Cryptography is technique of securing information and communications through use of codes so that only those person for whom the information is intended can understand it and process it. Thus preventing unauthorized access to information. The prefix “crypt” means “hidden” and suffix graphy means “writing”.

In Cryptography the techniques which are use to protect information are obtained from mathematical concepts and a set of rule based calculations known as algorithms to convert messages in ways that make it hard to decode it. These algorithms are used for cryptographic key generation, digital signing, verification to protect data privacy, web browsing on internet and to protect confidential transactions such as credit card and debit card transactions. 

Features Of Cryptography are as follows:

1. Confidentiality: Information can only be accessed by the person for whom it is intended and no other person except him can access it.
2. Integrity: Information cannot be modified in storage or transition between sender and intended receiver without any addition to information being detected.
3. Non-repudiation: The creator/sender of information cannot deny his intention to send information at later stage.
4. Authentication: The identities of sender and receiver are confirmed. As well as destination/origin of information is confirmed.

How to improve knowledge skills

Cryptography professionals need to have a strong understanding of mathematical principles, such as linear algebra, number theory, and combinatorics. Professionals apply these principles when they are designing and deciphering strong encryption systems.

The positive power of cryptography

Cryptography can be used for access control to ensure that only parties with the proper permissions have access to a resource. Only those with the correct decryption key can access the resource thanks to encryption.