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Cryptography

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Answer score of 25 or more. This badge can be awarded multiple times.
Awarded 593 times.
How to check a file was encrypted (really & correctly)
Awarded Aug 7, 2019 at 7:20
Can error correction and detection be done without adding extra bits?
Awarded Aug 1, 2019 at 2:50
How many bits in the resultant hash will change, if the x bits are changed in its the original input?
Awarded Jul 30, 2019 at 8:30
ECDSA, EdDSA and ed25519 relationship / compatibility
Awarded Jul 30, 2019 at 8:20
Smallest Guaranteed hash collision cycle length
Awarded Jul 30, 2019 at 8:20
Can one generalize the Diffie-Hellman key exchange to three or more parties?
Awarded Jul 26, 2019 at 20:15
Can neural cryptanalysis be applied to AES?
Awarded Jul 26, 2019 at 13:50
RSA with probable primes
Awarded Jul 22, 2019 at 7:40
Purpose of outer key in HMAC
Awarded Jul 16, 2019 at 16:25
For a hashing function like MD5, how similar can two plaintext strings be and still generate the same hash?
Awarded Jul 15, 2019 at 3:20
In layman's terms, how does Shor's algorithm work?
Awarded Jul 8, 2019 at 18:25
Other than password hashes, are there other uses for non-reversible crypto
Awarded Jul 1, 2019 at 7:30
SHA-256 hash of null input?
Awarded Jun 25, 2019 at 13:40
Digital signature that is only verifiable by one specific person
Awarded Jun 15, 2019 at 10:25
Can I remove newlines in a public key?
Awarded Jun 13, 2019 at 12:55
ECDSA Compressed public key point back to uncompressed public key point
Awarded Jun 7, 2019 at 0:25
Why hashing twice?
Awarded Jun 5, 2019 at 19:45
Soft question: Examples where lack of mathematical rigour cause security breaches?
Awarded Jun 4, 2019 at 14:55
Random oracle model proofs and programmability
Awarded Jun 4, 2019 at 9:45
Possible ways to crack simple hand ciphers?
Awarded Jun 1, 2019 at 4:15
Is a hash a zero-knowledge proof?
Awarded May 30, 2019 at 8:20
What are the benefits of lattice based cryptography?
Awarded May 24, 2019 at 1:40
Can we assume that a hash function with high collision resistance also means a highly uniform distribution?
Awarded May 22, 2019 at 9:40
Could we break MD5 entirely in the future?
Awarded May 16, 2019 at 21:25
Why Curve25519 for encryption but Ed25519 for signatures?
Awarded May 14, 2019 at 3:05
What are the implications of the new alleged key recovery attack preprint on SIMON?
Awarded May 12, 2019 at 1:20
Does "Shattered" actually show SHA-1-signed certificates are "unsafe"?
Awarded May 11, 2019 at 1:00
What is so special about elliptic curves?
Awarded May 10, 2019 at 10:25
Why is padding used for RSA encryption given that it is not a block cipher?
Awarded May 2, 2019 at 17:30
Is there really no use for MD5 anymore?
Awarded Apr 27, 2019 at 13:20
Why does BitLocker not use RSA?
Awarded Apr 23, 2019 at 22:55
Taking advantage of one-time pad key reuse?
Awarded Apr 17, 2019 at 17:31
Why was the term "discrete" used in discrete logarithm?
Awarded Apr 17, 2019 at 16:30
What is the relation between Discrete Log, Computational Diffie-Hellman and Decisional Diffie-Hellman?
Awarded Apr 12, 2019 at 21:35
Why must IV/key-pairs not be reused in CTR mode?
Awarded Apr 10, 2019 at 4:55
Why does AES have exactly 10 rounds for a 128-bit key, 12 for 192 bits and 14 for a 256-bit key size?
Awarded Mar 22, 2019 at 14:05
How is the Swiss post e-voting system supposed to work, and how was it wrong?
Awarded Mar 14, 2019 at 13:15
Turning a cipher into a hashing function
Awarded Mar 12, 2019 at 12:30
Why is AES not a Feistel cipher?
Awarded Mar 11, 2019 at 1:00
Are there two known strings which have the same MD5 hash value?
Awarded Mar 7, 2019 at 16:45
Low Public Exponent Attack for RSA
Awarded Mar 6, 2019 at 16:25
How does ECDH arrive on a shared secret?
Awarded Feb 23, 2019 at 11:20
Is one-time pad encryption vulnerable when near identical data is sent many times with different OTP?
Awarded Feb 19, 2019 at 18:25
How to choose between AES-CCM and AES-GCM for storage volume encryption
Awarded Feb 13, 2019 at 14:20
Is one-time pad encryption vulnerable when near identical data is sent many times with different OTP?
Awarded Feb 10, 2019 at 1:15
HMAC vs ECDSA for JWT
Awarded Feb 4, 2019 at 22:00
Are there two known strings which have the same MD5 hash value?
Awarded Jan 17, 2019 at 9:40
Can someone explain the ECB Penguin?
Awarded Jan 10, 2019 at 7:00
If Kerckhoff's Principle holds, why do we need a cipher at all?
Awarded Dec 31, 2018 at 17:15
Looking at hash output – is Base64 encoding in any way better than HEX encoding?
Awarded Dec 28, 2018 at 3:45
Reason why “XOR” is a linear operation, but ordinary “addition” isn’t?
Awarded Dec 28, 2018 at 3:45
Information leakage from the ecryptfs filesystem
Awarded Dec 28, 2018 at 3:45
How can Cipher Block Chaining (CBC) in SSL be attacked?
Awarded Dec 28, 2018 at 3:45
Why exactly is Blowfish faster than AES?
Awarded Dec 28, 2018 at 3:45
Why programming languages don't provide simple encryption methods?
Awarded Dec 28, 2018 at 3:45
How does recovering the public key from an ECDSA signature work?
Awarded Dec 28, 2018 at 3:45
What tests can I do to ensure my random number generator is working correctly?
Awarded Dec 28, 2018 at 3:45
RSA with small exponents?
Awarded Dec 28, 2018 at 3:45
Why did Histiaeus tattoo his slave's head?
Awarded Dec 28, 2018 at 3:45
How is the MD2 hash function S-table constructed from Pi?
Awarded Dec 25, 2018 at 9:25
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