Matsumoto Hidden

(teased hair) How would you ask for this type of hairdo? Hide Matsumoto?

http://www15.brinkster.com/rubberhosemix/piccies/hide142.jpg
Hideto has really nice fashionable hairdo, what would i tell my hairdresser to do with my hair if i wanted it like his? Besides showing the photo, is there some type of technique to cutting it that way? Maybe Long layers?

It looks like a razor cut with that spike feel to it. However, it appears that a styling product of some sort was used to hold the hairstyle.

Computer security and its role

INTRODUCTION

The paper explores the role of the password, anti virus and encryption data in computer security. It has been argued that the passwords are known to be old. Sentinels would challenge those wishing to enter an area or approach it send a password or key word. Sentinels only allow one person or group to pass if they knew the password. In modern times, user names and passwords are commonly used by people during a search in the process that controls access to the protection of computer operating systems, mobile phones, cable TV decoders, automated teller machines (ATM), etc. Data encryption refers to the mathematical calculations and algorithms that transform systems plaintext into ciphertext, a form that is not readable by unauthorized persons. The recipient of a message encrypted using a key that activates the algorithm for decrypt the data, transforming the original plain text version.

Finally, another important document is security software, computer viruses, a computer program that can copy itself and infect a computer without permission or knowledge of the owner. The term "virus" also commonly, but erroneously used to refer to other types of malware, adware and spyware that have no reproductive capacity. A true virus can not spread from one computer to another (in some form of executable code) when its host is taken to the target computer, for example because a user sent a network or Internet, or took him, on removable media, such as a diskette, CD, DVD or USB stick.

MAIN BODY

A password is a secret word or character string that is used for authentication, to prove their identity or access to a resource (Example: A passcode is a type of password). The password should be kept secret from those not allowed access.

The use of passwords is known for being old. Sentinels would challenge those who wish to enter an area or approach to send a password or key word. Sentinels only allow a person or group to pass if they knew the password. In modern times, the user names and passwords are commonly used by people during a search in the process that controls access to protected computer operating systems, mobile phones, cable TV decoders, automated teller machines (ATM), etc. typical computer can make use of passwords for many purposes: to access to computer accounts, e-mail recovery of servers, software access to databases, networks, websites, and even read the morning newspaper online.

Despite the name, there is no need for passwords to words real, in fact passwords are not real words may be more difficult to guess, a desirable property. Some passwords are composed of several words more accurately and can be called a passphrase. The access code word is sometimes used when the secret information is purely numerical, such as personal identification number (PIN) commonly used for ATM access. Passwords are usually short enough to be easy to remember and spell.

For purposes of the strongest identity authentication of a computing device to another, passwords are major drawbacks (can be stolen, forged, neglected, etc.) during authentication of cryptographic protocols based systems that are more difficult to circumvent. The original password concept has been proven to be unsafe. There have been cases where the passwords have been compromised without a users knowledge through coercion, or because they were tricked into revealing it. The main problem with passwords is that legacy is very difficult or impossible for an administrator or a system to differentiate between a legitimate user and accessible through illegitimate the same password. Because of this inherent flaw in the original password system, authentication two factors was invented.

A password is "something you know". This information is understood to be known by a single individual. Two systems authentication, add another factor, "something you have" electronic card key fob electronic token, dongle, or some other physical item keep in a safe place when not in use. A common position for replacing the second factor when you need high levels of security is "something it is ". A biological fingerprint, retina pattern, the person's weight, specific vital signs or a combination of these items is used in place the electronic device. The biological factor for authentication and authorization has been found to be reliable, but not the permissions that should not be permitted when used correctly, but because there is a tendency for legitimate users to deny access due to illness, changes in the physical body, or other disabilities.

There are two methods of authentication when users use electronic components for two-factor authentication, single response and challenge-response systems.

Responsiveness of systems that only require a user to present your electronic device to a electronic reading system, or to introduce the data displayed on the electronic device without user intervention. The user must provide a user name or PIN is not known to outsiders, and then enter the specific credential data generated by the electronic device when prompted. In many cases, this mechanism, the user returns to a single factor authentication, where the user need not know anything, but only has the item in question. An example of this is the standard electronic card key used to enter a facility or building perimiter. The user does not provide anything else to prove your identity.

