Exam CAS-003 topic 1 question 146 discussion

feels like it's talking about block chain?

The answer could be A or D. Lets see: D. Based on https://resources.infosecinstitute.com/topic/alternative-distributed-ledger-architectures/ Meet the following requeriments reduced transaction time, security, message integrity, cryptographic security but asynchronous. A. Based on moz-extension://382a19ac-8980-4165-98a9-b34625cd4d3d/https://www.jite.org/documents/Vol9/JITEv9IIPp061-077Murray804.pdf and this https://www.ibm.com/cloud/learn/database-security You can meet the following requeriments reduced transaction time, security, message integrity, cryptographic security and asynchronous. So, i vote A.

Why not: C. A publicly verified hashing algorithm that allows revalidation of message integrity at a future date ? Option A seems to only apply to transaction logs. The question is more concerned with message integrity than transaction logs. Increasing messages integrity is specifically mentioned in the question. Option C is the only option that addresses that.

I'm going with A here as well. an internal key infrastructure is a short and pretty complete solution to the problem the question asks.

An agreement with an entropy-as-a-service provider to increase the amount of randomness in generated keys. - EaaS is typically used with IoT A publicly verified hashing algorithm that allows revalidation of message integrity at a future date. - does not address traffic time An open distributed transaction ledger that requires proof of work to append entries - does not address traffic time or cryptography An internal key infrastructure that allows users to digitally sign transaction logs - meets all the stated objectives

I think is A. Many other dumps have A as the answer, it does not mean that A is the answer and another dump has entropy as the answer. I did some research and I could not find the right answer.