Found 359 Articles for Information Security

Suspicious email detection is a type of mailing system where suspicious users are recognized by deciding the keywords used by him. The suspicious keywords are discovered in the mails which are sent by the user. All the blocked mails are tested by the management and recognize the users who have sent such mails.Suspicious mail detection is a type of system by which suspected users are identified by recognizing the types of words. Words can be as hijacking, explosion which can be discovered in their mails which they send to others. These type of mails are tested by the admin and ... Read More

Triple DES Algorithm used by admin to encode the messages sent to the users or sent some warnings about the different user’s suspicious event. In this research, suspicious words dictionary can be used to find the suspicious words which are not generally used in the normal messaging or communication.There are some modules of Triple DES which are as follows −Admin Login − In this project, admin can get in the username and password to validate himself to access the account panel modules.User Login − In this module, users can get in their username and password to authenticate themselves to access ... Read More

Cryptography supports a number of security aims to provide the privacy of information, non-alteration of information and so on. Because of the high security benefit of cryptography it is broadly used today. There are the various goals of cryptography which are as follows −Confidentiality − Information in computer is sent and has to be approached only by the authorized party and not by anyone else. The principle of confidentiality represent that only the sender and the intended recipient(s) should be able to make the content of a message. Confidentiality have negotiated if an unauthorized person is able to make a ... Read More

Cryptography is an automated mathematical tool that plays an important role in network security. It supports the confidentiality and integrity of information and provide authentication and non-repudiation to the users.Cryptography is frequently used in distributed applications to transfer recognition and authentication information from one system to another over a network. Cryptographic authentication systems validate a user based on the awareness or control of a cryptographic key. Cryptographic authentication systems can be based on private key cryptosystems or public key cryptosystems.Cryptographic approach can encrypt the biometric templates or images which are saved in a database. It can enhance the level of ... Read More

Triple DES is also called a TDES. It is a symmetric key block cipher, defining that the same key can be used to encrypt and decrypt information in fixed-length set of bits known as blocks. It is known as "Triple DES" because it uses the DES cipher three times when encrypting data.When DES was originally invented in 1976, it need a key size of 56 bits, which was an adequate level of security to oppose brute-force attacks. Because then, computers have become economical and more strong, allowing the 3DES algorithm to use DES three times successively, essentially stopping brute-force on ... Read More

The Double DES uses two example of DES cipher for encryption and two units of reverse DES cipher for decryption. Each unit of DES cipher needs multiple key for encryption which enhance the size of the key (112 bit) creating it more secure. But in the double DES can be destroyed by known plaintext attack known as meet-in-themiddle attack.Given a plaintext P and two encryption keys K1 and K2, ciphertext C is produced as C = Ek2(Ek1, (m)) decryption needed that the keys be used in reverse order −P = Dk1(Dk2, (C))A Meet-in-the-Middle (MitM) Attack is a type of cryptanalytic ... Read More

Data Encryption Standard (DES) is a block cipher algorithm that takes plain text in blocks of 64 bits and transform them to ciphertext utilizing keys of 48 bits. It is a symmetric key algorithm. It can define that the same key can be used for encrypting and decrypting data.The design of DES was invented by IBM in 1994. There are some tests on DES have proved that it satisfies some of the required element as claimed. There are some design issued which are as follows −S-Boxes − S-Boxes is a procedure that accepts the 48-bit input from the XOR operation ... Read More

The Data Encryption Standard (DES) is a symmetric key block cipher which creates 64-bit plaintext and 56-bit key as an input and makes 64-bit cipher text as output. The DES function is create up of P and S-boxes. P-boxes transpose bits and S-boxes substitute bits to make a cipher.DES is a Feistel Block Cipher implementation, called a LUCIFER. It need a Feistel structure with 16 rounds, where a different key can be used for each round. The major reasons to understand DES (Data Encryption Standard) is that it forms the foundation for encryption algorithms. This creates it easy for one ... Read More

DES is a block cipher. The encryption procedure is create of two permutations (Pboxes) that it can be defined initial and final permutations, and 16 Feistel rounds. Each round need a different 48-bit round key created from the cipher key according to a pre-represented algorithm. The DES function uses a 48-bit key to the rightmost 32 bits (RI−1) to create a 32-bit output.There are two properties of DES which are as follows −Avalanche EffectAvalanche effect defines a small change in the plaintext (or key) should make an important change in the ciphertext. It can change in one bit of plaintext ... Read More

There are two main variations of Data Encryption Standard are as follows −Double DES − Double DES is an encryption approach which need two instance of DES on same plain text. In both instances it uses multiple keys to encrypt the plain text. Both keys are needed at the time of decryption.The 64 bit plain text goes into first DES instance which than transformed into a 64 bit middle text utilizing the first key and thus it goes to second DES instance which provides 64 bit cipher text by utilizing second key.Double DES is easy as it does that normal ... Read More