Cryptography ppt by vaishnavi khandelwal
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Cryptography is the science and art of securing messages through techniques that transform plaintext into ciphertext. There are two main categories of cryptography: symmetric key cryptography which uses the same key for encryption and decryption, and asymmetric key cryptography which uses separate public and private keys. Cryptography aims to provide security goals such as confidentiality, integrity, non-repudiation and availability of data through the use of encryption algorithms, keys and ciphers.
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Cryptology - The practice and study of hiding information
First presentation of a Cryptography series, it aims to provide a high level overview of cryptography, clarify its objectives, define the terminology and explain the basics of how digital security systems, like Bitcoin, are built.
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Cryptography.ppt
This document provides an overview of cryptography. It begins with basic definitions related to cryptography and a brief history of its use from ancient times to modern ciphers. It then describes different types of ciphers like stream ciphers, block ciphers, and public key cryptosystems. It also covers cryptography methods like symmetric and asymmetric algorithms. Common types of attacks on cryptosystems like brute force, chosen ciphertext, and frequency analysis are also discussed.
Cryptography
The document discusses various topics in cryptography including symmetric and asymmetric encryption algorithms. Symmetric algorithms like DES use a shared key for encryption and decryption while asymmetric algorithms like RSA use public-private key pairs. Digital signatures can be generated by encrypting a document hash with a private key and verified using the corresponding public key. Cryptography ensures security goals like confidentiality, integrity, authentication and non-repudiation of digital communications.
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This document provides an introduction to cryptography. It discusses security goals like confidentiality and integrity. Cryptography is defined as transforming messages to make them secure. There are two main types: symmetric key cryptography where the same key is used to encrypt and decrypt, and asymmetric key cryptography where different public and private keys are used. Basic cryptography terms like cipher, ciphertext, encryption and decryption are also explained. Examples of cipher types like substitution and transposition ciphers are given. Applications of cryptography include defense, e-commerce, and data security.
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This document discusses the science of encryption through three main topics: the purpose and history of cryptography, modern cryptography techniques, and password security. It describes cryptography as the science of secure communications and its goals of authentication, privacy, integrity, and non-repudiation. The history of cryptography is divided into ancient uses and electro-mechanical machines of World War II. Modern techniques discussed are secret key cryptography, hash functions, and public key cryptography. It emphasizes the importance of strong, unique passwords for security.
Caesar cipher
Our team worked on a Cryptography project. Our project was designed to convert a normal message or text to private and secure cipher text to maintain confidentiality and security in both corporate and national security. Here the plain text is converted into cipher text through a web platform where the user submits the confidential plain text and get the cipher text for the corresponding plain text.
Cryptography basices
Cryptography is the practice and study of techniques for secure communication in the presence of third parties. It involves encrypting plaintext messages into ciphertext that can only be decrypted by authorized parties. There are two main categories of cryptography: symmetric key cryptography which uses the same key for encryption and decryption, and asymmetric key cryptography which uses separate public and private keys. Network security relies heavily on cryptography to protect data transmission over the internet.
Cryptography ppt
This document discusses cryptography, which is the science of secure communication. It covers the basics of cryptography including its objectives, components, terminology, types, and advantages. Specifically, it explains how cryptography ensures confidentiality, integrity, and authentication of information. It also discusses symmetric and asymmetric encryption methods. Symmetric encryption uses a shared key for encryption and decryption while asymmetric encryption uses public and private key pairs. The document highlights how cryptography provides secure communication methods and is important for both military and everyday applications.
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Cryptology - The practice and study of hiding information
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Cryptography.ppt
This document provides an overview of cryptography. It begins with basic definitions related to cryptography and a brief history of its use from ancient times to modern ciphers. It then describes different types of ciphers like stream ciphers, block ciphers, and public key cryptosystems. It also covers cryptography methods like symmetric and asymmetric algorithms. Common types of attacks on cryptosystems like brute force, chosen ciphertext, and frequency analysis are also discussed.
Cryptography
The document discusses various topics in cryptography including symmetric and asymmetric encryption algorithms. Symmetric algorithms like DES use a shared key for encryption and decryption while asymmetric algorithms like RSA use public-private key pairs. Digital signatures can be generated by encrypting a document hash with a private key and verified using the corresponding public key. Cryptography ensures security goals like confidentiality, integrity, authentication and non-repudiation of digital communications.
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This document provides an introduction to cryptography. It discusses security goals like confidentiality and integrity. Cryptography is defined as transforming messages to make them secure. There are two main types: symmetric key cryptography where the same key is used to encrypt and decrypt, and asymmetric key cryptography where different public and private keys are used. Basic cryptography terms like cipher, ciphertext, encryption and decryption are also explained. Examples of cipher types like substitution and transposition ciphers are given. Applications of cryptography include defense, e-commerce, and data security.
