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Jan
19
awarded  Notable Question
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awarded  Popular Question
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29
awarded  Popular Question
Sep
24
awarded  Autobiographer
Jul
2
awarded  Curious
Feb
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30
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31
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Jul
28
awarded  Nice Question
Apr
22
asked Using the same secret key for encryption and authentication in a Encrypt-then-MAC scheme
Feb
7
comment Is there a problem with constructing a CSPRNG using MD5 or SHA1?
+1 Great paper. The CTR_DRBG CSPRNG design looks great. Do you know of a paper that talks about keystream generators for DRBG?
Feb
7
accepted Is there a problem with constructing a CSPRNG using MD5 or SHA1?
Feb
4
revised Is there a problem with constructing a CSPRNG using MD5 or SHA1?
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Feb
4
comment Is there a problem with constructing a CSPRNG using MD5 or SHA1?
@CodesInChaos In this case, using a CRC-like function for mixing, and md5 or sha1 for the output stream.
Feb
4
asked Is there a problem with constructing a CSPRNG using MD5 or SHA1?
Dec
21
comment Efficient Symmetric Mutual Entity Authentication Protocol
@Martin Lundberg if you have a "server" then you can have a "time server". I think that not having time in your current protocol is a mistake.
Dec
21
revised Efficient Symmetric Mutual Entity Authentication Protocol
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Dec
21
revised Efficient Symmetric Mutual Entity Authentication Protocol
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Dec
21
comment Efficient Symmetric Mutual Entity Authentication Protocol
@Martin Lundberg Kerberos is probably more efficient than your protocol because its doesn't use RSA. I would avoid asymmetric cryptography as much as possible. Not having an accurate clock has other problems. How do you void keys at noon when their time is up? This is why kerberos tokens have a timestamp!