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comment Building a pad for OTP on-the-fly with Diffie-Hellman
You could run the exchange once and put the result in some CSPRNG, and use that for your stream cipher. DH is expensive.
Nov
20
reviewed Reject suggested edit on What is the meaning of “trapdoor” in cryptography?
Nov
10
reviewed No Action Needed How do public key rings work in cryptographic applications?
Nov
10
reviewed Close Determining message given cipher-text and public key
Nov
9
comment How can I prove CPA secure by using a new scheme gen,enc,dec from GEN,ENC,DEC?
Is $enc()$ deterministic?
Nov
9
revised How can I prove CPA secure by using a new scheme gen,enc,dec from GEN,ENC,DEC?
Fixed formatting
Nov
9
reviewed Approve suggested edit on Need 32-bit mixing function that has perfect avalanche between octets
Nov
9
reviewed Approve suggested edit on How do public key rings work in cryptographic applications?
Nov
8
comment Proving that a function is not invert-able (one way function)
@GuutBoy Cheers for that, I get notation mixed up sometimes
Nov
5
comment Proving that a function is not invert-able (one way function)
I understand you omit the first bit of $x$ ($x_0$) and append the rest of it to the string of 0s. Is this correct, or are you simply concatenating 0s and $x$?
Nov
5
revised Proving that a function is not invert-able (one way function)
Fixr
Oct
31
comment Advantages of combined PRNGs
The original intention was to use the result as the key for a stream cipher but intention here is irrelevant as the question stands on its own merit - namely, if this is a valid way to "harden" a CSPRNG. Toggling between two RNGs as you propose would be disastrous if one gets compromised (but, cheekily, only half as disastrous if I were only using one) because it would produce the half-decoded fragment you warn against in the next paragraph.
Oct
31
reviewed Reject suggested edit on AES— Brute force attack versus Known plain text attack
Oct
12
reviewed Leave Open RSA given q, p and e?
Oct
12
comment RSA given q, p and e?
Regarding the (now three) decryption request close votes: Please read the question again or pick a better close reason.
Oct
12
reviewed Approve suggested edit on Non-linearity of a boolean function
Oct
5
reviewed Close Witness and Commitment in Commitment schemes
Oct
5
reviewed Approve suggested edit on How is XOR used for encryption?
Oct
2
comment Triple DES in Firefox - in practice
We don't flame. We downvote.
Oct
2
reviewed Leave Open RSA given q, p and e?