Tagged Questions
2
votes
2answers
137 views
Which categories of cipher are semantically secure under a chosen-plaintext attack?
I am trying to get my head around the circumstances under which a cipher is (or is not) semantically secure under a chosen-plaintext attack.
I can't seem to find a good reference explaining this.
I ...
5
votes
2answers
300 views
Practical necessity of semantic security under chosen plain text attack (CPA) in CBC mode
I was not able to understand why we practically need a CPA security in Cipher Block Chaining. (which insist on having a random IV), let say if the encryption is not CPA secure i.e , the adversary can ...
6
votes
1answer
124 views
Message space in security definitions
What is the message space in the following example and how does a message space relate to a security definition?
I mean, what difference does it make to such a definition if your message space is ...
