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If the attacker knows for sure that the (character space size) ^ (password length) is greater than 2 ^ (AES key length), then, yes, it's a better idea for the attacker to brute-force the AES key. Given such an assumption of the attacker's knowledge, it's a mathematical fact that the search size for the AES key will be smaller. Such an assumption of attacker ...


2

I'm gonna try to answer you separately: Access Control Matrix Q: "Could you say that in this matrix, the right r of S1 over O1 is leaked to S2 (because S2 can use S1 to access O1)?" A: No. If you consider the execution right to behave like a take right, then yes, S1's reading rights over O1 have leaked to S2, because originally S2 had no rights over O1. ...


0

ISAKMP isn't a protocol as much as a framework for key exchanges (I know it has protocol in the name). Implementations of the framework include the Internet Key Exchange (IKE) and Kerberized Internet Negotiation of Keys (KINK). If you read the ISAKMP RFC (RFC2408) it has a nice diagram for where ISAKMP sits in the network stack. RFC2408 Section 2.2 ...


1

According to this and Wikipedia, the OSI Session Layer is responsible for setting up any kind of conversation/dialogue. As ISAKMP runs on top of UDP (port 500) and it sets up a secure and authenticated channel for communication, i would say that it is part of OSI Session Layer.



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