Thomas Pornin

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13,319 reputation

11948

bio	website	bolet.org/~pornin
	location	Quebec City, Canada
	age	36
visits	member for	10 months
	seen	2 days ago
stats	profile views	178

Cryptographer, programmer in several languages (C, Java, several assemblies, Pascal, Forth...). I also have a life.

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191 Answers

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24	How much would it cost in U.S. dollars to brute force a 256 bit key in a year?
21	What is the “Random Oracle Model” and why is it controversial?
20	What are the practical difference between 256-bit, 192-bit, and 128-bit AES encryption?
19	How were the DES S-box values determined?
18	What are the benefits of the two permutation tables in DES?

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13,319 Reputation

+10	RSA with small exponents?
+10	How much would it cost in U.S. dollars to brute force a 256 bit key in a year?
+10	What are the practical difference between 256-bit, 192-bit, and 128-bit AES encryption?
+10	Why does PBKDF2 xor the iterations of the hash function together?

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2 Questions

votes activity newest

32	Should we MAC-then-encrypt or encrypt-then-MAC?
7	How robust is discrete logarithm in GF(2^n) ?

114 Tags

207 encryption × 35	113 cryptanalysis × 18
188 hash × 29	90 aes × 16
165 public-key × 27	72 protocol-design × 10
131 rsa × 22	69 des × 8
117 block-cipher × 17	60 number-theory × 11

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12 Accounts

	IT Security	32,728 rep	459130
	Stack Overflow	20,413 rep	21355
	Cryptography♦	13,319 rep	11948
	Computer Science	251 rep	3
	Super User	211 rep	13

68 Badges

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Enlightened × 14	Good Question
Nice Answer × 30	Necromancer
hash	Civic Duty
Popular Question	Fanatic
encryption	Enthusiast

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398 Votes Cast

all time			by type
396	up		256	question
2	down		142	answer

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