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This document discusses the science of encryption through three main topics: the purpose and history of cryptography, modern cryptography techniques, and password security. It describes cryptography as the science of secure communications and its goals of authentication, privacy, integrity, and non-repudiation. The history of cryptography is divided into ancient uses and electro-mechanical machines of World War II. Modern techniques discussed are secret key cryptography, hash functions, and public key cryptography. It emphasizes the importance of strong, unique passwords for security.
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Cryptography is the practice and study of techniques for secure communication in the presence of third parties. It involves encrypting plaintext messages into ciphertext that can only be decrypted by authorized parties. There are two main categories of cryptography: symmetric key cryptography which uses the same key for encryption and decryption, and asymmetric key cryptography which uses separate public and private keys. Network security relies heavily on cryptography to protect data transmission over the internet.
Cryptography ppt
This document discusses cryptography, which is the science of secure communication. It covers the basics of cryptography including its objectives, components, terminology, types, and advantages. Specifically, it explains how cryptography ensures confidentiality, integrity, and authentication of information. It also discusses symmetric and asymmetric encryption methods. Symmetric encryption uses a shared key for encryption and decryption while asymmetric encryption uses public and private key pairs. The document highlights how cryptography provides secure communication methods and is important for both military and everyday applications.
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Cryptography is the art and science of securing communication and information by encoding messages so that they are unintelligible to unauthorized parties. It involves techniques for encrypting and decrypting messages to ensure confidentiality, authentication, and integrity. The document defines key terminology related to cryptography such as encryption, decryption, plaintext, ciphertext, and cryptanalysis. It also discusses different types of cryptographic techniques including symmetric and asymmetric encryption as well as cryptographic applications and characteristics.
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Cryptography is the practice of securing communications and data through encryption techniques. It aims to achieve authentication, privacy, integrity, and non-repudiation. The development of computers allowed for more complex encryption of digital data. There are different types of cryptography including secret key cryptography which uses a single key, and public key cryptography which uses different keys for encryption and decryption. Cryptography provides a secure way to transmit data and is necessary for communications over untrusted networks like the Internet.
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Cryptography is the science of keeping information secret. It allows for confidentiality, authentication, integrity, and nonrepudiation. There are two main types of encryption algorithms: symmetric which uses a single shared key, and asymmetric which uses a public/private key pair. Hashing algorithms are used to verify integrity rather than keep information secret. Common symmetric algorithms include AES and DES, while RSA and DSA are examples of asymmetric algorithms. Cryptanalysis involves attempting to break or bypass cryptography. Cryptography should be used anywhere secret communication or stored data is needed such as in SSL, VPNs, and encrypted file systems.
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This document provides an overview of cryptography. It begins by defining cryptography as the science of encrypting and decrypting written communications. It then discusses the history of cryptography dating back to ancient Egypt and the Spartans. The document outlines some common cryptosystem services like confidentiality, integrity, and authentication. It also discusses key concepts like keyspace, symmetric and asymmetric encryption algorithms like AES and RSA, and hybrid encryption approaches. The presentation concludes by thanking the audience and offering to answer any questions.
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The document discusses the basics of cryptography including its components, categories, and types of cryptographic algorithms. It covers symmetric-key cryptography which uses the same key for encryption and decryption. It also discusses traditional ciphers like substitution and transposition ciphers as well as modern ciphers. Asymmetric-key cryptography which uses public and private key pairs is also summarized. The document concludes with an overview of network security goals like confidentiality, integrity, authentication, and non-repudiation.
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Cryptography is used to protect information by encrypting messages into an unreadable cipher text format. Modern cryptography uses either secret key cryptography, which uses a single key for encryption and decryption, or public key cryptography, which uses two mathematically related keys with one key to encrypt and the other to decrypt. The purpose of cryptography and security is to defend against hackers, industrial espionage, and to secure e-commerce, bank accounts, intellectual property, and avoid liability.
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This document provides an overview of cryptography. It defines cryptography as the science of securing messages from attacks. It discusses basic cryptography terms like plain text, cipher text, encryption, decryption, and keys. It describes symmetric key cryptography, where the same key is used for encryption and decryption, and asymmetric key cryptography, which uses different public and private keys. It also covers traditional cipher techniques like substitution and transposition ciphers. The document concludes by listing some applications of cryptography like e-commerce, secure data, and access control.
