1,183 reputation
311
bio website redtwitz.com
location Paraguay
age 30
visits member for 2 years, 10 months
seen 3 hours ago

Mathematician. Power user. Coding enthusiast.

flair


Mar
5
awarded  Disciplined
Feb
24
comment Difference between Rijndael 128 / 256 blocksize implementations? (and impact of block size in general)
@figlesquidge: Uppercase B means bytes, not bits.
Jan
5
comment Deterministically combine more than one source of entropy
I'm not sure I know what you mean. Are you talking about deriving an integer from a pseudo-randomly generated floating point number or about the uniform distribution of the exclusive OR?
Jan
5
answered Deterministically combine more than one source of entropy
Jan
5
comment Deterministically combine more than one source of entropy
The sum of r1 and r2 will have an Irwin–Hall distribution, which is not at all uniform.
Dec
30
comment Why xor is a linear operation but ordinary adding is not
γ1 and γ2 can be any scalar, i.e, any element of the field F. In the example of the 8-bit integers, the only scalars are 0 and 1, yes. But in general, F could be any field, e.g., the set of all rational, real or complex numbers.
Dec
30
revised Why xor is a linear operation but ordinary adding is not
added 7 characters in body
Dec
28
revised Why xor is a linear operation but ordinary adding is not
deleted 171 characters in body
Dec
28
comment Why xor is a linear operation but ordinary adding is not
Right, scalar multiplication isn't distributive over field addition.
Dec
28
answered Why xor is a linear operation but ordinary adding is not
Dec
27
reviewed Excellent Why is sharing the seed and using SecureRandom “deterministically” so bad?
Dec
27
comment Using HMAC to secure a “widget”
HTTPS encrypts the GET request as well, not just the headers.
Dec
25
awarded  Custodian
Dec
25
reviewed Satisfactory Hypothetical unknown cipher - security in obscurity?
Dec
23
answered Why do these Python XTEA implementations require different deltas?
Dec
22
suggested suggested edit on Brute Force on 3DES with Reduced Keyspace and Unknown IV
Dec
22
answered Brute Force on 3DES with Reduced Keyspace and Unknown IV
Dec
21
comment Brute Force on 3DES with Reduced Keyspace and Unknown IV
Do you anything about the second half of the key (e.g., it consists only of letters) or is it a pseudo-random string?
Dec
21
comment Brute Force on 3DES with Reduced Keyspace and Unknown IV
Do you know which mode of operation has been used? How long is the key?
Dec
17
comment Scrypt's maximum strength to increase entropy of lame passwords
@user4982: You can try to brute-force a password with pretty much every programmable electronic device with enough memory, but the estimated costs of the slides (and paper) use 2002 ASIC technology.