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| bio | website | ethanheilman.tumblr.com |
|---|---|---|
| location | Cambridge, MA | |
| age | 30 | |
| visits | member for | 1 year, 10 months |
| seen | Apr 22 at 21:43 | |
| stats | profile views | 32 |
Security Hobbyist
Github: Ethan Heilman
Twitter: Ethan Heilman
Play FlipIt:
http://ethanheilman.github.com/flipIt/playable_with_instructions.html
Blog entries:
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Apr 11 |
awarded | Popular Question |
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Mar 18 |
awarded | Announcer |
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Feb 20 |
comment |
Why programming languages don't provide simple encryption methods? I am asking for serious failures in security that results in physical or financial damage. Such examples would make the case for simple easy to use packaged encryption in much the same way that firms which did not salt their passwords and had massive password exposures helped the security community "raise the bar" on password hashing standards. |
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Jan 7 |
awarded | Nice Question |
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Oct 23 |
comment |
Because the algorithm is known, it is no longer a trade secret The NSA has several secret ciphers, called SUITE A (BATON being one of the most well known). SUITE A ciphers (not publicly revealed) are considered the most secure by the NSA (although a few type 1 ciphers are public). That is not to say the ciphers have not be subject to review, many many cryptographers work for the NSA and have attempted to break these ciphers. That being said, I'd still prefer AES256 to BATON if my life depended on it. en.wikipedia.org/wiki/BATON archives.neohapsis.com/archives/crypto/2000-q4/0028.html en.wikipedia.org/wiki/NSA_Suite_A_Cryptography |
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Oct 16 |
accepted | What is the general justification for the hardness of finding preimages for cryptographic hash functions? |
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Oct 14 |
awarded | Nice Question |
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Oct 12 |
comment |
Could the Enigma algorithm be classified as a Feistel network? @bob - Yep you are correct. I had always heard that the reflector was unique to enigma (since the germans patented it) and assumed the plugboard while necessary to security was a rather common feature on rotor machines at that time. Researching this further I realize I was wrong, reflectors were quite common (for example the M-325 had a reflector) but I can find no mention of plug boards prior to the enigma (although that doesn't mean there were none). quadibloc.com/crypto/ro020404.htm |
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Oct 4 |
answered | Besides key and ciphertext sizes what are other advantages of elliptic curve versions of various protocols? |
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Oct 2 |
comment |
Could the Enigma algorithm be classified as a Feistel network? Also FYI The trick that made enigma so powerful was not the rotators changing position (since that was common of rotor machines of that time period hence the term rotor), it was the reflector that reflected the character back through the rotors. see en.wikipedia.org/wiki/Enigma_machine#Reflector The reflector also introduced a weakness into enigma. Namely that a character could never be encoded by itself. |
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Sep 19 |
revised |
Could one construct a cipher that is secure for friendly parties to use but insecure for hostile parties? added 169 characters in body |
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Sep 10 |
revised |
Security of simple xor and s-box cipher? fixing minor typo |
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Sep 6 |
awarded | Necromancer |
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Jul 24 |
comment |
Is there a way to break this encryption? Using the hash of the file as a public IV is extremely dangerous since it allows an attacker to try plaintexts and detect if they match. XCE would need to add randomness to plaintext to avoid this, but why not just use a random IV instead. |
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Jul 24 |
comment |
Is there a way to break this encryption? @xce Under option 2 there is no way to decrypt the file since the decrypter doesn't have access to a hash of the file it can't generate the same random sequence and decrypt the file. |
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Jul 24 |
comment |
Designing a key expander out of ciphers Edited post to add I just found a weakness in this. |
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Jul 24 |
revised |
Designing a key expander out of ciphers found weakness |
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Jul 19 |
revised |
Is there difference between Algebraic Homomorphic Encryption and Fully Homomorphic Encryption Schemes? fixing typo in title |
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Jul 19 |
suggested | suggested edit on Is there difference between Algebraic Homomorphic Encryption and Fully Homomorphic Encryption Schemes? |
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Jul 12 |
awarded | Yearling |