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Cryptography is the science of securing messages through encryption and decryption techniques to ensure confidentiality, integrity, and authentication. There are two main categories of cryptography - symmetric key cryptography where the same key is used by the sender and receiver, and asymmetric key cryptography where different public and private keys are used. Common techniques include substitution ciphers which replace letters with other letters or symbols, and transposition ciphers which rearrange the positions of letters in a message. The keys and algorithms used aim to protect data from unauthorized parties.
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Cryptography is the science of keeping information secret. It allows for confidentiality, authentication, integrity, and nonrepudiation. There are two main types of encryption algorithms: symmetric which uses a single shared key, and asymmetric which uses a public/private key pair. Hashing algorithms are used to verify integrity rather than keep information secret. Common symmetric algorithms include AES and DES, while RSA and DSA are examples of asymmetric algorithms. Cryptanalysis involves attempting to break or bypass cryptography. Cryptography should be used anywhere secret communication or stored data is needed such as in SSL, VPNs, and encrypted file systems.
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This document provides an overview of cryptography. It begins by defining cryptography as the science of encrypting and decrypting written communications. It then discusses the history of cryptography dating back to ancient Egypt and the Spartans. The document outlines some common cryptosystem services like confidentiality, integrity, and authentication. It also discusses key concepts like keyspace, symmetric and asymmetric encryption algorithms like AES and RSA, and hybrid encryption approaches. The presentation concludes by thanking the audience and offering to answer any questions.
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This document provides an overview of cryptography. It begins with background information, defining cryptography as using mathematics to encrypt and decrypt data to enable secure transmission. The main purposes of cryptography are then outlined as authentication, privacy/confidentiality, integrity, and non-repudiation. The methodology section describes symmetric and asymmetric encryption methods. Symmetric encryption uses the same key for encryption and decryption while asymmetric uses mathematically related public/private key pairs. Specific symmetric algorithms like block and stream ciphers are then defined along with concepts like padding schemes. The document concludes with sections on key exchange and digital signatures, which enable practical uses of cryptography.
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The document discusses the basics of cryptography including its components, categories, and types of cryptographic algorithms. It covers symmetric-key cryptography which uses the same key for encryption and decryption. It also discusses traditional ciphers like substitution and transposition ciphers as well as modern ciphers. Asymmetric-key cryptography which uses public and private key pairs is also summarized. The document concludes with an overview of network security goals like confidentiality, integrity, authentication, and non-repudiation.
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Cryptography is used to protect information by encrypting messages into an unreadable cipher text format. Modern cryptography uses either secret key cryptography, which uses a single key for encryption and decryption, or public key cryptography, which uses two mathematically related keys with one key to encrypt and the other to decrypt. The purpose of cryptography and security is to defend against hackers, industrial espionage, and to secure e-commerce, bank accounts, intellectual property, and avoid liability.
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This document discusses cryptography and how it provides security. It defines basic cryptography terms like plain text, cipher text, encryption, and decryption. It explains how cryptography works to secure communications from both passive and active security threats. The document also categorizes different types of cryptography like symmetric and asymmetric key cryptography, and compares how each uses keys to encrypt and decrypt messages. Applications of cryptography are listed as well.
Cryptography ppt
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The document discusses research approaches in cryptography. It outlines objectives to analytically study existing cryptographic systems and algorithms, compare their time and space complexity, and simulate vulnerabilities to cryptanalytic attacks. Common network attacks like wiretapping and denial of service are described along with solutions like encryption, authentication, and integrity checking. The RSA and Caesar ciphers are explained along with their encryption/decryption steps. MATLAB was used to implement RSA and Caesar and compare their time complexity.
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The document discusses cryptography concepts including encryption, decryption, symmetric and asymmetric encryption techniques, cryptanalysis methods like brute force attacks, and the importance of secret keys. Symmetric encryption uses a shared secret key by both sender and receiver, while asymmetric encryption uses different public/private keys. Cryptanalysis aims to discover plaintext or keys by techniques like brute force trials or exploiting algorithm weaknesses. Longer cryptographic keys increase the difficulty of brute force attacks breaking the encryption.
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This document provides an overview of information security and cryptography. It discusses objectives of security like avoiding data threats. It also covers topics like password auditing, data security, authentication, encryption, decryption, public and private key cryptography, digital signatures, and the RSA algorithm. It demonstrates an example of encrypting a message using RSA and decrypting the cipher text. The conclusion emphasizes the importance of information security.
