• RSS
  • Twitter
  • FaceBook

Security Forums

Log in

FAQ | Search | Usergroups | Profile | Register | RSS | Posting Guidelines | Recent Posts

multiple strings -> 1 password

Users browsing this topic:0 Security Fans, 0 Stealth Security Fans
Registered Security Fans: None
Post new topic   Reply to topic   Printer-friendly version    Networking/Security Forums Index -> Cryptographic Theory and Cryptanalysis - Internal and Transmission Security

View previous topic :: View next topic  
Author Message
Lem0nHead
Just Arrived
Just Arrived


Joined: 31 Oct 2008
Posts: 0


Offline

PostPosted: Tue Jul 14, 2009 11:10 pm    Post subject: multiple strings -> 1 password Reply with quote

hello
I have a system with one password (I'll call that "abc123") that will be controlled by a system with multiple passwords (in fact, it's a two-factor authentication, so it's a fixed password + unique rotating token)

so basically I need a way to convert multiple passwords into "abc123"

I was thinking about encrypting "abc123" with every possible password
and then when a user input one password, it decripts every encripted passwords until it finds a match (based on a hash possibly)

any better ideas?
Back to top
View user's profile Send private message
capi
SF Senior Mod
SF Senior Mod


Joined: 21 Sep 2003
Posts: 16777097
Location: Portugal

Offline

PostPosted: Wed Jul 15, 2009 12:48 am    Post subject: Reply with quote

That is basically what is done in asymmetric encryption schemes such as OpenPGP: you encrypt the body of the message with a given symmetric key, then you encrypt the key itself with all the public keys.
Back to top
View user's profile Send private message
Display posts from previous:   

Post new topic   Reply to topic   Printer-friendly version    Networking/Security Forums Index -> Cryptographic Theory and Cryptanalysis - Internal and Transmission Security All times are GMT + 2 Hours
Page 1 of 1


 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Community Area

Log in | Register