Cryptography
Cryptography is the study and practice of encoding data using transformation techniques so that it can only be decoded by specific users. In simpler words, it is a theory of secret writing. Practitioners of cryptography are known as cryptographers.
Cryptography is the technique of using mathematics, computer science and engineering to encrypt and decrypt information. It facilitates a user to store vital information or send it across insecure networks (like the Internet) so that it cannot be interpreted by any user except the intentional receiver. While cryptography is the technique of protecting information, cryptanalysis is the technique of analyzing and breaching protected communication. Traditional cryptanalysis engages a remarkable mixture of analytical reasoning, use of mathematical tools, and pattern discovery. Cryptanalysts are also known as attackers. Cryptology shelters both cryptography and cryptanalysis.
A cryptographic algorithm, or known as cipher, is a mathematical function used in the encryption and decryption method. A cryptographic algorithm functions by blending with a key to encrypt the plaintext. The plaintext can be encrypted in different ways with different keys. The security of ciphertext is completely dependent on two things: the power of the cryptographic algorithm and the confidentiality of the key. A cryptographic algorithm, all potential keys and all the protocols that make cryptography work formulate a cryptosystem.
Current cryptography methods overlap various subjects like mathematics, computer science, and engineering. ATM cards, computer passwords, and electronic commerce are few examples where cryptography is used.
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- Cryptanalysis
Cryptanalysis is the science of making encrypted data unencrypted. Cryptanalysts Practitioners of cryptanalysis are known as cryptanalysts. Cryptanalysis in Context A cryptographer will use cryptography to convert plaintext into ciphertext and a cryptanalyst will use cryptanalysis to attempt to turn that ciphertext back into plaintext. Both the cryptographer and the cryptanalyst are cryptologists. Cryptography and [...]...
- Cryptographic Libraries
Cryptography is very difficult. It is even more difficult to tell if you have done it correctly. If you design and implement your own cryptographic algorithm, the odds are that you will fail to create a secure system. It is much better to code your application to use an existing cryptographic library which has been [...]...
- Cryptology
Cryptology Cryptology is the science which incorporates both cryptography and cryptanalysis. Cryptologists Practitioners of cryptology are known as cryptologists. Cryptology in Context A cryptographer will use cryptography to convert plaintext into ciphertext and a cryptanalyst will use cryptanalysis to attempt to turn that ciphertext back into plaintext. Both the cryptographer and the cryptanalyst are cryptologists. [...]...
- PGP (Pretty Good Privacy)
PGP (Pretty Good Privacy) is a data encryption and decryption program used in e-mail messaging, encrypting/decrypting texts, files, or even disk partitions, in order to provide security of data. The program was created in 1991, by Phil Zimmerman. Pretty Good Privacy encryption is based on using a serial combination of data compression, hashing, public-key cryptography [...]...
- Cryptographic Algorithms
Symmetric Cryptographic Algorithms DES (Data Encryption Standard) is perhaps the most widely used cryptographic algorithm. DES is based upon IBM’s Lucifer algorithm. The NBS (National Bureau of Standards) and the NSA (National Security Agency) adopted DES as a federal standard in 1977. DES is a symmetric cipher with an effective key length of 56 bits. [...]...