Challenge-response systems require the user to enter a specific password or pin on the first electronic device before the device responds with appropriate data access credentials. This alternative would always be considered two-factor authentication because the user must provide both "something you know" (PIN) and use "something haves "(the electronic device).

Both the response of only challenge and response systems can be defeated if the user highlights both the private information they keep secret, such as your user name or PIN code, and the attacker has the property of electronic devices. Due to this weakness, bioligcal factor was invented.

Biological factors that have been in use for decades and have proven reliable and secure ways to prevent users unauthorized access to systems of safety or the environment, regardless of the privacy of their passwords used. Tracking systems fingerprints, the retina of the eye, weight, temperature and other biological signals to determine the authenticity of the user requesting access. The films have been selling methods of defeating these systems by cutting off body parts, wearing masks of the retina, or forcing legitimate users to bypass authentication mechanisms for the attacker. These are largely Hollywood schemes rarely work in the real world. In most cases where this level of security is required, local or remote control of entry points through cameras and security personnel is common. Portals of stagnation, remote controlled magnetically activated doorways, and idenfitication visual are the norm.

Many simple methods have been devised to defeat biological factor weakly designed systems, so make sure you thoroughly test security measures it plans to launch before the application.

The easier it is for a password for the owner to remember usually means it will be easy for a hacker to guess. Passwords that are hard to remember that reduce the security of a system because (a) users may need to write down or electronically store the password, (b) users have to reset your password frequently and (c) users are more likely to reuse the same password. Similarly, the stricter requirements that the intensity of the password, for example, "have a mix of uppercase and lowercase letters and digits "or" monthly change, the greater the degree to which users subvert the systemIn Jeff Yan et al. examine the effect of counseling provided to users about choosing a good password. They find that passwords based on the thought of a phrase and take the first letter of each word, are as memorable as naively selected passwords, and just as difficult to swallow, as randomly generated passwords. The combination of two words no connection is another good method. Having a staff designed "algorithm" to generate passwords dark is another good method.

However, asking users to remember a password for a "combination of case" is like asking to remember a sequence of bits: hard to remember, and only a little tougher nut to crack (for example, only 128 times harder to swallow for 7-letter passwords least, if the user simply capitalizes the first letter). Asking users to use "letters and digits" often lead to easy to guess the replacements as 'E' -> '3 'and' I '-> '1', substitutions are well known to crackers. Similarly write the password of an upper row of the keyboard is a common trick knows that the cookies.

Factors in the security of a password system

The security of a password-protected system depends on several factors. The overall system must, of course, be designed for sound security, with protection against computer viruses, the man-in-the-middle attacks and the like. Physical security issues are also a concern, since deter shoulder surfing to more sophisticated physical threats, such as video cameras and keyboard sniffers. And, of course, Passwords should be chosen to ensure that it is difficult for an attacker to guess and difficult for an attacker to discover any (and all) of the auto-attack systems available. See force password, computer security and computer insecurity.

Provisions Effective access control can be forced to take extreme measures on criminals seeking to acquire a password or biometric token. Less extreme measures include extortion, the rubber hose cryptanalysis, side channel attack,

DATA ENCRYPTION

Data encryption refers to the mathematical algorithmic calculations and systems that transform plain text into cipher text, a form that is not readable by unauthorized persons. The recipient of an encrypted message uses a key that activates the algorithm to decrypt the data, transforming the original plain text version.

Before the Internet, data encryption is rarely used by the public, since it was more of a tool of military security. With the prevalence of online shopping, banking and other services, including basic home users are now aware of data encryption.

Nowadays web browsers automatically encrypt the text to make a connection to a secure server. This prevents intrusion into private communications stream. Even if they can get the message, encryption allows encrypted text only watching or what many call an indecipherable gibberish. On arrival, the data is decoded, allowing the recipient to view the message in its original form.

The types of data encryption

There are many different types of data encryption, but not all are reliable. At first, 64-bit was thought to be strong, but I was wrong with the introduction of 128-bit solutions. AES (Advanced Encryption Standard) is the new standard and allows a maximum of 256-bits. In general, the stronger the team the best opportunity to break a pattern of data encryption.

