Passwords Part-03

Passwords Part-01

Passwords Part-02

Passwords Part-03

Single Sign-On and Password Synchronization

One issue that has irritated users in large secure environments is the burgeoning number of passwords they have to remember to access various applications. A user might need one password to log onto his or her workstation, another to access the network, and yet another for a particular server. Ideally, a user should be able to sign on once, with a single password, and be able to access all the other systems on which he or she has authorization.
Some have called this notion of single sign-on the “Holy Grail” of computer security.

Password - PsvpTamil

The goal is admirable to create a common enterprise security infrastructure to re-place a heterogeneous one. And it is currently being at-tempted by several vendors through technologies such as the Open Group’s Distributed Computing Environment (DCE), MIT’s Kerberos, Microsoft’s ActiveDirectory, and Public-Key Infrastructure (PKI)-based systems. However, few, if any, enterprises have actually achieved their goal. Unfortunately, the task of changing all existing applications to use a common security infrastructure is very difficult, and this has further been hampered by a lack of consensus on a common security infrastructure. As a result, the disparate proprietary and standards-based solutions cannot be applied to every system. In addition, there is a risk of a single point of failure. Should one user’s pass-word be compromised, it is not just his local system that can be breached but the entire enterprise.

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12 Dangerous Symptoms in Children You Should Never Ignore

Children's Health - PsvpTamilWhen we become parents, the well-being of our children becomes one of our top priorities. When they are afflicted with an extreme illness, our concern increases because seeing our children suffer brings a feeling of helplessness unlike any other.

Because of this, the first sign of something abnormal makes us jump to see an expert or find a way to cure the illness before it escalates beyond our control. However, even with the all-seeing eye of a parent, we can sometimes overlook the dangerous symptoms of disease.

Here are some of those dangerous symptoms that should never be ignored:
1. High fever
In the case of a baby up to three months old, a temperature of 100 degrees Fahrenheit and above should be immediately checked out. For a baby that is three to six months old, a high fever is considered to be anything above 101 degrees. After that, a high fever for your child is usually about 103 degrees Fahrenheit.

Remember that the level shown on the thermometer is not the only important thing to consider when diagnosing an problem. If the fever is still low, but the child is very unwell, contact your pediatrician.
2. Long-term fever
If, after four hours of using antipyretic drugs, the fever has still not lowered, or if an untreated fever (high or low) has lasted for more than five days, seek medical help as soon as possible.
3. Fever associated with headache
Be very wary of complaints of neck pain, a stiff neck or headaches associated with fever, as these symptoms can often be associated with meningitis.
4. Red spots on the skin
Allergic reaction to a number of diseases such symptom needs to be examined so appropriate treatment can be initiated. If you notice any spots, consult a pediatrician.

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Five Things Every Woman Should Absolutely Deny a Man

Men and Women - PsvpTamilThere are things no woman should do to please a man. These are the things that compromise her character and kill her personality. If a man asks you to do any of these five things, avoid him at all costs – whether he’s an acquaintance, friend or even a stranger.
1. Accept everything he says
He has the right to his opinion and you have the right to yours. You don’t have to accept everything someone else says in order to be a friend. In fact, a man and woman connect the most when they share their different ideas and beliefs. If he doesn’t care about what you have to say, he doesn’t care about you. And if he argues with all of your opinions, he is a control freak.

You should be equal partners. You both have a place in the relationship, and that space must be respected. Obviously in a good relationship you both make sacrifices, but this doesn’t mean he has the right to control you.

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Passwords Part-02

Passwords Part-01

Passwords Part-02

Hashing
A hash function is an algorithm that takes a variable-length string as the input and produces a fixed-length value (hash) as the output. The challenge for a hashing algorithm is to make this process irreversible; that is, finding

a string that produces a given hash value should be very difficult. It should also be difficult to find two arbitrary strings that produce the same hash value. Also called a message digest or fingerprint, several one-way hash functions are in common use today. Among these are Se-cure Hashing Algorithm-1 (SHA-1) and Message Digest-5 (MD-5). The latter was invented by Ron Rivest for RSA Security, Inc. and produces a 128-bit hash value. See Table 1 for an example of output generated by MD5. SHA-1 was developed by the U.S. National Institute of Standards and Technology (NIST) and the National Security Agency (NSA) and produces 160-bit hash values. SHA-1 is generally considered more secure than MD5 due to its longer hash value.
Microsoft Windows NT uses one-way hash functions to store password information in the Security Account Manager (SAM). There are no Windows32 Applications Programming Interface (API) function calls to retrieve user passwords because the system does not store them. It stores only hash values. However, even a hash-encrypted password in a database is not entirely secure. A cracking tool can compile a list of, say, the one million most commonly used passwords and compute hash functions from all of them. Then the tool can obtain the system account database and compare the hashed passwords in the database with its own list to see what matches. This is called a “dictionary attack” (see “Password Cracking Tools”).