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This document provides an overview of cryptography. It begins with defining cryptography as the practice of hiding information and discusses its purposes, including authentication, privacy, integrity, and non-repudiation. It then describes the basic architecture and types of cryptography, including secret key cryptography, public key cryptography, and hash functions. The document outlines the process of cryptography and different algorithm types, including public/private key cryptography and hash functions. It concludes by discussing different types of attacks on cryptography and thanking the audience.
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This document provides an overview of cryptography. It begins with defining cryptography as the practice of hiding information and discusses its purposes, including authentication, privacy, integrity, and non-repudiation. It then describes the basic architecture and types of cryptography, including secret key cryptography, public key cryptography, and hash functions. The document outlines the process of cryptography and different algorithm types, including public/private key cryptography and hash functions. It concludes by discussing different types of attacks on cryptography and thanking the audience.
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This document discusses various organization structures including line, functional, line and staff, matrix, and committee structures. It provides details on the definition and key aspects of each structure such as specialists, functional managers, project managers, and committees. The advantages and disadvantages of each structure are also summarized such as simplicity and burden on line executives for line structure, and specialization benefits and lack of unity of command for functional structure.
Organizational design ppt by vaishnavi khandelwal
This document discusses organizational design and structure. It covers key topics such as the four dimensions of organizational design including manager goal orientation, time orientation, interpersonal orientation, and formality of structure. It also discusses different types of organizational differentiation including horizontal, vertical, and spatial. Additionally, it examines different structural configurations such as simple structure, machine bureaucracy, and adhocracy. Contextual factors that influence organizational design like size, environment, technology, and strategy are also summarized. Finally, it looks at forces reshaping organizations and symptoms of structural weakness.
Internet secutity ppt by vaishnavi khandelwal
1) The document discusses internet security and why it is important to protect personal information online from hackers. It outlines common security threats like phishing, pharming, and SQL injection that aim to steal sensitive data.
2) Hackers are classified as black hats, grey hats, or white hats based on their intentions and activities. The different phases of a hack are also explained.
3) To stay safe online, the document recommends using strong passwords, being wary of sharing personal details publicly, using antivirus software, keeping computers updated, and employing a firewall. Taking the right precautions can help people enjoy the internet safely.
Intel mmx technology ppt by vaishnavi khandelwal
Intel's MMX technology enhances processors with SIMD instructions to accelerate multimedia applications like video and graphics. It includes four new packed data types, an enhanced instruction set, and eight 64-bit wide MMX registers. MMX provides basic arithmetic, comparison, pack/unpack, logical, and shift operations that can each perform the same operation on multiple data points simultaneously. This improves performance of tasks like conditional selection for chroma keying compared to without MMX. Existing software remains compatible without modification while gaining accelerated performance for multimedia applications.
Attitude
The document discusses attitudes, which are generally positive or negative views of people, places, things, or events. Attitudes develop based on affect, behavior, and cognition. There are three components of attitudes: the cognitive component involving thoughts and beliefs, the affective component involving emotions, and the behavioral component involving tendencies. Attitudes serve functions like adjustment, ego defense, value expression, and knowledge. The document suggests that attitudes are shaped by environment, past experiences, beliefs, and conditioning. It advocates developing a positive attitude by shifting one's focus, being curious rather than judgmental, and having gratitude.
Machine translation ppt by shantanu arora
This document discusses machine translation and its techniques. It begins with an introduction to machine translation, defining it as using computer software to translate between natural languages. It then covers various machine translation techniques including example-based, dictionary-based, rule-based, hybrid, neural, statistical, interlingual, and transfer-based. It also discusses challenges in machine translation such as ambiguity, different word orders between languages, compound words, and missing names. It concludes by mentioning some applications of machine translation like Google Translator, Bing Translator, and SYSTRAN.
Theories of leadership and styles ppt by shantanu arora
This document summarizes various theories of leadership and styles. It discusses trait theory, which focuses on individual leader characteristics. It also describes the managerial grid model and its concern for people and production. Additionally, it covers behavioral theory and contingency theory, which states that leadership behavior depends on situational characteristics. The document outlines three major leadership styles - authoritarian, participative, and delegative - and their characteristics.
Various organisation structure ppt by vaishnavi khandelwal
This document discusses various organization structures, including line, functional, line and staff, matrix, and committee structures. It provides details on each structure type, such as describing a line structure as the oldest and simplest with decision making by the owner only. The document also outlines advantages and disadvantages of each structure type. For example, it notes that advantages of a functional structure include specialization benefits and flexibility, while disadvantages include a lack of unity of command and difficulty fixing responsibility.
