fgrieu

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2,607 reputation

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	location	Paris, France
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visits	member for	9 months
	seen	13 hours ago
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I'm an engineer with experience in applied cryptography, in particular in Smart Card systems.

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65 Answers

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17	How big an RSA key is considered secure today?
12	Is it feasible to build an index of prime factors?
12	Is digest=HASH(HASH(a)+HASH(b)) equivalent to publishing two digests?
8	Does RSA work for any message M?
7	Brute forcing CRC-32

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2,607 Reputation

+50	Difficulty of breaking RSA for a given key size
+10	Is a random length-extension worth the effort?
+10	amateur cryptosystem -> a very long boolean expression -> attempt to reduce it
+10	Encrypting small values with RSA private key

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8 Questions

votes activity newest

7	Duration for attacking Two-Key Triple-DES Encryption using all RAM ever built?
7	Are safe primes $p=2^k \pm s$ with $s$ small less recommandable than others as a discrete log modulus?
6	Prooving knowledge of a preimage of a hash without disclosing it?
6	How much can we compress RSA public keys?
3	In RSA, rationale for prime $p$ with $p-1$ having prime factor $u$ with $u-1$ having large prime factor?

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68 Tags

51 hash × 15	20 implementation × 5
47 rsa × 15	18 md5 × 5
36 cryptanalysis × 14	17 aes × 5
29 random-number-generator × 11	17 factorization × 3
24 public-key × 5	16 prime-numbers × 5

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7 Accounts

	Cryptography	2,607 rep	314
	Stack Overflow	133 rep	5
	IT Security	133 rep	4
	Physics	108 rep	4
	Statistical Analysis	58 rep	6

17 Badges

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Nice Answer × 3	Organizer
Enthusiast	Critic
Enlightened	Commentator
Necromancer	Citizen Patrol

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215 Votes Cast

all time			by type			month
194	up		63	question		5
21	down		152	answer		5

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