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Passwords Part-01

INTRODUCTION

The ancient folk tale of Ali Baba and the forty thieves mentions the use of a password. In this story, Ali Baba finds that the phrase “Open Sesame” magically opens the entrance to a cave where the thieves have hidden their treasure. Similarly, modern computer systems use pass-words to authenticate users and allow them entrance to system resources and data shares on an automated basis. The use of passwords in computer systems likely can be traced to the earliest time sharing and dial-up networks. Passwords were probably not used before then in purely batch systems.

The security provided by a password system depends on the passwords being kept secret at all times. Thus, a password is vulnerable to compromise whenever it is used, stored, or even known. In a password-based authen-tication mechanism implemented on a computer system, passwords are vulnerable to compromise due to five es-sential aspects of the password system:

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Sports & Media Effects Part – 02

SPORTS AND MEDIA EFFECTS - Farhan Online

Participation in group viewing of a sports event can fulfill some of the social needs of the individuals, especially when they are cheering for a local hero, which is what these people in Austin, Texas, were doing when they watched Lance Armstrong win his second consecutive Tour de France on July 23, 2000. (Reuters NewMedia Inc./Corbis)

Sports & Media Effects Part – 01

Sports & Media Effects Part – 02

Escapism

The fourth motive, escapism, applies quite broadly to many varieties of entertainment. People will often go to a movie or watch a television drama to escape momentarily their everyday humdrum. Sport spectating, however, seems to be an extraordinarily effective escape as evidenced by the following examples. During World War II, President Franklin D. Roosevelt made a decision to let the professional baseball seasons continue. In spite of the burden on the teams, players, and families, he hoped that it would provide Americans with an escape from their trying times (Wann, 1997). This, combined with the creation of the All-American Girls Professional Baseball League in 1943 (immortalized in the 1988 film A League of Their Own), at a time when a large number of male ballplayers were drafted for military service, points to the particular salience of sport spectatorship as an effective route for escape from worries.

Entertainment

The fifth motive, entertainment, is relatively self-explanatory. Spectators seek to be entertained by watching or listening to sporting events. According to sport psychologist Daniel Wann (1997), this motive may play heavily into the spectating of pseudosports. Pseudosports are ath-letic contests that are scripted and staged; for example, roller derby or professional wrestling. Sport researcher George P. Stone found in 1971 that although there is no surprise in the rigged outcome of these events—which is one of the fac-tors that differentiates sports from other entertain-ment—spectators were still attracted to them for their sheer entertainment value.
The seemingly paradoxical enjoyment of even these highly predictable sporting events may be due in part to the two basic tenets of disposition theory in sport fanship. These are laid out simply by Zillmann, Bryant, and Sapolsky (1989) as fol-lows: (1) positive feelings for a party (i.e., a team or player) will increase the enjoyment of witness-ing the victory of that party and (2) negative feel-ings toward a party will increase the enjoyment of witnessing the defeat of that party. These simple propositions are easy to apply to a sport where the victory of the proverbial “good guy” over the “bad guy” is doubtlessly written into the script. How-ever, such a view would also predict that the entertainment value should be magnified when the outcome is uncertain, making victory sweeter and defeat more devastating. Indeed, Zillmann, Bryant, and Sapolsky (1989) reported that factors that accentuate the human drama of sports (e.g., announcers that present the players as embittered rivals or the fierce competitive spirit of the partic-ipants in a contest) enhance the enjoyment of the sporting event.

Aesthetics

The sixth motive for sport spectatorship, and one closely related to entertainment, is aesthetics. By the motive of aesthetics, it is meant that spec-tators are drawn to certain types of sports for the qualities of beauty, grace, and skill inherent in them. Sports such as figure skating, synchronized swimming, or gymnastics lend themselves for obvious reasons to aesthetic appreciation. Ameri-can football, baseball, and hockey might not seem such likely candidates for this motive, but one need only talk with a devotee of hockey or pay notice to the title of Robert Mayer’s 1984 book The Grace of Shortstops to realize that this is not nec-essarily the case. People marvel at the athletic ability of these skilled individuals who make diffi-cult, unbelievable plays. In fact, the cable sports network ESPN has begun to give out awards known as ESPYs to plays that are recognized as the most outstanding ones of the year.
Although relatively little research has been devoted to investigating the particular role of aes-thetics in sport spectatorship, there is some evi-dence that people appreciate and enjoy more complicated and difficult plays. However, it is often hard to separate the effects of the riskiness of a play from the success of the play. Risky or difficult plays that are successful lead to greater enjoyment (“great call”), but unsuccessful risky plays often result in the greatest disappointment. Nonetheless, there is sufficient evidence to this point that spectators derive enjoyment from an aesthetic appreciation of the skill and agility, as well as the competitiveness and intensity, of the players.

