Good Points and Inconvenience Digital Signage Displays

There is no doubt that the coexistence between different individuals, laws try to balance those actions that cannot be overcome by the individuals themselves. So that if someone has a difference of some action of another person or institution may submit your complaint to a third party (a judge), in this case by a procedure previously agreed and interpretation of laws, finally gives a resolution for or against the request.
Digital Signage
Photo Credit: Sun Group

We are currently considering that this is the most accepted method to resolve differences. However it is noteworthy that there is no perfect legal system, so there is a chance that this fails incorrectly. The decision of a judge is based on evidence that has been taken throughout the process and generally wants them to come to a scientific process for their livelihood.

Particularly within the legal proceedings one of the most important decisions is to demonstrate the identity of a person. This procedure can be found in verifying the authorship of documents. For example to find if a document was issued by an individual, the relationship between the document and the individual legally established in the handwritten signature.

For decades the handwritten signature has served to identify the authorship of documents; however this firm since their invention has resulted imperfections. Some of these are false, and the process of signature verification. Despite this the handwritten signature has served as the most accepted method for verifying the identity of a person.

The company itself has two releases, the action and the action of signing signature verification. For the first it is enough that an individual can write their name (rubric), or a particular set of characters and lines. This firm is not authorized by anyone in general, appears in the documents of identity such as a passport of the person who wants to identify with that signature and such signature is legally binding worldwide.

The action of the verification of the signature, is more complicated, however, in practice is done without care. We can see this process every day to cash a check or buy with a credit card. The process of signature verification is usually performed visually, i.e., the bank teller just compare the signature on the check with another that is in some ID or you do right there, and thus accepts or rejects signature, i.e., accept or reject the identity of the signer of the check.

For more difficult cases, a firm may be subjected to a verification procedure in litigation. This verification is ordered by a judge to say that the visual process is not enough to declare the signature cone accepted or rejected.

This procedure leads to just an expert (an expert) in signature verification. Although there is no global standard for accurately determining the signature is authenticated, the method is based on a series of tests that check the characteristics of the lines that are associated with each individual. Such characteristics are for example, the thickness of line, the inclination of the characters used, the termination of the character, the curvature of the lines, etc.

The handwritten signature is considered a biometrics, i.e. an own physical characteristic of each individual, and these moves marked characteristic signature.

As documented, with more than 75% of the tests are positive, then an expert can declare a signature as accepted. Likewise the number of tests is subjected to a firm is determined by the expert and depends on your experience in the field. These methods have been refined over time, but many of them do not correspond to deterministic methods, and rely heavily on the experience of the expert. The same groups of experts acknowledge that these procedures may have a probability of error that can reach 20%. So, that we have a procedure for verifying signature with probability of error.

It is also prudent to mention that such methods have been used for many years and therefore is naturally complicated and difficult to think that other technology can replace this shortly.

Just mention our main topic is the new technology that can replace the handwritten signature, and has been called digital signature.

In the year 1976 two American researchers discover what is called public key cryptography, and because of this, digital signature. In 1978 R. Rivets, Shamir, and L. Adelman of MIT propose to today most use digital signature method, called RSA.

This method in principle obeys the same principles as the handwritten signature, i.e., has a firm action and one signature verification. Before going to detail the method we can say that in this case the process of the signature verification is accurate, and is virtually impossible to have fakes.

As a method of explanation first mentions what is the digital signature, then give some of the advantages compared to the handwritten signature, and finally mention some of the disadvantages also. It is also prudent to mention that many of these advantages and disadvantages relate to the particular laws of each country.


Digital Signature

The digital signature is a procedure used to sign documents, particularly those documents must be in digital form, i.e., must be able to be viewed as sets of bits (zeros and ones), which are the basic elements which means any process or a computer. As mentioned earlier, there are procedures for signing and signature verification.

The first consists of the following: a document M is associated uniquely H a string of constant length (160 bits, or 20 characters). Then this string representing the document is associated with an integer (currently 1024 bits, or 128 digits), and applies a formula that depends on a parameter called the private key. The outcome of applying this formula also is a 128 digit number, which is called S, and is therefore S is the digital signature of the document M. Before proceeding we stress that this procedure depends on the private key. This private key must be associated uniquely individual way, and must be kept secret for this individual. If the private key is compromised, there is a method to unsubscribe to this private key and acquire another.

