5,863 reputation
2836
bio website
location Netherlands
age 40
visits member for 3 years
seen 5 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.

Currently looking for a new position in the Netherlands.


Dec
9
revised CAST-256 (CAST6) versions or S-Boxes
added 121 characters in body
Dec
9
revised CAST-256 (CAST6) versions or S-Boxes
added 127 characters in body
Dec
9
revised CAST-256 (CAST6) versions or S-Boxes
added 133 characters in body
Dec
6
revised SHA1 Collisions - what about practical attacks?
added 36 characters in body
Dec
3
revised I don't care about replay attacks. What should I do with the nonce in nacl?
added 9 characters in body
Dec
2
revised Collision in Merkle–Damgård without a collision in compression function
edited body
Dec
2
revised Verifying DER encoded DSA/ECDSA signature with extra content?
added 101 characters in body
Dec
2
revised Verifying DER encoded DSA/ECDSA signature with extra content?
fleshed it out a bit
Dec
1
revised Rounds in cryptography
added 2 characters in body
Nov
29
revised RFC 6979 - Why not simply hash the message & the private key for deterministic ECDSA?
added 62 characters in body
Nov
27
revised How to establish if a string contains a message
formatting
Nov
27
revised Repeatedly using same key on different plaintexts
rewritten , same conclusion
Nov
26
revised Maximum length in bits of the product n=pq
deleted 1 character in body
Nov
26
revised RSA OAEP: prevention of partial decryption of ciphertexts
deleted 237 characters in body; edited title
Nov
26
revised Maximum length in bits of the product n=pq
added 1 character in body; edited tags
Nov
25
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