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Jan
24
reviewed Leave Open Fairness in cryptography
Jan
24
comment Fairness in cryptography
By fair, do you mean "cheat proof", where user A might transfer his last bit but not get the final bit in return from user B? Can you edit the question to clarify it?
Jan
24
reviewed Leave Open display an image encrypted with ECB
Jan
11
reviewed No Action Needed Is there a client-side program to cryptography a HTML page and decode if correct password is writen?
Jan
11
comment How many bits of entropy would I get from 300 coin tosses?
@user21767, "fair coin" refers to a coin that has an even chance of turning up heads or tails, one that shows no bias over multiple flips. It encompasses the entire process of flipping a coin, including rotations, speed, wind, gravity, whatever; and it is considered fair only if the outcome is statistically unpredictable.
Jan
11
reviewed Close Which block cipher mode does the experts use?
Jan
11
reviewed Close Entropy in relation to computer security
Jan
11
reviewed Close Is there a client-side program to cryptography a HTML page and decode if correct password is writen?
Jan
11
reviewed Close Luby-Rackoff on Feistel ciphers
Jan
2
reviewed No Action Needed Plaintext XOR'd with keylength-shifted plaintext
Jan
2
reviewed Close Preventing Quantum Attacks on Cryptography
Jan
2
reviewed Close How will Cryptography be changed by Quantum Computing?
Jan
2
reviewed Close can anyone give the java code to encrypt files using paillier
Dec
29
reviewed Close How are random numbers for RSA generated?
Dec
29
reviewed Close OTP from Sony BIOS password recover
Dec
29
reviewed Close Do Brute-Force Attacks and Cryptanalysis refute Kerckhoffs's principle?
Dec
29
comment I need to know number of encryption/decryption operations?
Oops, sorry, my previous comment should be rewritten as "Meet in the middle attacks take advantage of the small block size used by the primitives."
Oct
19
comment I need to know number of encryption/decryption operations?
2^224 is the brute force answer, but as @Nova posted, certain attacks are possible in certain situations. Those attacks reduce the amount of work needed to recover the key. Meet in the middle attacks take advantage of the small key size used by the primitives. But they require massive amounts of space. An attack requiring 2^112x64 bits of space will need 4.1E22 1TB hard drives to execute. As that's not exactly practical today, attackers still need to trade space for rounds of execution.
Oct
17
answered I need to know number of encryption/decryption operations?
Oct
17
reviewed Close How do you test randomness?