Category: 4. Attacks On Cryptosystems

The basic intention of an attacker is to break a cryptosystem and to find the plaintext from the ciphertext. To obtain the plaintext, the attacker only needs to find out the secret decryption key, as the algorithm is already in public domain. Hence, he applies maximum effort towards finding out the secret key used in…

The design of a cryptosystem is based on the following two cryptography algorithms − In case of proprietary algorithms, security is ensured through obscurity. Private algorithms may not be the strongest algorithms as they are developed in-house and may not be extensively investigated for weakness. Secondly, they allow communication among closed group only. Hence they…

An active attack involves changing the information in some way by conducting some process on the information. For example, Cryptography provides many tools and techniques for implementing cryptosystems capable of preventing most of the attacks described above. Assumptions of Attacker Let us see the prevailing environment around cryptosystems followed by the types of attacks employed…

In the present era, not only business but almost all the aspects of human life are driven by information. Hence, it has become imperative to protect useful information from malicious activities such as attacks. Let us consider the types of attacks to which information is typically subjected to. Attacks are typically categorized based on the…