Data encryption schemes generally fall into two categories: symmetrical and asymmetrical. AES, DES and Blowfish algorithms use symmetric key. Each system uses a key that is shared between the sender and recipient. This key has the ability to encrypt and decrypt data. With asymmetric such as Encryption Diffie-Hellman and RSA key pair is created and assigned, a private key and public key. The public key can be known by anyone and is used to encrypt the data to be sent to the owner. Once the message is encrypted, it can only be decrypted by the owner of the private key. Asymmetric encryption is said to be a little more secure than symmetric encryption as the private key is not to be shared.

Strong encryption such as SSL (Secure Sockets Layer) and TLS (Transport Layer Security) keep the data private, but can not always guarantee safety. Websites using this kind of data encryption can be verified by monitoring the digital signature in his medical certificate to be validated by an approved CA (Certificate Authority).

Encryption with a variable number of

One method most advanced is the use of encryption to encrypt the virus simple. In this case, the virus consists of a small decrypting module and an encrypted copy of the virus code. If the virus is encrypted with a different key for each infected file, the only part of the virus that remains constant is the decoding module, which (for example) is appended to it. In this case, a virus scanner can not detect directly the virus through signatures, but can still detect the decrypting module, which still makes indirect detection of the virus possible. Since these keys would be symmetrical, stored on the infected machine is in fact entirely possible to decrypt the final virus, but probably not necessary, since the amendment of open source is a rarity that can be cause of virus scanners, at least, mark the file as suspect.

An old, but compact, encryption involves XORing each byte in a virus with a constant, so that the exclusive-or operation had only to be repeated for decryption. He is suspected

VIRUS

A computer virus is a computer program which can copy itself and infect a computer without permission or knowledge of the owner. The term "virus" is also commonly, but erroneously used to refer to other types of malware, adware and spyware programs are not capable reproductive. A true virus can not spread from one computer to another (in some form of executable code) when its host is taken to the target computer, for example, because a user sent over a network or Internet, or took him, on removable media, such as a diskette, CD, DVD or USB stick. Viruses can increase their chances of spread to other computers by infecting files on a network file system or file system that is accessed by another computer. (Fred Cohen) The term "computer virus" is sometimes used as a phrase used to include all types of malware. Malware includes viruses, worms, Trojan horses, most rootkits, spyware, adware dishonest, crimeware, and malicious and unwanted software), including true viruses. Viruses are sometimes confused with worms and Trojan horses, which are technically different. A worm can exploit security vulnerabilities to spread to other computers without needing to be transferred as part of a host, and a Trojan horse is a program that seems harmless, but has a hidden agenda. Worms

Methods to avoid detection

In order to avoid detection by users, some viruses use different types of deception. Some old viruses, especially in MS-DOS platform, make sure that the "last modified" date of a file host is the same when the file is infected by the virus. This approach is not playing the anti-virus software, however, especially those who maintain and control the date of cyclic redundancy in the file changes.

Some viruses can infect files without increasing its size or damage files. They accomplish this by overwriting areas not used for executable files. These are called cavity viruses. For example the CIH virus, or Chernobyl virus, infects portable executable files. Because the files have many empty gaps, the virus, which was 1 KB in length, not add the file size.

Some viruses try to avoid detection by killing the tasks associated with antivirus software before it can detect.

As computers and operating systems become larger and more complex techniques for hiding old need to be updated or replaced. Defending a computer against viruses may demand that a file system migrate to the explicit permission and detailed for each type of file access. (T Matsumoto).

Avoiding bait files and other unwanted guests

A virus needs to infect computers with the aim of further spread. In some cases it might be a bad idea to infect a host program. For example, many programs to combat the virus to make A check on the integrity of its own code. Such programs Infection thereby increase the likelihood that the virus has been detected. For this reason, some viruses are programmed not to infect programs that are known to be part of anti-virus software. Another type of host that viruses sometimes avoid file is the bait. "bait files files goat (or) are files that have been specially created by anti-virus software, or antivirus professional themselves to be infected by a virus. These files can be created for various reasons, all of which are related to detection of the virus:

Anti-virus professionals can use bait files to take a sample of a virus (ie, a copy of a program file that is infected by the virus). Indeed practical to store and exchange a small infected bait file, which in exchange for a large application program that has been infected by the virus.

