In the name of Allah ,the most gracious most merciful
Here is a mathematical proof about originality of Quran
The Universe is beased on mathematics .
One of the miracles of the Quran. This is just the beginning.
Some type of checksum is used to guaranty authenticity in Quran.
Supercomputers were not available 1400 years ago .
It is impossibble to build with supercomputers.
At the same time Questions and Problems of people were answered
during Revelation. It was a divine program .
In Quran there is a challenge to build a similar surah.
And there is assurance that it won t be changed.
Try to change couple words and the checksums will fail.
Web definition of checksum: taken from google
A value that is computed and that depends on the contents of a set of data. Checksums are stored or transmitted with the data. The checksum is used to detect if the data has been altered during transmission or when being stored and retrieved. Receiving programs recompute the checksum to compare with the checksum sent or stored with the data. Checksums may be more than one digit. They are not always the result of addition but may be the result of one or more computations involving addition, subtraction, multiplication, or division.
http://powerpassion.net/?life/truth/checksums.html
The Certain Truth:
Checksums in the Holy Qur'an
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What are checksums?
Whenever a web-page, email or picture is sent over the Internet, the computer sending it splits it up into small packets and then adds something called a checksum to the end of each packet before sending it. This checksum is simply a number formed by adding up all the numerical codes for each letter in the packet. The purpose of this checksum is for the receiving computer to be sure that the information has been transmitted correctly. To do this, the receiving computer simply does the same addition of all the received letters, and then compares it with the checksum sent with the packet. If they do not match, the computer concludes that an error has occurred along the way in this packet and asks the sender to transmit it again. This is why you very rarely, if ever, get emails that you can't read or pictures that are messed up.
You can see another similar idea if you have a credit card. Your credit card number is made up of 16 digits. The last 4 digits are also a checksum made up by peforming a complex calculation using the first 12 digits. Whenever you use your credit card, the computer processing the transaction computes the checksum using the first 12 digits and then compares it to the last 4 digits to make sure your credit card is not fake.
This concept of checksums is very familiar to students of computer science, information theory and electrical engineering. It is a very common way of preserving the accuracy of transmitted messages, and if you ask these students, they will tell you the following:
It is very rare that a message with an error will get through this system undetected. In fact, the only way that can happen is if both the checksum and the message are changed in a very precise way so that the bad checksum is still obtained from adding up the letters of the bad message.
Even if that happens, you will find that the message becomes meaningless (you will see something like "jK# X.y%d3" instead of "I love you") and you know for sure that it is corrupted.
If you give a really clever information theory student a checksum, and you ask him to make up a meaningful message that adds up to that checksum, he probably can't do it, and it gets impossible as the size of the message and the size of the checksum get bigger.
If you give him a message made up of a few lines with a correct checksum, and then ask him to intentionally modify the message any way he chooses so that it is still meaningful and still gives the same checksum, he will probably laugh at your ignorance and walk away, since what you're asking is quite impossible.
A message from God
God sent us a message. In fact, it is the most important message we will ever receive. With a message this important to deliver to us, don't you think God would want to make sure this message was received correctly, unchanged and undamaged? It's only logical that a wise, caring, merciful, fair and omnipotent God would have to, not only preserve this message for us, but also let us know that it reached us uncorrupted and that it is from nobody else but Him . So God used checksums.
You can read from the link
http://powerpassion.net/?life/truth/checksums.html
Best regards