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awarded  cryptanalysis
Feb
2
comment Is AES in CBC mode secure if a known and/or fixed IV is used?
@juwiley I would suggest wikipedia's Mode of Operation article as a first start, it has many more links.
Jan
19
awarded  Nice Answer
Jan
17
comment Are there any advantages in using proprietary encryption?
I wouldn't call it "state of the art" to use an proprietary (i.e. not widely analyzed) algorithm. Maybe "cutting edge" is more correct (and even sounds cooler).
Jan
16
awarded  Favorite Question
Dec
22
comment AES - What is the advantage of a 256-bit key with a 128-bit block cipher?
Actually, for three elements there are only $6 = 3!$, not 9.
Nov
25
comment Public key crypto instead of hashing passwords in a database
public-key encryption is usually not deterministic, so you can't really use this to check if the password matches.
Nov
13
comment Private and public keys, how do they relate mathematically?
Also, please have a look at the questions linked at the side bar under "Related" ... I guess some of them might answer your question.
Nov
12
comment Why can't I reverse a hash to a possible input?
Basically, all currently known hash unbroken functions are just "nobody knows how to break them". I don't think any of them has a complete proof. (Some have partial proofs showing that they are "secure" (in some formal sense) if some component is "secure" (in the same or another formal sense)).
Nov
5
awarded  Good Answer
Oct
25
comment Should I use ECB or CBC encryption mode for my block cipher?
@Imray I guess when your data is smaller than one block, and will not repeat anyways (i.e. already includes a nonce), and you are really space/bandwidth-limited, ECB has some uses. Might have other ones I'm not aware of.
Oct
21
awarded  Nice Answer
Oct
12
awarded  Enlightened
Oct
12
awarded  Nice Answer
Oct
9
awarded  Nice Question
Oct
5
awarded  Nice Answer
Sep
22
awarded  Nice Question
Sep
17
awarded  Nice Answer
Sep
5
awarded  Nice Answer
Sep
1
comment How does the index of coincidence work in the Kasiki test?
No, it depends on the text being typical enough (i.e. having a typical distribution of letters for the language being analyzed), and long enough.