5,503 reputation
2734
bio website
location Netherlands
age 40
visits member for 3 years
seen 2 hours ago

Security professional with many years of experience with the practical application of cryptographic algorithms and protocols. I'm helping with the design of protocols and API's within international standardization bodies. Lead developer of a common criteria certified product. Over 30 years of general experience with computers.

On crypto I mainly answer less mathematically inclined questions, leaving security proofs to the theoretical cryptographers and analysts.


1d
revised How to establish if a string contains a message
formatting
1d
revised Repeatedly using same key on different plaintexts
rewritten , same conclusion
1d
revised Maximum length in bits of the product n=pq
deleted 1 character in body
1d
revised RSA OAEP: prevention of partial decryption of ciphertexts
deleted 237 characters in body; edited title
2d
revised Maximum length in bits of the product n=pq
added 1 character in body; edited tags
2d
revised CoAP authentication using DTLS
edited title
Nov
21
revised Hash collision using the leading 40-bits of SHA-1
added 92 characters in body; edited title
Nov
21
revised Encryption of big files in Java with AES/GCM
deleted 97 characters in body
Nov
20
revised Availability of a simple limited PRNG algorithm
edited title
Nov
19
revised Encryption of big files in Java with AES/GCM
added 75 characters in body
Nov
19
revised Encryption of big files in Java with AES/GCM
added 75 characters in body
Nov
19
revised AES - Encrypting multiple blocks of files
added 191 characters in body
Nov
18
revised Is the output of AES-CBC + MAC the same size as the input?
added 25 characters in body
Nov
18
revised Is the output of AES-CBC + MAC the same size as the input?
added 176 characters in body
Nov
17
revised what does rsaSha512Sign do?
added 505 characters in body
Nov
16
revised OpenSSL RSA same plaintext but different ciphertext
deleted 22 characters in body; edited title
Nov
14
revised How to perform frequency analysis of a substitution cipher using a Base64 alphabet
edited title
Nov
14
revised How can CBC-MAC be secure when message length is fixed?
formatting of math
Nov
13
revised What is the use of segments in Cipher Feedback Mode (CFB)
removed speculation
Nov
12
revised What is the use of segments in Cipher Feedback Mode (CFB)
added 23 characters in body