Enlightened - Badge - Cryptography Stack Exchange

Enlightened

First to answer and accepted with score of 10 or more. This badge can be awarded multiple times.

Awarded 1266 times.

Why is SHA256 used as a layer on top of Digital Signature

Awarded Nov 10 at 18:26

poncho

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How does one deal with a negative "d" in RSA?

Awarded Nov 9 at 17:09

CodesInChaos

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Best cryptographic algo with asymmetric cost: expensive to sign, cheap to validate

Awarded Oct 27 at 19:51

poncho

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Why are elliptic curves constructed using prime fields and not composite fields?

Awarded Oct 27 at 5:10

CurveEnthusiast

3,45915 silver badges21 bronze badges

Does Grover's algorithm really threaten symmetric security proofs?

Awarded Oct 18 at 19:56

Hhan

3983 silver badges7 bronze badges

Cryptography based on uncomputable problems?

Awarded Oct 16 at 20:17

Mikero

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How to use GCM mode and associated-data properly

Awarded Oct 15 at 4:45

Stephen Touset

11k1 gold badge38 silver badges53 bronze badges

How to verify the integrity of RSA encrypted messages?

Awarded Oct 8 at 12:57

otus

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is TLS compression used in modern browsers?

Awarded Oct 3 at 15:31

Steffen Ullrich

1,5389 silver badges11 bronze badges

Somewhat Homomorphic Encryption versus Fully Homomorphic Encryption?

Awarded Sep 27 at 5:51

Dragos

6467 silver badges14 bronze badges

Is the HMAC of a broken hash such as MD2, MD5, SHA1 etc, also broken?

Awarded Sep 19 at 2:20

kelalaka

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Could tropical cryptography become another candidate for post-quantum cryptography?

Awarded Aug 25 at 4:11

kodlu

21.2k2 gold badges24 silver badges50 bronze badges

Must root certificates be self signed?

Awarded Aug 8 at 16:41

fgrieu♦

138k12 gold badges302 silver badges579 bronze badges

Introduction to LLL algorithm applied to linear modular inequalities

Awarded Jul 25 at 9:31

Samuel Neves

12.4k42 silver badges52 bronze badges

FHE: What is the difference between multiplicative depth and multiplicative level?

Awarded Jul 20 at 18:33

kelalaka

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Should I use “modes of operation” for a single block of data?

Awarded Jul 15 at 13:16

Eugene Styer

1,6211 gold badge10 silver badges12 bronze badges

Does "SHA-256/192" use different initial values from SHA-256?

Awarded Jun 12 at 11:34

kelalaka

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What is "witness encryption"?

Awarded Jun 7 at 21:51

tylo

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Can a raw ECDH shared secret be used directly for encryption?

Awarded May 27 at 20:56

poncho

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Can we use fixed Beaver's multiplication triples many times?

Awarded May 26 at 17:09

Cryptonaut

1,0667 silver badges19 bronze badges

Find Elliptic Curve Parameters, a and b, Given Two Points on the Curve

Awarded May 18 at 17:49

kelalaka

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Why are there so many versions of the TEA block cipher?

Awarded May 17 at 9:58

forest♦

15.1k2 gold badges46 silver badges101 bronze badges

How long does a good AES encryption take?

Awarded May 16 at 23:20

Biv

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ZKP: Prove that >18 while hiding age

Awarded May 15 at 9:50

Ilmari Karonen

45.9k5 gold badges105 silver badges179 bronze badges

What is "spinal-tap grade" security?

Awarded May 7 at 17:21

Squeamish Ossifrage

47.9k3 gold badges115 silver badges221 bronze badges

Does the order of validations and MAC with clear text matter?

Awarded May 2 at 19:36

Maarten Bodewes♦

91.8k13 gold badges160 silver badges311 bronze badges

How to prove that a function is not pseudorandom?

Awarded Apr 26 at 22:42

fkraiem

8,0822 gold badges26 silver badges38 bronze badges

Generating a NIST P-256 private key

Awarded Apr 24 at 9:40

Squeamish Ossifrage

47.9k3 gold badges115 silver badges221 bronze badges

Do standalone Oblivious Transfer (OT) Protocols exist?

Awarded Apr 23 at 8:27

Yehuda Lindell

27.6k1 gold badge65 silver badges83 bronze badges

Why Ed25519 encodes y-coordinates rather than x-coordinates

Awarded Apr 16 at 5:51

bk2204

2,9715 silver badges12 bronze badges

What is the recommended minimum key length for ECDSA signature

Awarded Apr 15 at 10:51

Maarten Bodewes♦

91.8k13 gold badges160 silver badges311 bronze badges

Is it true that 7zip doesn't use any salt with its KDF?

