12,262 reputation
32559
bio website paul-ebermann.tumblr.com
location Berlin, Germany
age
visits member for 2 years, 9 months
seen 2 hours ago

Don't fear to edit my posts: even if I have more reputation than you, I do make mistakes.

I'm now also a Moderator Pro Tempore (= until the first elections) at Cryptography Stack Exchange: feel free to come around and ask some cryptography questions.


My personal name is spoken as /ˈpawlo/ (IPA), in English this would be written similar to Powlo, I think (i.e. the vowels are ow and o), with an accent on the before-last syllable (which is the first in this case). It's the Esperanto form of my given name.

The photo shows my shadow, taken at night. My camera sometimes seems to forget all the other frequencies and only stores the green ones.

My current main private programming project is the game of fencing, an online abstract turn based strategy game. Implemented as a Java applet, using git as a version control system.


Some more links:


Oct
17
revised Is there a hash function with 2048bit output?
better title, some rewording
Oct
17
comment How can I encrypt + authenticate short strings into similar short ciphertexts?
You need something like format-preserving encryption, probably together with an authentication tag.
Oct
17
comment uniquely identify a symmetric key
Could you make your use case a bit clearer? Is it something like the PSK (pre-shared key) cipher suites for TLS, which have an identity hint?
Oct
16
revised An Elliptic curve cryptography implementation which can be terminated
Z_p => Z_n (I hope it was meant this way)
Oct
16
comment An Elliptic curve cryptography implementation which can be terminated
Just a note: Signing your posts is not necessary (there is your userCard with name and avatar below any post), and a bit frowned upon in the Stack Exchange network. (About deleting own posts, we found out (just after I deleted your answer) that this is only possible for registered users (i.e. users with an OpenID linked to their account).
Oct
16
revised How to practically find solutions to a discrete logarithm?
edited tags
Oct
16
revised Is there a secure cryptosystem that can be performed mentally?
edited tags
Oct
16
revised Which algorithms are used to factorize large integers?
adding wikipedia links, some formatting
Oct
16
revised How to practically find solutions to a discrete logarithm?
tags, inlining links, formatting
Oct
16
revised Changing algorithms during encryption
edited tags
Oct
16
revised In RSA, do I calculate d from e or e from d?
formatting, add "use second method" from comment
Oct
16
revised In RSA, do I calculate d from e or e from d?
formatting, add "... exponent".
Oct
16
revised In RSA, do I calculate d from e or e from d?
formatting, tags
Oct
16
revised How can I use Weierstrass curve operations with a=-3 for implementing operations for a=0?
formatting, title
Oct
16
revised What is the use of REAL random number generators in cryptography?
add some clarification
Oct
16
revised How does one calculate a primitive root for Diffie-Hellman?
link, remove algorithm tag
Oct
16
revised What is the use of REAL random number generators in cryptography?
edited tags
Oct
16
revised Is there an algorithm or hardware that can sign/verify natural time?
tags, formatting, grammar, title
Oct
16
revised Can I select a large random prime using this procedure?
edited tags
Oct
16
revised What algorithm does PGP use to encrypt email?
edited tags