CryptographyUniversity of Maryland College Park This course is definitely one of the best that you shouldn’t miss out...

An attacker can try to manipulate the public key distribution process. In particular nothing prevents an attacker from...

Identification Schemes Identification schemes are extremely important as building block for digital signature scheme. An identification scheme is...

Digital signature is a mechanism that can be used to provide integrity in the public key setting, analogous...

A public-key encryption scheme is composed of three probabilistic polynomial time algorithms: Gen The key-generation algorithm that on...

A New Direction in Cryptography Recall that the private-key cryptography allows two users who share a secret to...

Problems like addition, multiplication, modular arithmetic, exponentiation can be solved in polynomial time, so they are seen as...

Number theory studies integers and operation on them. Basics of number theory have natural application, like addition, subtraction,...

Besides the secrecy of communication, we also need to be concerned with integrity, which ensures that a message...

Limitations of Perfect Secrecy Recall that the perfect secrecy has two limitations: The first limitation can be circumvented...

Limitations of the One-Time Pad The one-time pad encryption scheme achieves perfect secrecy, but nowadays it is not...

In dictionary, cryptography is defined as the art of writing or solving codes. Historically, cryptography focused exclusively on...

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