Do we have to know the Diffie-Helman key exchange for a level comp sci aqa paper 2?

I have seen this on Issac Computing's website but I have not seen it elsewhere. Will we have to know this key exchange?

It is when a sender and receiver choose a modulus and a base and then in private choose a secret number which is their private key. They then compute with the modulus and base to create a public key that they share.
More information can be found here:
https://isaaccomputerscience.org/concepts/net_sec_encryption?examBoard=aqa&stage=a_level&topic=encryption

and I am just wondering if we need to learn this rather than the simple understanding of a symmetric key encryption the sender and receiver share the same key?

Reply 1

hotpud

18

AQA? No. OCR, no idea. Google the specification and check.

Reply 2

nooooo3

OP

1

Original post by hotpud

AQA? No. OCR, no idea. Google the specification and check.

Oh, I was checking for AQA. So there is none?

Reply 3

hotpud

18

Original post by nooooo3

Oh, I was checking for AQA. So there is none?

Don't think so
https://www.aqa.org.uk/subjects/computer-science-and-it/as-and-a-level/computer-science-7516-7517/subject-content-a-level/fundamentals-of-communication-and-networking

Reply 4

wzrdium

10

Original post by nooooo3

I have seen this on Issac Computing's website but I have not seen it elsewhere. Will we have to know this key exchange?

It is when a sender and receiver choose a modulus and a base and then in private choose a secret number which is their private key. They then compute with the modulus and base to create a public key that they share.
More information can be found here:
https://isaaccomputerscience.org/concepts/net_sec_encryption?examBoard=aqa&stage=a_level&topic=encryption

and I am just wondering if we need to learn this rather than the simple understanding of a symmetric key encryption the sender and receiver share the same key?

Nope, just need to know all there is on the specification. For encryption related topics in chapter 9, you only need to know about (a)symmetric encryption and digital signatures/message digests.

Do we have to know the Diffie-Helman key exchange for a level comp sci aqa paper 2?

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