Block cipher modes of operation Essays

Cryptography is a technique or method to secure personal data from unauthorized user. In cryptography two types of operation are performed. (i) Encryption and (ii) Decryption. To encrypt and decrypt data a secret key is used. After encryption original data is converted into another format known as cyphertext, which is not easy to understand. In the present era everyone needs fast processing and less space required to store results in computation process as well as security of information. There are

The increasing adoption of information systems in healthcare has led to a scenario where patient information security is more and more being regarded as a critical issue. Allowing patient information to be in insecure risk may lead to irreparable damage. Medical images play a crucial role in such context, given their importance in diagnosis, treatment, and research. Therefore, it is vital to take measures in order to prevent tampering and determine their source. This demands adoption of security

4. Strong collision: given a message M1, it is not possible to find two distinct messages such that h (M1’) = h (M1). The probability of this collision is 2n/2. Hash function is used in message authentication which uses a secret code before hashing so that no one else can modify the message and hash and then can encrypt the message for confidentiality. There are several ways of applying hash for message authentication: 1. One is to apply hash to the message and encrypt it and decrypt it using the

forensics community. 2.4 Challenges of Digital Forensics Digital technology evidence gathering and presentation presents challenges that are inherently different from other kinds of forensic investigations in other fields. Digital evidence is different from evidence that has been created, stored, transferred and reproduced from non-digital formats (Chaikin, 2004). In his study, he showed that the main difference between digital technology evidence and other forms of forensic science practice is