CS_UNIT 2(P3).pptx

This document discusses lightweight cryptography. It begins by defining lightweight cryptography as cryptographic primitives designed for devices with limited resources like memory, speed and power consumption. It then outlines various lightweight cryptographic mechanisms like block ciphers, hash functions, stream ciphers and authenticated ciphers. For each mechanism, it discusses their desirable properties and design principles. It also discusses implementation issues like decryption costs and resistance to related key attacks. Finally, it mentions the Fair Evaluation of Lightweight Cryptographic Systems (FELICS) benchmarking tool for evaluating and comparing the performance of lightweight cryptographic algorithms on different platforms.

This presentation gives you an overview of stages of digital forensics and where should you look for evidence.

The document discusses security challenges posed by increased use of mobile and wireless devices, including risks of malware, hacking, and data theft. It covers types of mobile devices and attacks like viruses, smishing, and vishing. It also provides recommendations for securing mobile devices like using passwords, encryption, and anti-theft tracking software.

This slide explains the design part as well as implementation part of the firewall. And also tells about the need of firewall and firewall capabilities.

The document discusses active and passive network attacks. An active attack intercepts network connections to alter message content, potentially changing system resources, while a passive attack observes and copies messages without altering them, so the victim is not notified. Common active and passive attacks are man-in-the-middle attacks and packet sniffing, respectively. The document also provides tips for preventing security attacks like keeping software updated and using firewalls and strong passwords.

Vulnerabilities are weaknesses that attackers can exploit to gain unauthorized access to a network or its resources. Attacks are attempts to damage, access, or misuse assets without permission. Network security mechanisms detect, prevent, and recover from attacks using methods like routing control, traffic padding, encryption, access control, digital signatures, and ensuring data integrity.

This document discusses various cybercrimes and security issues related to mobile and wireless devices. It describes how criminals plan cyber attacks using techniques like social engineering, malware distribution, and exploiting vulnerabilities. Specific cybercrimes addressed include phishing, cyber stalking, crimes at cyber cafes, and the use of botnets. The document also covers attack vectors, the proliferation of mobile devices, and security challenges they pose like data leakage and malware. Recommendations are provided for protecting devices and networks from these threats.

This document describes a project to develop an intrusion detection system using data mining techniques. It discusses approaches to intrusion detection including signature-based and anomaly-based methods. For the project, a hybrid network-based and host-based intrusion detection system is proposed. Data preprocessing and mining techniques including clustering, outlier detection, and classification are applied to network packet data and system call logs to detect attacks.

This document discusses firewalls and their types and functions. It defines a firewall as a system used to control access between trusted and untrusted networks using pre-configured rules. There are two main types of firewalls - hardware firewalls which are physical devices that protect entire networks, and software firewalls which are applications installed on individual computers. The document also outlines several firewall techniques including packet filtering, application gateways, circuit-level gateways, and bastion hosts. It provides examples of what personal firewalls can and cannot do to protect individual computers.

This PPT explains about the term "Cryptography - Encryption & Decryption". This PPT is for beginners and for intermediate developers who want to learn about Cryptography. I have also explained about the various classes which .Net provides for encryption and decryption and some other terms like "AES" and "DES".

Cybercrime involves illegal activities carried out using digital technology, often with criminal intent. Information security focuses on protecting systems and data from cyber threats. The Indian IT Act defines cybercrimes like hacking, data theft, and cyberbullying and prescribes penalties. It has undergone amendments to address new technologies. Other countries also have their own laws regulating electronic transactions, data protection, and cybersecurity.

This document summarizes classical encryption techniques such as secret key cryptography, stream ciphers, block ciphers, substitution techniques like the Caesar cipher and Playfair cipher, polyalphabetic ciphers like the Vigenère cipher, and the theoretically unbreakable one-time pad cipher. It explains the basic components and workings of these classical encryption schemes.

This document discusses steganography, which is hiding messages within seemingly harmless carriers or covers so that no one apart from the intended recipient knows a message has been sent. It provides examples of steganography in text, images, and audio, as well as methods used for each. These include techniques like least significant bit insertion and temporal sampling rates. The document also covers steganalysis, which aims to detect hidden communications by analyzing changes in the statistical properties of covers.

Digital forensics is the preservation, identification, extraction and documentation of computer evidence for use in courts. There are various branches including network, firewall, database and mobile device forensics. Digital forensics helps solve cases of theft, fraud, hacking and viruses. Challenges include increased data storage, rapid technology changes and lack of physical evidence. Three case studies showed how digital forensics uncovered evidence through encrypted communications, text messages and diverted drug operations. The future of digital forensics includes more sophisticated tools and techniques to analyze large amounts of data.

Social engineering and phishing attacks are the largest threats to companies, as attackers are increasingly relying on tricking users to gain access to systems. Mobile malware and internet-connected devices are also growing vulnerabilities, as more business is conducted and data is stored on mobile and cloud systems. Companies need to invest in protections against these emerging threats like social engineering, mobile malware, cloud vulnerabilities, and weaknesses in the growing Internet of Things. Staying ahead of changing attack types can help reduce vulnerabilities, but protecting against current and future risks is a ongoing challenge.

This document discusses cyber forensics and investigating large scale data breaches. It begins by defining cyber forensics as an electronic discovery technique used to determine and reveal technical criminal evidence, often involving extracting electronic data for legal purposes. It then discusses challenges in investigating corporate networks due to different operating systems, file systems, and administrative access used. When investigating large data breaches, security exploits and employee devices are common entry points, while pace of growth and lack of evidence erasure complicate progress. The Yahoo breach example turned tides by providing data to investigators that aided geopolitical understanding. Immediate actions include response and isolation, while tools like COFEE, SIFT, and ProDiscover aid forensic analysis at different levels.

Hi friends, Here is the ppt on what is cryptography and types of attacks with an in-depth explanation of every topic in it.

This document discusses security challenges related to mobile and wireless devices. It covers the proliferation of these devices and trends in mobility. Some key security issues addressed include malware attacks on mobile networks, credit card fraud, and technical challenges like managing registry settings, authentication, cryptography, and securing APIs. The document emphasizes that properly configuring baseline security is important to address many mobile security issues.