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 Yearling
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Aug
25
reviewed Close Email: Degrees of Security
Aug
24
reviewed Reviewed What is the difference between a random oracle and a probabilistic algorithm?
Aug
24
reviewed Reviewed Knowing pre-encryption data, can we find the private key CryptoWall used?
Aug
24
revised Timing Attack on RSA
edited tags
Aug
24
revised Knowing pre-encryption data, can we find the private key CryptoLocker used?
edited tags
Aug
24
revised Knowing pre-encryption data, can we find the private key CryptoWall used?
copyedits, add link for context, create [ransomware] tag
Aug
24
comment How can I handle the situation if key size is less than 64 bits in DES?
@poncho: Fair enough. Corrected.
Aug
24
revised How can I handle the situation if key size is less than 64 bits in DES?
added 123 characters in body
Aug
24
revised How can I handle the situation if key size is less than 64 bits in DES?
added 123 characters in body
Aug
24
reviewed Reviewed How can I handle the situation if key size is less than 64 bits in DES?
Aug
24
revised How can I handle the situation if key size is less than 64 bits in DES?
added 426 characters in body
Aug
24
revised How can I handle the situation if key size is less than 64 bits in DES?
copyedit
Aug
24
answered How can I handle the situation if key size is less than 64 bits in DES?
Aug
24
comment Encryption of 8 bit of block data
@SEJPM: That's a very good point. I originally meant to suggest using a MAC for integrity protection, but forgot that while writing the answer. I've corrected that omission now.
Aug
24
revised Encryption of 8 bit of block data
add note about malleability and MACs
Aug
24
answered Encryption of 8 bit of block data
Aug
24
revised Encryption of 8 bit of block data
add extra info from comments, misc. copyedits
Aug
24
comment Encryption of 8 bit of block data
In particular, if random access is needed, using a (conventional, e.g. 128-bit) block cipher in CTR mode as your stream cipher could be a good choice. But do note that CTR mode, like stream ciphers in general, may be insecure if the data can change.
Aug
22
awarded  Yearling
Aug
21
answered How does the birthday paradox apply to random keys?