Final presentation on chatbot
This document provides an overview of chatbots, including: definitions of chatbots, the history of chatbots beginning in the 1960s, problems with current chatbot scenarios, educational and system requirements for developing chatbots, how chatbots work, types of chatbots, principles of chatbot design, data flow diagrams and ER diagrams related to chatbots, chatbot architecture, advantages and disadvantages of chatbots compared to humans, examples of successful chatbots, applications and limitations of chatbots, and conclusions. It also includes an index of topics covered and references related to chatbot design.
Devops ppt by shantanu arora
Devops is a set of practices that combines software development and IT operations. It aims to shorten the systems development life cycle and provide continuous delivery with high software quality. Devops is beneficial for organizations as it helps deliver features and fixes faster, while also improving service reliability and performance.
Ethical hacking ppt by shantanu arora
Ethical hacking involves using the same tools and techniques as criminal hackers but in a legal and responsible way to test an organization's security. It is done by white hat hackers who work as independent security professionals and evaluate target systems without damaging them or stealing information. They identify bugs and weaknesses and report them back to system owners. Ethical hackers require strong programming, networking, and computer skills as well as expertise in operating systems, firewalls, routers, network protocols, and security project management. Their work helps organizations protect themselves from external attacks and close security holes.
Group dynamics ppt by shantanu arora
Group dynamics involves how people interact in groups and is influenced by personality, power, and behavior. It helps groups work effectively. There are advantages and disadvantages to both small and large groups. Tuckman's model of group development includes five stages: forming, storming, norming, performing, and adjourning. Group norms and cohesiveness impact group dynamics. Social loafing, where people put in less effort in a group, can be reduced through accountability, interdependence, and group identity.
Group cohensiveness ppt by shantanu arora
Group cohesiveness refers to the bonding of group members to one another and the degree to which members are motivated to stay in the group. It develops through communication, shared interests, and a sense of "we-ness". Dimensions of cohesiveness include group unity, attraction between members, and commitment to working together towards shared goals. Factors that increase cohesiveness are threats from outside the group, difficulty entering the group, time spent together, previous successes, and similarities between members. Benefits include higher morale and productivity, while disadvantages can be personality clashes and struggles for power. Cohesiveness is strengthened by smaller groups, agreement on goals, and interdependence, and weakened by larger groups and individual rewards.
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Various organisation structure ppt by vaishnavi khandelwal
Various organisation structure ppt by vaishnavi khandelwal
Theories of leadership and styles ppt by shantanu arora
Theories of leadership and styles ppt by shantanu arora
Various organisation structure ppt by vaishnavi khandelwal
Various organisation structure ppt by vaishnavi khandelwal
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Cryptography ppt by vaishnavi khandelwal
- 2. SECURITY SECURITY THREATS SECURITY GOALS WHAT IS CRYPTOGRAPHY BASIC TERMS ENCRYPTION & DECRYPTION CATEGORIES OF CYRPTOGRAPHY COMPARISON CONCLUSION
- 3. SECURITY? ??
- 6. • Cryptography science and is the art of transforming messages to make them secure and immune to attack.
- 7. PLAIN TEXT CIPHER TEXT CIPHER ENCRYPTION & DECRYPTION KEYS
- 10. • Also known as secret key. Sender & receiver uses same key & an encryption/decryption algorithm to encrypt/decrypt data. i.e. the key is shared.
- 13. A substitution technique is one in which the letters/number/symbols of plaintext are replaced by other letters/numbers/symbols. e.g. A D, T 2 5, 3 Z 6
- 14. In the transposition technique the positions of letters/numbers/symbols in plaintext is changed with one another. Plain text: MEET ME AFTER PARTY Cipher text: TEMEEMEFAPTRYRAT KEY USED: 421635 1 2 3 4 5 6 M E E T M E A F T E R P A R T Y 4 2 1 6 3 5 T E M E E M E F A P T R Y R A T
- 15. Also known as public key cryptography. Sender & receiver uses different keys for encryption & decryption namely PUBLIC & PRIVATE respectively.
- 18. SYMMETRIC KEY CRYPTOGRAPHY ASYMMETRIC KEY CRYPTOGRAPHY 1) The same algorithm with the same key is used for encryption and decryption. 2) The key must be kept secret. 3)It may be impossible or at least impractical to decipher a message if no other information is available. 1)One algorithm is used for encryption and decryption with a pair of keys, one for encryption and one for decryption. 2)One of the two keys must be kept secret. 3)It may be impossible or at least impractical to decipher a message if no other information is available.
- 19. Defense services Secure data manipulation E –commerce Business transactions Internet payment systems User identification systems Access control Data security
- 20. By using of encryption techniques a fair unit of confidentiality, authentication, integrity, access control and availability of data is maintained.