User Global nomad - Cryptography Stack Exchange

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	108 reputation	bio	website		visits	member for	1 year, 5 months
17 badges		location	Santa Clara, CA		seen	May 16 at 10:57

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How do I store encrypted files on a web server and decrypt them locally?

aug 18 at 12:44 Eyal 175

2

5

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1

answer

110

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How to turn adversary against encryption of zeroes into adversary against random bits?

encryption provable-security

aug 7 at 16:41 Paŭlo Ebermann♦ 9,710

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16

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6

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890

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Is there a secure cryptosystem that can be performed mentally?

encryption passwords

aug 8 at 20:35 John Deters 1,000

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3

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2

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194

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Is there any recent cryptographic algorithm especially designed for low-level processors?

encryption

jul 20 at 11:59 fgrieu 9,844

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3

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428

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Encryption algorithm that produces dummy output on incorrect passwords

encryption host-proof format-preserving deniable-encryption

jul 22 at 18:51 dchest 487

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4

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3

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147

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Can I jettison MAC if I already have SHA1(M)?

encryption hash mac integrity

jul 29 at 22:10 D.W. 7,949

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3

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201

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Why is a MAC needed?

block-cipher mac

jul 23 at 17:19 Paŭlo Ebermann♦ 9,710

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2

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335

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Is bcrypt better than GnupPG's iterated+salted hashing method?

hash passwords pgp bcrypt

jul 16 at 23:42 Thomas Pornin 19.1k

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224

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What differentiates a password hash from a cryptographic hash besides speed?

passwords hash

jul 11 at 15:16 David Schwartz 2,637

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3

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3

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562

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Why is the IV passed in the clear when it can be easily encrypted?

encryption initialization-vector

nov 29 at 21:50 owlstead 640

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11

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1

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“SHA-256” vs “any 256 bits of SHA-512”, which is more secure?

hash sha256 sha-2

jul 10 at 11:34 fgrieu 9,844

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154

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RSA algorithm's license free or paid?

rsa

jul 9 at 16:40 fgrieu 9,844

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10

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2

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403

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Encryption scheme for social-network-like data sharing data via untrusted server?

encryption host-proof

jul 6 at 20:18 David Cary 868

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6

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1

answer

820

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why do we need Diffie Hellman?

diffie-hellman key-exchange

jul 14 at 12:05 CodesInChaos 5,954

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4

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187

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Asymmetric algorithm to generate compact unique messages that can be validated

hash

jun 27 at 13:59 CodesInChaos 5,954

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1

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142

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How are state wiretaps obtaining plaintext from encrypted transmissions?

encryption

jun 30 at 12:40 Hendrik Brummermann♦ 483

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4

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486

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How can I validate a hashed password if all I have is another hash?

hash passwords authentication

dec 2 at 6:01 AshRj 111

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6

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2

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997

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Impacts of not using RSA exponent of 65537

public-key rsa

jul 2 at 10:50 fgrieu 9,844

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45

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14

answers

3

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Time Capsule cryptography?

time-sensitive

dec 25 at 14:42 Leon 1

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2

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2

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What's the fundamental difference between Diffie-Hellman and RSA?

encryption public-key rsa diffie-hellman

oct 2 at 19:38 Jon Callas 855

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2

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104

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Byte location of plaintext vs ciphertext when using a block cipher or stream cipher

block-cipher

jun 23 at 5:56 Thomas 2,579

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13

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377

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Is this password migration strategy secure?

cryptanalysis protocol-design passwords

jun 22 '12 at 15:50 fgrieu 9,844

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13

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2

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525

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What do the magic numbers 0x5c and 0x36 in the opad/ipad calc in HMAC do?

hash hmac authenticated-encryption

jun 22 '12 at 9:01 fgrieu 9,844

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8

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3

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2

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What is the difference between known-plaintext attack and chosen-plaintext attack?

cryptanalysis known-plaintext-attack chosen-plaintext-attack

jun 21 '12 at 18:22 cryptopathe 547

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1

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181

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Regarding matsui's Paper on Linear Cryptanalysis of DES

cryptanalysis des

jun 20 '12 at 15:42 cryptopathe 547

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4

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3

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105

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Are there any differences between PIR, oblivious transfer and differential privacy?

oblivious-transfer

jun 18 '12 at 20:44 Paŭlo Ebermann♦ 9,710

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152

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Does Identity-Based Encryption actually solve any problem?

diffie-hellman key-exchange pairings

jun 18 '12 at 15:59 poncho 14.6k

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2

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227

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Is ECB mode secure if plaintexts guaranteed to be unique?

encryption block-cipher ecb

jun 19 '12 at 5:38 fgrieu 9,844

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2

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779

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What is the most practical fully homomorphic cryptosystem?

homomorphic-encryption

may 3 at 12:38 mikeazo♦ 7,585

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1

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374

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Why Addition Mod 32?

algorithm-design xor twofish

jun 17 '12 at 18:21 poncho 14.6k

Global nomad

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