Once we sign a document, if we separate the document and signature M S. This couple is required to submit to a process of signature verification. The method of verifying the signature is to apply to the document M, the same process that associates the unique bit string H 160.

Following the signature S (1024 bits or 128 digits), is subjected to the inverse formula (signature) that is dependent on another key call public key. The result of this application is inverse function must be the same number of 1024 bits, which was submitted at the beginning of the first formula, and then from here the associated 160-bit string is retrieved and must be exactly H equal to the single chain of 160 bits. Thus the signature is accepted if the result of the latter formula is equal to the string of 160 bits obtained in this procedure.

This shows that the process of signing and signature verification, are accurate because they depend on mathematical formulas that have only a single result. This is the process of signature verification is accurate.

Moreover we also deduce that in order to forge the signature of a document we would guess a 128-digit number, it is virtually impossible to make.

On the other hand we also note that each individual should have a pair of keys, a private key (used to sign) and a public key (used to verify the signature).

This key pair must be associated uniquely to each individual, and the private key must be kept from his confidential setting, i.e., only the owner should have access to it, otherwise the public key is associated with this private However the public key must be available to any individual. The public key in practice is contained in an electronic document called a Digital Certificate.

Advantages of digital signature

Therefore, the first and foremost advantage of digital signature compared to the handwritten signature is that the verification procedure is accurate and it is practically impossible to counterfeit.

Another advantage of the digital signature is its portability, i.e., the digital signature can be performed in different parts of the world simultaneously and without witnesses.

A third advantage of the digital signature is that it can be compatible with current electronic devices. That is, the process of signing and verification are programs that can be stored on any processor contained on a smart card, a PDA, a Note Book, on a PC, etc.

Disadvantages of digital signature

Perhaps the most significant disadvantage of current digital signature against the handwritten signature is that the former is not legally valid even in many countries. Apparently this is due to a natural transition to this new technology; therefore there is reluctance in acceptance despite the great benefits it provides.

Another visible disadvantage of digital signatures is that their safety depends on the private key, that is, if the private key is compromised for any reason, then the security of the digital signature is committed, this means that can be used by unauthorized individuals and events.

A further disadvantage is that the digital signature is changing as technology advances, and this makes certain documents may be compromised. So you have to create methods to prevent this.

Finally we give a conclusion about it. Trying to be more positive in the case, and considering most reviews that have appeared in this regard we can mention that the digital signature will have a gradual acceptance in the financial and commercial processes mainly. In this transition both digital signature and handwritten coexist for a long period. Regarding the use of one or another firm, it is prudent to consider that technology should be used and exploited, therefore must consider the digital signature as the most viable alternative, and gradually take this technology to the new procedures generally make use of computers. Leave only for legally disabled, the handwritten signature cases.

On the other hand it is noteworthy that not only the digital signature appeared in the last 25 years of digital technology, we have the same issues with legal processes, we have Digital Notaries, attesting to the creation of documents or facts technology very similar to the digital signature. Also a forensic computers involved in crime analysis, and investigation of crimes using computers.


Digital signage display and technology

It is also known as Digital Media Indoor Media Digital out of Home, Digital Signage or MDOOH that innovates advertising your brand or company, leading to where the target audience is.

Modern and dynamic, digital signage has come to stay and help companies of all branches grow. Through the use of images, videos and animations, digital out of home media gives order to the good part of the outreach role in reducing the environmental impact and making your company more bold and attractive to customers.


Digital signage displays is present at all sites, facilitating communications with the public and with suppliers, employees and managers. For customers, the indoor digital media offers fast and affordable information and content, since it offers, advertisements, reports, messages and promotions can be fully disclosed within the various establishments. Save time and please your customers: make your information more clear and organized.

Provide wellness and entertainment to the public in queues and waiting rooms. The indoor digital media assists in the process of brand loyalty, because it connects your company to comfort, modernity and concern for the customer.


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Digital signage can be used in all types of enterprises and businesses, such as:

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Use the DIGITAL OUT of home media to invest in advertising itself or third parties. You can convey your brand in large concentrations of public, such as shopping centers, cinemas, supermarkets, airports, buses and elevators. It may also, within his own establishment, vehicle third-party advertising to increase your income. The possibilities are endless and the return is guaranteed.

Check out the advantages publicity transmitted in digital indoor media.


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Through the intersection of interests and the target audience of your business with the technology of our products, we offer your company the ideal solution for digital signage.