# What are the main characteristics of the Diffie Hellman algorithm?

## What are the main characteristics of the Diffie Hellman algorithm?

The Diffie–Hellman (DH) Algorithm is a key-exchange protocol that enables two parties communicating over public channel to establish a mutual secret without it being transmitted over the Internet. DH enables the two to use a public key to encrypt and decrypt their conversation or data using symmetric cryptography.

## What type of algorithm was followed in Diffie Hellman algorithm?

Is Diffie Hellman a symmetric algorithm? Diffie Hellman uses a private-public key pair to establish a shared secret, typically a symmetric key. DH is not a symmetric algorithm – it is an asymmetric algorithm used to establish a shared secret for a symmetric key algorithm.

Where is Diffie Hellman algorithm used?

The Diffie-Hellman algorithm will be used to establish a secure communication channel. This channel is used by the systems to exchange a private key. This private key is then used to do symmetric encryption between the two systems. RSA: It is the Rivest Shamir Adelman algorithm.

### How is RSA different from Diffie Hellman?

The asymmetric key includes many cryptographic algorithms. Both Diffie- Hellman Key Exchange and RSA have advantages and disadvantages….Diffie- Hellman Key Exchange Vs. RSA.

Parameters RSA Diffie-Hellman (DH) Key Exchange
Key Strength RSA 1024 bits is less robust than Diffie-Hellman. Diffie-Hellman 1024 bits is much more robust.

### What are the Diffie-Hellman groups?

• Diffie-Hellman Group 1 (768-bit)
• Diffie-Hellman Group 2 (1024-bit)
• Diffie-Hellman Group 5 (1536-bit)
• Diffie-Hellman Group 14 (2048-bit)
• Diffie-Hellman Group 15 (3072-bit)

What is the major problem with Diffie-Hellman key exchange algorithm explain?

The most serious limitation of Diffie-Hellman in its basic or “pure” form is the lack of authentication. Communications using Diffie-Hellman all by itself are vulnerable to man in the middle attacks.

#### What is Diffie-Hellman moduli?

Diffie-Hellman—A public-key cryptography protocol that allows two parties to establish a shared secret over an unsecure communications channel. Diffie-Hellman is used within IKE to establish session keys. It supports 768-bit (the default), 1024-bit, 1536-bit, 2048-bit, 3072-bit, and 4096-bit DH groups.

#### What are the characteristic features of elliptic curve cryptography ECC )?

Elliptic curve cryptography (ECC) uses the mathematical properties of elliptic curves to produce public key cryptographic systems. Like all public-key cryptography, ECC is based on mathematical functions that are simple to compute in one direction, but very difficult to reverse.

What are the Diffie Hellman groups?

## Is RSA inspired by Diffie-Hellman?

RSA permits digital signatures, a key differentiator from the Diffie-Hellman approach. Although both the Diffie-Hellman Key Exchange and RSA are the most popular encryption algorithms, RSA tends to be more popular for securing information on the internet.

## What are Diffie-Hellman groups?

Diffie-Hellman (DH) groups determine the strength of the key used in the key exchange process. Within a group type (MODP or ECP), higher Diffie-Hellman group numbers are usually more secure.

What is the difference between IKEv1 and IKEv2?

–> IKEv1 requires symmetric authentication (both have to use the same method of authentication), whereas IKEv2 uses Asymmetric Authentication ( Means one side RSA, another side can be pre-shared-key). –> IKEv2 allows you to use separate keys for each direction which provides more security compared to IKEv1.

### What was the purpose of the Diffie and Hellman algorithm?

– The purpose of the algorithm is to enable two users to securely exchange a key that can then be used for subsequent symmetric encryption of messages. -The algorithm itself is limited to the exchange of secret values.

### Which is an example of a Diffie Hellman key exchange?

This key Agreement can be in the form of Diffie-Hellman. Secure Remote Password Protocol is a good example that is based on this technique. Forward Secrecy: Forward secrecy-based protocols can generate new key pairs for each new session, and they can automatically discard them when the session is finished.

What’s the difference between RSA and Diffie Hellman?

Both RSA and Diffie Hellman (DH) are public-key encryption protocols used for secure key exchange. They are independent protocols that do not rely on one another. What is ephemeral Diffie Hellman? Ephemeral Diffie-Hellman uses temporary, public keys. Each instance or run of the protocol uses a different public key.

#### Is the DH algorithm an asymmetric or symmetric algorithm?

DH is not a symmetric algorithm – it is an asymmetric algorithm used to establish a shared secret for a symmetric key algorithm. What is a non-authenticated key-agreement protocol?