Self-Esteem Management

The last motive that will be discussed in this entry, self-esteem management, is one of the more thoroughly researched and complex motives of sport spectators. Several researchers have found that sport spectators derive self-esteem enhance-ment from identifying with a successful team. Robert Cialdini and his colleagues (1976) denoted a phenomenon known as “basking-in-reflected-glory” (or BIRGing), which refers to the tendency for individuals to proclaim their associ-ation with a successful other. For example, Cial-dini and his colleagues found that fans of a university’s college football team were more likely to wear school-identifying apparel on the Mon-days following team victories than on Mondays following team defeats. Moreover, in describing the outcome of team games, university students used the pronoun “we” to describe team victories (e.g., “We won that game, 20–17”) but used the pronoun “they” to describe team losses (e.g., “They lost, 38–14”). This research demonstrated that sports fans are more likely to illustrate their connection with a team when that team is suc-cessful. Conversely, sports fans tend to distance themselves from a team when that team is unsuc-cessful, a phenomenon that has been labeled “cutting-off-reflected-failure” (or CORFing). Cialdini and his colleagues argued that by BIRG-ing, an individual can derive positive esteem from their association with a successful other. Indeed, people often state their association (e.g., from the same hometown, attended the same school) with a famous celebrity or personality. Similarly, iden-tifying with a successful sports team can be a way to derive self-esteem from the success of the team. Team success becomes a personal success, and one can take pride in the accomplishment of one’s team.

But do people really feel greater self-esteem when a team is successful? Cialdini and Kenneth Richardson (1980) found that people whose self-esteem had previously been threatened (by failure on a social-skills task) were more likely to bask in the success of their school’s teams (as well as its other assets). Moreover, these same individuals experiencing a self-esteem threat were most likely to blast their school’s rival. Thus, it appears that self-esteem needs are indeed involved in the BIRG-ing phenomenon. Furthermore, Edward Hirt and his colleagues (1992) directly measured the self-esteem of fans after team victories and defeats and found that fans showed some elevation in mood and self-esteem after team wins, but reported lower mood and self-esteem following team losses. Indeed, in one study (Hirt et al., 1992; study 2), the reactions of fans to team success and failure were compared to a personal success and failure (i.e., doing well or poorly on a test of general intel-lectual ability). The results indicated that the mood and self-esteem of fans were as high after team success as after personal success, and as low after team failure as after personal failure.
These data strongly suggest that fans ally them-selves so closely to their team that they view team success as a personal success and team failure as a personal failure. Moreover, the outcome of a team had profound effects on the predictions by fans of their own future performance. Hirt and his col-leagues (1992) had fans predict how well they would do at a series of tasks following the game. It was found that after wins, fans were much more optimistic about their performance at these differ-ent tasks than they were after losses. After wins, fans viewed themselves as winners and predicted that they would be more successful in their future endeavors; after losses, they viewed themselves as losers and were much more pessimistic about the future. The most interesting implication of these findings is that, at least for highly allegiant fans, following their team is a precarious proposition. Fans can derive greater self-esteem when their team is successful but suffer self-esteem decre-ments when their team is unsuccessful.
It is important to note that not all sport spec-tators are highly allegiant fans. Many spectators may have little or no allegiance to the teams play-ing or may be best characterized as “fair weather fans” who jump on the bandwagon of teams who are successful and can bask in their reflected glory (BIRG). When these teams are no longer success-ful, these spectators lose interest in the team and can cut off reflected failure (CORF). However, for fans who strongly identify with a team, they main-tain their allegiance to the team through thick and thin. They suffer through the poor seasons and hard times, but relish the successful seasons and good times. The sense of loyalty that these indi-viduals feel to their team becomes a critical part of their identity and they steadfastly maintain their allegiance to the team (case in point, the long-suf-fering Chicago Cubs fans).

