Encrypt “The key is hidden under the door” using playfair cipher with keyword “domestic”.
Playfair Matrix: D O M E S T I C A B F G H K L N P Q R U V W X Y Z Encrypted Message: CFARAEBOGCMVOSPNVTAYCFSOMWEP
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Describe services and mechanisms in CSS
Security services A processing or communication service that enhances the security of the data processing systems and the information transfers of an organization. These services are intended to counter security attacks, and they make use of one or more security…
Briefly explain database security.
Database security involves implementing measures to protect a database from unauthorized access, data corruption, and other threats. Its requirements include ensuring confidentiality, integrity, availability, and accountability of the data within the database. Confidentiality: Data should only be accessible to authorized…
List and explain characteristics needed in secure hash function.
Properties/ characteristics of hash functions To be a reliable cryptographic tool, the hash function should have the following charactersitcs − Pre-Image Resistance According to this feature, reversing a hash function should be computationally difficult. In other words, if a hash…
d. List and explain security requirements of database.
A database is an organized collection of structured data stored electronically in a computer system. It is designed to efficiently manage, retrieve, and manipulate large volumes of data for various purposes. Databases are commonly used in businesses, organizations, and applications…
Enlist various functions of protocols of SSL.
Secure Socket Layer (SSL) provides security to the data that is transferred between web browser and server. SSL encrypts the link between a web server and a browser which ensures that all data passed between them remain private and free from…
List and explain vulnerabilities in windows operating system
Windows operating systems have been targeted by various types of vulnerabilities over the years. Here are some common vulnerabilities found in Windows OS along with brief explanations: Buffer Overflow: Buffer overflow vulnerabilities occur when a program attempts to store more…
Give the format of X.509 digital certificate and explain the use of a digital signature in it
An X.509 digital certificate is a standard format for public key certificates used in various internet protocols, such as TLS/SSL for secure communication, S/MIME for secure email, and others. It contains information about the entity it identifies, along with the…
Explain with suitable example how the Term Frequency
Term Frequency-Inverse Document Frequency (TF-IDF) is a statistical measure used in information retrieval and text mining to evaluate the importance of a term within a document relative to a collection of documents. It helps in quantifying the relevance of a…
Suppose everyone who visits a retail website gets one promotional offer or no promotion at all.
For analyzing whether making a promotional offer makes a difference in visitor behavior on a retail website, you can use a hypothesis test, specifically a chi-squared test for independence. This test allows you to determine whether there is a statistically…