5,581 reputation
1930
bio website
location
age
visits member for 2 years, 11 months
seen Jan 17 at 23:30

Jan
12
awarded  Custodian
Jan
12
reviewed Leave Closed Is there a client-side program to cryptography a HTML page and decode if correct password is writen?
Jan
12
awarded  Custodian
Jan
12
reviewed No Action Needed P = NP and current cryptographic systems
Jan
12
reviewed Close Why are there no MACs inspired by block cipher modes other than CBC and CFB?
Jan
12
reviewed Close How many bits of entropy would I get from 300 coin tosses?
Jan
12
reviewed Close Luby-Rackoff on Feistel ciphers
Jan
12
reviewed Leave Open private keys for multiple devices
Jan
11
reviewed Close Camellia or AES - which should I use?
Jan
7
comment Do I have to transfer the private key to digitally sign a remote document?
If anything is preventing you from transmitting the unsigned pdf back to the client for signing, I am afraid the problem is with your requirements. You will either need some basic pdf parser client side, or you will have to let the server sign the document using a certificate that is not issued for the client. You can't have it both ways.
Jan
5
awarded  Taxonomist
Dec
30
comment Do I have to transfer the private key to digitally sign a remote document?
Transfer the preliminary pdf to the client, let the client sign it and upload it back to the server. Alternatively, let the server sign it with a key corresponding to a certificate that belongs to the service rather than the user.
Dec
29
revised Do I have to transfer the private key to digitally sign a remote document?
deleted 1 character in body
Dec
29
answered Do I have to transfer the private key to digitally sign a remote document?
Dec
29
comment Do I have to transfer the private key to digitally sign a remote document?
What exactly does "DSC" mean in this context?
Dec
26
comment Prime Numbers in Discrete Log
You have chosen the tag "dsa", but there is no mention of digital signatures in your question. Do you need primes for Diffie-Hellman or for a signature scheme?
Dec
26
answered Prime Numbers in Discrete Log
Dec
26
reviewed Close Which Block cipher mode should I use?
Dec
26
reviewed Close What is Initialization vector (IV)
Dec
26
comment Which Block cipher mode should I use?
Define "secure".