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Security and Crypto Technologist


Jun
27
comment What is Attribute Based Encryption?
informally, intuitively, i believe a technique achieved by PKE could also be achieved by SKE. ABE may be lot cleanly achieved in PKE but should be possible in SKE too, imagine a master secret key split into key shares per attribute or something but i did not think through how ABE can be realized using SKE
Jun
27
reviewed Approve Public Key Cryptography: Diffie-Hellman Key Exchange
Jun
26
comment What is Attribute Based Encryption?
am curious if there is any work done in symmetric ABE schemes
Jun
23
reviewed Approve Modulo settings for successful encryption?
Jun
23
comment how to truncate a PRF on n bits to PRF on t bits where t < n?
@D.W even i was not clear by Boneh's comment that there are better ways to do it . so thought of checking with the community
Jun
21
reviewed Approve Cryptography: Oblivious Transfer with at most one transfer?
Jun
21
reviewed Approve how to truncate a PRF on n bits to PRF on t bits where t < n?
Jun
20
accepted Should tweak be unique per message?
Jun
19
reviewed Approve Protocol composition
Jun
19
revised Protocol composition
added 288 characters in body
Jun
19
answered Protocol composition
Jun
19
reviewed Approve Modes of Operations Exercise
Jun
18
comment Open source implementations of Symmetric Searchable Encryption and Order Preserving Encryption
This question appears to be off-topic because it is about reference implementations and software recommendations
Jun
18
comment Length-preserving all-or-nothing transform
@mikeazo. i guess so
Jun
18
comment Length-preserving all-or-nothing transform
@mikeazo AONT internally uses block ciphers , in itself they are not encryption schemes. So the question is little vague. AONT could be a mode but not block-cipher in itself .
Jun
18
comment Length-preserving all-or-nothing transform
how is this different from crypto.stackexchange.com/questions/6098/…
Jun
15
comment Symmetric encryption mode where ciphertext size is plain text size
This question is duplicate of crypto.stackexchange.com/questions/6098/…
Jun
10
revised Pseudo random permutation for arbitrary size domains
added reference
Jun
9
comment How do I construct variable length input (VIL) in a block cipher mode?
Are you looking for standard ways for production ? or not yet standard research level techniques also fine ?
Jun
8
revised Is there a length-preserving encryption scheme?
added 719 characters in body