Message Authentication and Hash Functions

Aug 17, 2024

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Learn about message authentication, encryption, MACs, and hash functions in computer security. Understand security requirements for confidentiality, authentication, and integrity. Explore the importance of MACs and hash functions.

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Message Authentication and Hash Functions

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Message Authentication and Hash Functions

Message Authentication and Hash Functions Authentication Requirements Authentication Functions Message Authentication Codes Hash Functions Security of Hash Functions and MACs Authentication Requirements Kind of attacks (threats) in the context of communications across a network Disclosure

2.52k views • 27 slides

Chapter 3 (C) – Message Authentication and Hash Functions

Chapter 3 (C) – Message Authentication and Hash Functions. Message Authentication. message authentication is concerned with: protecting the integrity of a message validating identity of originator non-repudiation of origin (dispute resolution) then three alternative functions used:

493 views • 17 slides

Message Authentication

Message Authentication. MAC and Hash. Message Authentication. Verify that messages come from the alleged source, unaltered Authentication requirements Authentication functions. Authentication Requirements. Masquerade Content modification

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Chapter 11: Message Authentication and Hash Functions

2. Message Authentication. message authentication is concerned with: protecting the integrity of a message validating identity of originator non-repudiation of origin (dispute resolution) three alternative functions used:message encryptionmessage authentication code (MAC)hash function. 3. Broader Set of Attacks.

564 views • 18 slides

Lecture 04 Message Authentication and Hash Functions

ITEC4614 Network Security and Implementation. 2. Outline. Authentication RequirementsAuthentication FunctionsHash and MAC Algorithms. ITEC4614 Network Security and Implementation. 3. What is Authentication?. A procedure to verify that received messages come from the alleged sourced and have not b

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Hash Functions and Message Authentication Codes

Hash Functions and Message Authentication Codes. Cryptography 1 September 12, 2013. Sebastiaan de Hoogh, TU/e. Announcements. Until this morning 50 students handed in 43 pieces of homeworks . (only 7 pairs) BUT: Homeworks should be handed in by pairs !!!

763 views • 51 slides

Chapter 11 – Message Authentication and Hash Functions

Dr. Lo’ai Tawalbeh New York Institute of Technology (NYIT) Jordan’s Campus . Chapter 11 – Message Authentication and Hash Functions. INCS 741: CRYPTOGRAPHY. Message Authentication. message authentication is concerned with: protecting the integrity of a message

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Cryptographic Hash Functions Message Authentication Digital Signatures

Cryptographic Hash Functions Message Authentication Digital Signatures. Abstract. We will discuss Cryptographic hash functions Message authentication codes HMAC and CBC-MAC Digital signatures. Encryption/Decryption. Provides message confidentiality .

545 views • 32 slides

Message Authentication Methods, Functions, and Implementations

Message Authentication Methods, Functions, and Implementations. Çetin Kaya Koç. Cryptographic Hash Functions. A cryptographic hash function provides message integrity and authentication

573 views • 44 slides

Message Authentication and Hash Functions

Message Authentication and Hash Functions. Authentication Requirements Authentication Functions Message Authentication Codes Hash Functions Security of Hash Functions and MACs. Authentication Requirements. Kind of attacks (threats) in the context of communications across a network

630 views • 27 slides

Lecture 04 Message Authentication and Hash Functions

Lecture 04 Message Authentication and Hash Functions. Asst.Prof.Supakorn Kungpisdan, Ph.D. supakorn@mut.ac.th. Outline. Authentication Requirements Authentication Functions Hash and MAC Algorithms. What is Authentication?.

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Hash /MD5 background; Message Authentication

Hash /MD5 background; Message Authentication. Hash Function. Any length message X. Y = H(X). Fixed size digest Y e.g. 128 bits for MD5. Cannot be inverted, as not unique X = x bits Y = y bits Assuming ideal mapping, Y is the result for 2 x-y possible X messages Example:

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MESSAGE AUTHENTICATION and HASH FUNCTIONS - Chapter 11

• Masquerade – message insertion, fraud, ACK • Content Modification • Sequence Modification – insertion, deletion, re-ordering • Timing Modification – delay, replay. MESSAGE AUTHENTICATION and HASH FUNCTIONS - Chapter 11.

790 views • 26 slides

Chapter 11 Message Authentication and Hash Functions

Chapter 11 Message Authentication and Hash Functions. Message Authentication. message authentication is concerned with: protecting the integrity of a message validating identity of originator non-repudiation of origin (dispute resolution) then three alternative functions used:

419 views • 25 slides

Key Management, Message Authentication, Hash Function &

Key Management, Message Authentication, Hash Function &. Key Management. In cryptography, key management includes all of the provisions made in a cryptosystem design, in cryptographic protocols in that design, in user procedures, and so on, which are related to generation,

901 views • 72 slides

Chapter 11 – Message Authentication and Hash Functions

Dr. Lo’ai Tawalbeh New York Institute of Technology (NYIT) Jordan’s Campus. Chapter 11 – Message Authentication and Hash Functions. INCS 741: CRYPTOGRAPHY. Message Authentication. message authentication is concerned with: protecting the integrity of a message

270 views • 23 slides

Message Authentication and Hash Functions

INCS 741: Cryptography. Message Authentication and Hash Functions. Dr. Monther Aldwairi New York Institute of Technology- Amman Campus 12/19/2010. Authentication Requirements. disclosure traffic analysis masquerade content modification sequence modification timing modification

262 views • 20 slides

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Message Authentication and Hash Functions

Message Authentication and Hash Functions

Presentation Transcript

Message Authentication and Hash Functions

Chapter 3 (C) – Message Authentication and Hash Functions

Message Authentication

Chapter 11: Message Authentication and Hash Functions

Lecture 04 Message Authentication and Hash Functions

Hash Functions and Message Authentication Codes

Chapter 11 – Message Authentication and Hash Functions

Cryptographic Hash Functions Message Authentication Digital Signatures

Message Authentication Methods, Functions, and Implementations

Message Authentication and Hash Functions

Lecture 04 Message Authentication and Hash Functions

Hash /MD5 background; Message Authentication

MESSAGE AUTHENTICATION and HASH FUNCTIONS - Chapter 11

Chapter 11 Message Authentication and Hash Functions

Key Management, Message Authentication, Hash Function &amp;

Chapter 11 – Message Authentication and Hash Functions

Message Authentication and Hash Functions

Key Management, Message Authentication, Hash Function &