An intriguing aspect of the BIRGing phenome-non is that the spectators feel justified in taking some credit for the success of the team. While many people acknowledge the “home-field advantage” in sports and view this advantage as at least partially due to the support and cheering of the fans in the audience during home games, it is more difficult to imagine how spectators watching the game on tele-vision can believe that they had a causal effect on the game. However irrational this belief may appear to be, psychological research has shown that indi-viduals merely associated with positive or desirable events are liked, whereas individuals associated with negative or undesirable events are disliked (cf. Zajonc, 1980). Thus, associating with a winner or a team of winners will elevate the esteem of an indi-vidual in the eyes of others and is an avenue for improving an individual’s self-evaluation.
Research has attempted to understand other bases for the desire of fans to affiliate themselves with sports teams. Mark Dechesne, Jeff Greenberg, and their colleagues (2000) argued that one source may be a fear of death. In their research, they compared the reactions of people who are first asked to consider their own death (a mortal-ity salient condition) to a control condition wherein people are not asked to ponder their own mortality. They found that fans who were reminded of their own death showed stronger affiliation and identification with their team, sug-gesting that allegiance to a successful team may help individuals cope with and transcend mortal-ity concerns. These conclusions also fit in nicely with the notion that identifying with sports teams serves social needs for belongingness: individuals who feel connected to and identify with a success-ful other or group may feel better about them-selves and the meaningfulness of their existence.

Dispositional Approaches

As has been discussed, there are a variety of dif-ferent theories about what motivates people to be sport spectators. It Encyclopedia Of Communication & Informationis likely that, for many individ-uals, multiple goals and motives are being satisfied while watching sports. Sport spectating may serve as a source of highly stimulating and captivating entertainment, while simultaneously satisfying social and self-esteem needs. Indeed, the perva-siveness of sport spectatorship in Western society almost requires that this is so, since its appeal extends to so many different types of people This is not to say that there are not individual differences in the kinds of people who are the most avid sport spectators. A good deal of research has attempted to identify a personality profile of the sports fan. The word “fan,” short for “fanatic,” implies an individual with an undying devotion to their team. Indeed, the behavior of these highly devoted fans (whose rituals before and during games are legendary) is often bewildering to those individuals who are not fans. A dispositional approach to sport fanship has yielded some inter-esting findings, but its greatest contribution appears to be demonstrating how individual differ-ences moderate the strength of the various motives underlying sport spectatorship. For example, indi-viduals differ in their degree of sensation seeking (Zuckerman, 1979). High-sensation seekers crave excitement and are easily bored; these individuals tend to prefer high-risk sports and activities. Low-sensation seekers, on the other hand, tend to pre-fer the safety and predictability of routine. Thus, the extent to which stimulation motives underlie sport fanship should be greater for high-sensation-seeking individuals. Similarly, individuals with low self-esteem have been shown to be likely to engage in indirect forms of self-enhancement, such as basking in reflected glory (Brown, Collins, and Schmidt, 1988). Individuals with high self-esteem prefer to derive their esteem from their own accomplishments as opposed to the accomplish-ments of others with whom they are associated. As a result, the self-esteem management function of sport fanship is likely to play a greater role for indi-viduals with low self-esteem. These results under-score the value in considering that certain types of individuals may be more prone to be attracted to sports and to become sport spectators precisely because salient motives in their lives can be satis-fied through sport fanship.

Conclusions and Future Directions

It is clear at the beginning of the twentieth cen-tury that sport spectatorship is growing to unprecedented proportions. Further research is needed in order to understand the bases for this phenomenon. Although the theories and research reviewed in this entry have provided some insights to the reasons and motives that may be associated with sport spectatorship, the work has been generally descriptive in nature and has not fully elaborated the factors underlying these motives or the ways in which watching sports sat-964 • SPORTS AND MEDIA EFFECTS
isfies these fundamental needs and motives. One potential fruitful avenue for future research is an examination of the biological bases for these motives. Indeed, some of the work on individual differences has focused on the biological differ-ences between individuals who are high or low in sensation seeking. People who have a high level of sensation seeking have a lower baseline level of arousal than people who have a low level of sen-sation seeking—which may account for their greater need to seek arousing stimuli in their envi-ronment. Work by Paul Bernhardt, James Dabbs, and their colleagues (1998) has found changes in the testosterone levels of fans in response to the winning and losing of their sports teams, changes that seem to parallel the psychological changes to winning and losing that were documented earlier in this entry. Increases in testosterone levels were associated with watching winning performances, implying that physiological changes may under-score psychological phenomena such as basking in reflected glory. Furthermore, changes in testos-terone levels have been shown to be associated with expressions of dominance and aggressive behavior, which may provide some links to under-standing achievement-seeking motives in sport spectating as well as the increases in violent behavior often associated with sport spectating. When combined with the solid foundation in research and theory outlined in this article, results such as these provide some exciting future direc-tions for the study and understanding of sport spectatorship and all its many facets.