Awarded Apr 13 at 17:46

otus

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What does it mean for an adversary to run in PPT?

Awarded Apr 13 at 13:20

fkraiem

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What can make an implementation of a large integer library unsafe for cryptography

Awarded Apr 9 at 11:30

fgrieu♦

138k12 gold badges302 silver badges579 bronze badges

How to reveal/prove some personal information later

Awarded Apr 7 at 19:21

poncho

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How did they factor RSA 240?

Awarded Apr 6 at 21:56

Sam Jaques

1,0956 silver badges9 bronze badges

How does constant-time comparison work?

Awarded Mar 23 at 3:56

fgrieu♦

138k12 gold badges302 silver badges579 bronze badges

Why is Threefish not widely used?

Awarded Mar 18 at 4:40

Maarten Bodewes♦

91.8k13 gold badges160 silver badges311 bronze badges

Is it insecure to sign the value 0 with ElGamal?

Awarded Mar 13 at 18:28

poncho

145k11 gold badges228 silver badges357 bronze badges

Entropy when iterating cryptographic hash functions

Awarded Mar 13 at 11:11

D.W.

36.2k12 gold badges100 silver badges185 bronze badges

MAC using a modified CBC mode of operation

Awarded Mar 11 at 20:21

fgrieu♦

138k12 gold badges302 silver badges579 bronze badges

Formula for the number of expected collisions

Awarded Mar 9 at 4:21

poncho

145k11 gold badges228 silver badges357 bronze badges

curve25519 weak points for contributory behaviour

Awarded Feb 20 at 16:04

Samuel Neves

12.4k42 silver badges52 bronze badges

Understanding Feldman's VSS with a simple example

Awarded Feb 16 at 9:32

D.W.

36.2k12 gold badges100 silver badges185 bronze badges

What is a trapdoor permutation?

Awarded Feb 15 at 1:16

D.W.

36.2k12 gold badges100 silver badges185 bronze badges

ECIES vs. RSA + AES

Awarded Feb 10 at 23:38

fgrieu♦

138k12 gold badges302 silver badges579 bronze badges

CKM_RSA_PKCS vs CKM_RSA_X_509 mechanisms in PKCS#11

Awarded Feb 10 at 14:33

Maarten Bodewes♦

91.8k13 gold badges160 silver badges311 bronze badges

Shor algorithm and schnorr signature in ed25519

Awarded Feb 10 at 0:25

Squeamish Ossifrage

47.9k3 gold badges115 silver badges221 bronze badges

What are the drawbacks of "lightweight crypto"?

Awarded Feb 4 at 5:16

Mark

11.6k17 silver badges36 bronze badges

Which MAC scheme is quantum resistant?

Awarded Jan 23 at 10:10

D.W.

36.2k12 gold badges100 silver badges185 bronze badges

Can a homomorphic encryption scheme be made CCA2 Secure?

Awarded Jan 19 at 17:47

DrLecter

12.5k3 gold badges42 silver badges59 bronze badges

Fast cipher without needing hardware support (like ChaCha20) for disk encryption

Awarded Jan 14 at 15:33

Taylor R Campbell

3762 silver badges6 bronze badges

Is choosing $1$ as a public exponent valid in RSA?

Awarded Jan 12 at 7:56

fgrieu♦

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Always set the IV to 0 randomized CBC

Awarded Jan 10 at 13:04

Daniel S

21.9k1 gold badge25 silver badges64 bronze badges

Quantum Computing Used to Break RSA by "fixing" Schnorr's Recent Factorization Claim?

Awarded Jan 6 at 15:10

Daniel S

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Must RSA exponent and modulus be odd

Awarded Dec 30, 2022 at 22:16

forest♦

15.1k2 gold badges46 silver badges101 bronze badges

Is there a 32 bit block cipher that is also a permutation over all 4bn elements?

Awarded Dec 26, 2022 at 2:55

forest♦

15.1k2 gold badges46 silver badges101 bronze badges

Coordinates in Elliptic Curves used in cryptography

Awarded Dec 17, 2022 at 19:33

fgrieu♦

138k12 gold badges302 silver badges579 bronze badges

What is the algorithm used to encrypt Linux passwords?

Awarded Dec 16, 2022 at 12:27

ilkkachu

8926 silver badges12 bronze badges

Entropy of a counter

Awarded Dec 14, 2022 at 15:46

poncho

145k11 gold badges228 silver badges357 bronze badges

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