'Sender knowing public key' presentation slideshows

Public Key Requirements

Public Key Requirements. computationally easy to create key pairs computationally easy for sender knowing public key to encrypt messages computationally easy for receiver knowing private key to decrypt ciphertext computationally infeasible for opponent to determine private key from public key

726 views • 72 slides

Cryptographic Tools

Cryptographic Tools. cryptographic algorithms important element in security services review various types of elements symmetric encryption public-key (asymmetric) encryption digital signatures and key management secure hash functions example is use to encrypt stored data.

322 views • 30 slides

Computer Security: Principles and Practice

607 views • 25 slides

Computer Security: Principles and Practice

327 views • 25 slides

Lecture 4 Cryptographic Tools ( cont )

Lecture 4 Cryptographic Tools ( cont ). modified from slides of Lawrie Brown. Message Authentication. protects against active attacks. verifies received message is authentic. contents have not been altered from authentic source timely and in correct sequence.

552 views • 21 slides