Bibliography

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EDWARD R. HIRT
NATHAN L. STEELE

Post Credited From Encyclopedia Of Communication & Information

Source Encyclopedia Of Communication & Information Page 960 to 965

Sports & Media Effects Part – 01

Sports & Media Effects Part – 01

Contributors : Edward R. Hirt , Nathan L. Steele

Since the dawn of civilization, people have enjoyed
viewing sports From the time that there was gladiatorial
combat in Rome and frenetic ball games in
the land of the Aztecs, there have been avid sport
spectators (for an excellent review of the history of
sport spectators, see Guttman, 1986). A sport spectator
is defined herein as someone who regularly
watches, listens to, or reads about sporting events.
Spectators can be further subdivided into two classifications:
direct sport consumers and indirect
sport consumers (Wann, 1997). Direct sport consumers
are individuals who are actually in attendance
at the sporting event. Indirect sport
consumers are individuals who view the event on
television, listen to it on the radio, or read about it
in the newspaper or on the Internet. This entry
focuses primarily on the reasons why indirect sport
consumership is so ubiquitous and discusses the
effects that sport fanship has on people.

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Scientists May Have Found A Way To Eradicate Painful Memories

Erase Painful Memories - Farhan OnlineMemories are wonderful little windows into the past that are of immense importance to all of us. But sometimes, a memory isn’t good and can be a source of pain. In such cases, one wishes to forget such memories but the trouble is that doing so isn’t easy at all. Now, a team of researchers might have found a way to eradicate painful memories by changing how one thinks about the “context” surrounding a certain memory.

The study included a team of researchers from Princeton University and Dartmouth College. Those who volunteered for the research were asked to memorize or forget a list of words.  To make sure that the volunteers had a context with the words they were told to memorize, they were shown pictures of landscapes in between the words. During this whole exercise, the researchers measured the brain activity of the subjects using fMRI (functional Magnetic Resonance Imaging) and made a note of the neural patterns that occurred.

Later, the volunteers were asked to recall the words on the list while their brain activity was being monitored using fMRI. What researchers found was the same neural patterns that they observed during the initial phase of experiment showing that the brain had intertwined the context (pictures of landscapes) and the memory (the words on the list). Those who failed to recall the list didn’t have the same neural patterns which were observed in the first phase.

The team is hopeful that their research will not only pave way for new researches on similar lines but will also help develop new memory therapies that will help those who have experienced traumatic events in the past or suffer from PTSD.

Understanding how the brain works, how the memories are created and retained in the brain is the first step to diagnosing and treating brain diseases that can have a crippling effect.

Post Credited From Science World

Source

Stem-Cell Plan: Bring Back Rhino Species On The Brink Of Extinction

An ambitious new project can change the fate of rhinos. An experiment, which will transform rhino tissues into egg cells and sperm, may soon be carried out to save the northern white rhinoceros in Kenya as per reports. Currently, there are only three living members of the species in the world.

Thousands of northern white rhinoceros once inhabited the central African savannahs, however at the moment there are only three rhinos of this subspecies left, all of which live in Kenya’s Ol Pejeta Conservancy but are owned by the Dvůr Králové Zoo in Czech Republic. The three rhinos called Fatu, Sudan and Najin, which are guarded round the clock, cannot breed naturally owing to a variety of reasons.

According to a report published in Nature journal, scientists have suggested an ambitious plan that will collect cells from living rhinos and frozen storage and transform them into egg cells and sperms, to save the northern white rhino from the fate of extinction. Subsequently in vitro fertilization (IVF) will be used to create embryos and revive the nearly extinct species.

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Here’s An Awesome Reason Why Pen Caps Have Holes On Top

Pen - PsvpTamilThere are times when science plays with our minds. Take, for instance, the idea that the universe is a massive hologram. Or the thought that people may have as much free will as they perceive. These are some of the most interesting ideas for sure. However, you will always notice tech apps which are simple but really essential. This goes to show how important innovation is. The hole on top of the BIC pen cap is an example.

You may not have thought about it much or even if you did, that thought would have seized as you acknowledged that it lets you properly shut the lid with no air pressure problems. Truth is that the hole also reduces the risk of death by choking. Many people are in a habit of chewing on pen lids which can cause them to be accidentally swallowed only to cause choking deaths. With a larger hole on the lid’s tip, the air flow is increased and the likelihood of people breathing it in is significantly minimized.

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