02-04-2010, 03:51 PM
ABSTRACT
The present century has been one of many scientific discoveries and technological advancements. With the advent of technology came the issue of security. As computing systems became more complicated, there was an increasing need for security.
This paper deals with cryptography, which is one of the methods to provide security. It is needed to make sure that information is hidden from anyone for whom it is not intended. It involves the use of a cryptographic algorithm used in the encryption and decryption process. It works in combination with the key to encrypt the plain text. Public key cryptography provides a method to involve digital signatures, which provide authentication and data integrity. To simplify this process an improvement is the addition of hash functions.
The main focus of this paper is on quantum cryptography, which has the advantage that the exchange of information can be shown to be secure in a very strong sense, without making assumptions about the intractability of certain mathematical problems. It is an approach of securing communications based on certain phenomena of quantum physics. There are two bases to represent data by this method depending on bit values. There are ways of eavesdropping even on this protocol including the Man “in-the-Middle attack. The quantum computers could do some really phenomenal things for cryptography if the practical difficulties can be overcome.
The present century has been one of many scientific discoveries and technological advancements. With the advent of technology came the issue of security. As computing systems became more complicated, there was an increasing need for security.
This paper deals with cryptography, which is one of the methods to provide security. It is needed to make sure that information is hidden from anyone for whom it is not intended. It involves the use of a cryptographic algorithm used in the encryption and decryption process. It works in combination with the key to encrypt the plain text. Public key cryptography provides a method to involve digital signatures, which provide authentication and data integrity. To simplify this process an improvement is the addition of hash functions.
The main focus of this paper is on quantum cryptography, which has the advantage that the exchange of information can be shown to be secure in a very strong sense, without making assumptions about the intractability of certain mathematical problems. It is an approach of securing communications based on certain phenomena of quantum physics. There are two bases to represent data by this method depending on bit values. There are ways of eavesdropping even on this protocol including the Man “in-the-Middle attack. The quantum computers could do some really phenomenal things for cryptography if the practical difficulties can be overcome.
