[cryptography] Why using asymmetric crypto like symmetric crypto isn't secure

2012-11-03 Thread Peter Gutmann
In the past there have been a few proposals to use asymmetric cryptosystems, typically RSA, like symmetric ones by keeping the public key secret, the idea behind this being that if the public key isn't known then there isn't anything for an attacker to factor or otherwise attack. Turns out that

Re: [cryptography] Why using asymmetric crypto like symmetric crypto isn't secure

2012-11-03 Thread Ralph Holz
Hi, In the past there have been a few proposals to use asymmetric cryptosystems, typically RSA, like symmetric ones by keeping the public key secret, the idea behind this being that if the public key isn't known then there isn't anything for an attacker to factor or otherwise attack. Turns

Re: [cryptography] Why using asymmetric crypto like symmetric crypto isn't secure

2012-11-03 Thread Jon Callas
In the past there have been a few proposals to use asymmetric cryptosystems, typically RSA, like symmetric ones by keeping the public key secret, the idea behind this being that if the public key isn't known then there isn't anything for an attacker to factor or otherwise attack. Turns out

Re: [cryptography] Application Layer Encryption Protocols Tuned for Cellular?

2012-11-03 Thread ianG
On 1/11/12 10:55 AM, Peter Gutmann wrote: Jeffrey Walton noloa...@gmail.com writes: Is anyone aware of of application layer encryption protocols with session management tuned for use on cellular networks? [...] From that description your problem isn't at the encryption-protocol level at

Re: [cryptography] Application Layer Encryption Protocols Tuned for Cellular?

2012-11-03 Thread Jeffrey Walton
On Sat, Nov 3, 2012 at 6:25 PM, ianG i...@iang.org wrote: On 1/11/12 10:55 AM, Peter Gutmann wrote: Jeffrey Walton noloa...@gmail.com writes: Is anyone aware of of application layer encryption protocols with session management tuned for use on cellular networks? [...] From that

Re: [cryptography] Why using asymmetric crypto like symmetric crypto isn't secure

2012-11-03 Thread Peter Gutmann
Jon Callas j...@callas.org writes: Which immediately prompts the question of what if it's long or secret? [1] This attack doesn't work on that. The asymmetric-as-symmetric was proposed about a decade ago as a means of protecting against new factorisation attacks, and was deployed as a commercial