David Schwartz

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2,667 reputation
413
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location Murphys, CA
age 43
visits member for 1 year, 10 months
seen Jun 14 at 9:37
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I am OpenCoin's Chief Cryptographer and one of the architects of the Ripple payment system.

I live in California's Gold Country, east of Sacramento.

Bitcoin: 1Gonhezk1ScHaFqUSYH9VQThaDS4PJSq1o


56 Answers

newest activity votes
2
How can a key pair be derived from an arbitrary hash?
apr 27 at 8:22
1
Key Exchange and anonymity issue
mar 19 at 12:23
3
Why do we assume un-security of communication channel on every cryptography system
feb 21 at 4:14
2
Is signing a hash instead of the full data considered secure?
feb 13 at 5:12
0
What encryption is this?
jan 20 at 19:10
3
What does a “cycle” mean in cryptography benchmarks?
jan 15 at 13:57
1
A proof-of-work random number generation system for Pokémon
jan 15 at 2:34
1
Is the One Time Pad (OTP) considered a cryptographic hash function?
jan 15 at 2:24
6
finding collision for truncated SHA1 hash output
nov 6 at 15:00
2
Storage of Private Keys
aug 27 at 5:25
2
What is the effect of the different AES key lengths?
aug 23 at 16:11
1
Design question for a service that signs messages on behalf of a user
aug 9 at 23:54
7
Cryptographic GUID?
aug 9 at 23:51
1
Approach towards anonymous e-voting
aug 8 at 3:14
1
Why does ROT13 provide no cryptographic security?
jul 29 at 12:15
3
Is it possible to ensure security with zero pre-shared information?
jul 16 '12 at 8:33
3
What differentiates a password hash from a cryptographic hash besides speed?
jul 11 '12 at 6:08
1
Why does it matter for a signature scheme to be without random oracles?
jun 29 '12 at 20:26
3
How can I validate a hashed password if all I have is another hash?
jun 27 '12 at 20:44
1
In the SHA hash algorithm, why is the message always padded?
jun 1 '12 at 15:40
1
How can encryption involve randomness?
may 24 '12 at 1:13
0
Encrypting documents through a proxy key
may 23 '12 at 5:48
1
Advantages of each encryption mode
apr 26 '12 at 8:31
4
How can one sign with NTRU?
apr 18 '12 at 21:34
2
My custom handshake
apr 7 '12 at 13:13
1
Which encodings have |encoding key| >> |decoding key|?
mar 25 '12 at 23:25
2
Does a public key absolutely need to be used to initiate an encrypted session?
mar 8 '12 at 13:15
0
Why do we need asymmetric algorithms for key exchange?
feb 7 '12 at 2:31
6
Two mutually untrusted parties want to exchange data: how to ensure each one gets the data it needs?
jan 12 '12 at 5:29
2
Two mutually untrusted parties want to exchange data: how to ensure each one gets the data it needs?
jan 12 '12 at 2:07
1 2