## What is Rabin cryptosystem explain in detail?

Rabin Cryptosystem is an public-key cryptosystem invented by Michael Rabin. It uses asymmetric key encryption for communicating between two parties and encrypting the message. It has the disadvantage also, that each output of the Rabin function can be generated by any of four possible inputs.

**What security services can be implemented using Rabin cryptosystem?**

Encryption Algorithm

- Key generation.
- Encryption.
- Decryption.
- Example.
- Signing.
- Verifying a signature.
- Effectiveness.
- Efficiency.

### Is Rabin faster than RSA?

In terms of computational performance, Rabin encryption is extremely fast (as long as encryption does not require computing a Jacobi symbol) while decryption, using the Chinese remainder theorem, is roughly the same speed as RSA decryption.

**Why the Rabin cryptosystem is probabilistic?**

Encryption algorithm E is a probabilistic algorithm which takes a message p E P and the public key e, to produce a ciphertext d E D as a function of d = Ee1 (p). Rabin cryptosystem is non-deterministic asymmetric key algorithm. By using p1 and p2 we can decrypt the message and get the original message.

## What do you mean by cryptosystem?

In cryptography, a cryptosystem is a suite of cryptographic algorithms needed to implement a particular security service, such as confidentiality (encryption). Typically, a cryptosystem consists of three algorithms: one for key generation, one for encryption, and one for decryption.

**Which cryptographic system uses C1 e1r mod p and c2 e2r XP mod p at the encryption side?**

Elgamal cryptographic system

3. Which Cryptographic system uses C1 = (e1r) mod p and C1 = (e2r x P) mod p at the encryption side? Explanation: The Elgamal cryptographic system uses the above formulae to compute the CT.

### How do you generate a private and public key in RSA algorithm?

Generation of RSA Key Pair

- Generate the RSA modulus (n) Select two large primes, p and q.
- Find Derived Number (e) Number e must be greater than 1 and less than (p − 1)(q − 1).
- Form the public key. The pair of numbers (n, e) form the RSA public key and is made public.
- Generate the private key.

**Which cryptographic system uses C1 e1r mod p and C1 e2r XP mod p at the encryption side?**

## What is Chinese remainder theorem in cryptography?

The Chinese remainder theorem asserts that if the ni are pairwise coprime, and if a1., ak are integers such that 0 ≤ ai < ni for every i, then there is one and only one integer x, such that 0 ≤ x < N and the remainder of the Euclidean division of x by ni is ai for every i.

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