Anti-virus professionals can use bait files to study the behavior of a virus and evaluate detection methods. This is especially useful when the virus is title = "Polymorphic Code"> polymorphic. In this case, the virus can do to infect a large number of bait files. Infected files can be used to test if an antivirus detects all versions of the virus.

Some anti-virus software employs bait files that are accessed regularly. When you modify these files, the anti-virus software warns the user that a virus is probably active in the system.

Since bait files are used to detect the virus, or to possible detection of a virus can infect not benefit from them. Viruses usually do this by avoiding suspicious programs, such as small program files or programs containing certain patterns of 'garbage instructions.

A related strategy is difficult to lure poor infection. Sometimes not limited infectors infect a host file to be a suitable candidate for infection in other circumstances. For example, a virus may decide on an randomly either to infect a file or not, or a virus can only infect host files on particular days of the week.

Stealth

Some viruses try to trick anti-virus software by intercepting its requests to the operating system. A virus can be hidden by intercepting the application of anti-virus software To read the file and pass the request to the virus, rather than the operating system. The virus may become infected with a version file for anti-virus software, so it seems that the file is "clean". Modern anti-virus software employs various techniques to counter stealth mechanisms of viruses. The only method totally reliable to avoid stealth is to boot from a medium that is known to be clean.

Auto-change

Most modern programs antivirus trying to find patterns of virus in the regular programs scan them for so-called virus signatures. A signature is a characteristic pattern byte which is part of a given virus or virus family. If a virus scanner finds a pattern in a file, notifying the user that the file is infected. Member can erase, or (in some cases) "clean" or "cure" the infected file. Some viruses use techniques that make detection by the firms difficult, but probably not impossible. These viruses modify their code on each infection. That is, each infected file contains a different variant of the virus.

Code changes, so the code to perform encryption / decryption can be part of the signature in many virus definitions.

Code Polymorphic

Polymorphic code was the first technique that posed a serious threat to virus scanners. As systems encrypted viruses, a polymorphic virus infects files with an encrypted copy of itself, which is decoded by a decryption module. In the case of polymorphic viruses however, this decryption module also changes in each infection. A well written polymorphic virus therefore has no parts which remain identical between infections, making it very difficult to detect directly through signatures. Antivirus software can detect viruses decrypt using an emulator, or by statistical pattern analysis of the encrypted virus body. To enable polymorphic code, the virus must have a polymorphic engine (also called mutation or mutation engine) somewhere in its encrypted body. See Polymorphic code for technical details about how these viruses operateSome engines employ polymorphic code in a way that limits the rate of mutation virus significantly. For example, a virus could be programmed to mutate only slightly over time, or can be programmed to refrain from changing when infects a file on a computer that already contains copies of the virus. The advantage of this slow polymorphic code is that it makes it harder for anti-virus professionals to obtain samples representative of the virus, because bait files that were infected in a race typically contain identical or similar samples of the virus. This will make it more likely that detection by the antivirus will be unreliable, and that some cases of the virus may be able to avoid detection.

Metamorphic Code

To avoid being detected by emulation, some viruses completely rewrite every time new executable files to infect. Viruses that use this technique is said to are metamorphic. To enable metamorphism, a metamorphic engine is needed. A metamorphic virus is usually very large and complex. For example, W32/Simile comprised over 14,000 lines of code in assembly language, 90% of which is part of the metamorphic engine.

Conclusion

As more users come to understand the open nature of the Internet and the dangers of surfing the net, the application of data encryption for communications common, such as email and instant messaging are likely to be more popular. Without this safety mechanism, the information conveyed through Internet can be easily captured and viewed by listening to anybody. This critical information can be compromised in a number of ways, especially when stored on servers that could change hands in recent years. Considering how damaging crimes such as identity theft is increasing, data encryption is well worth pursuing.

About the Author