Asymmetric Algorithms

Question 1

RSA

• Algorithm type
• size
• strength
• replaced?

Answer 1

• Algorithm type = key transport
• size = 512
• strength = strong
• replaced? no

Question 2

Diffie-Hellman

• Algorithm type
• size
• strength
• replaced?

Answer 2

• Algorithm type = Key exchange
• size = n.a.
• strength = moderate
• replaced by El Gamal

Question 3

El Gamal

• Algorithm type
• size
• strength
• replaced?

Answer 3

• Algorithm type = Key exchange
• size = n.a.
• strength = very strong
• replaced? no

Question 4

ECC

• Algorithm type
• size
• strength
• replaced?

Answer 4

• Algorithm type = Elliptic Cure
• size = variable (smaller due to EC, example: 160-bit EC key = 1025 RSA)
• strength = very strong
• replaced? no