption of expensive resources, such as hard disk space or
transmission bandwidth.
The downside of data compression is that you have to decompress the
compressed data to use and can take time with different applications. E.g. A
compressed video would need an expensive hardware for the video to be
decompressed fast enough to be viewed as it is being decompressed.
Lossy image compression is used in digital cameras, to increase storage
capacities with minimal degradation of picture quality. Similarly, DVDs use the
lossy MPEG-2 Video codec for video compression.
The Lempel-Ziv (LZ) compression methods are among the most popular
algorithms for lossless storage. DEFLATE is a variation on LZ which is optimized
for decompression speed and compression ratio, therefore compression can be
slow. DEFLATE is used in PKZIP, gzip and PNG. LZW (Lempel-Ziv-Welch) is used in
GIF images. Also noteworthy are the LZR methods, which serve as the basis of
the Zip method.
5. Encryption
Encryption is the process of transforming information using an algorithm
called cipher, to make it unreadable to anyone except those possessing
special knowledge, which is known as a key. The result of the process is
encrypted information.
In many contexts, the word encryption also refers to the reverse process,
decryption. Encryption software can also perform decryption to make the
encrypted information readable again (i.e. to make it unencrypted).
The computer security reported that 71% of companies surveyed utilized
encryption for some of their data in transit, and 53% utilized encryption for
some of their data in storage.
Encryption can be used to protect data "at rest", such as files on computers
and storage devices (e.g. USB flash drives). As there are numerous of reports
that confidential files are being lost or stolen, encryption can help protect
files so that they cannot be stolen.