T*r
2 楼
http://www.rsasecurity.com/rsalabs/faq/3-2-6.html
【在 h**********r 的大作中提到】
: 能不能指点些资料查查, 或者任何idea, 多谢了!
【在 h**********r 的大作中提到】
: 能不能指点些资料查查, 或者任何idea, 多谢了!
h*r
3 楼
恩, get two paper in the reference list.
Thx.
【在 T********r 的大作中提到】
: http://www.rsasecurity.com/rsalabs/faq/3-2-6.html
Thx.
【在 T********r 的大作中提到】
: http://www.rsasecurity.com/rsalabs/faq/3-2-6.html
w*o
4 楼
1. It's a make-up scheme that defends exhaustive key search.
As key scheduling in Feistel structures incurs latency, 3DES
is very slow, normally can only get 1/3 speed of DES,
and 1/10 speed of AES.
2. Block size is only 64-bit, which is vulnerable to exhaustive
plaintext search when the input plaintext has low entropy.
For instance, English text has low entropy. Instead of
searching 2^64 random cases, you only need to search 2^26 (cannot
remember exact number) cases.
Othe
【在 h**********r 的大作中提到】
: 能不能指点些资料查查, 或者任何idea, 多谢了!
w*o
5 楼
3DES is not vulnerable to these academia attacks.
These RSA people don't know Shannon's pure cipher system,
where EDE equals to E (E: encryption, D:decryption).
So-called double encryption and double key problem are not
justifiable in theory, as Shannon's pure cipher theory implied,
but these RSA people (including Ron Rivest) don't read Shannon's
result, and invent a set of vulnerable schemes, then attack
the vulnerable schemes to attract attention.
This is really amazing.
【在 h**********r 的大作中提到】
: 恩, get two paper in the reference list.
: Thx.
h*r
6 楼
THX a lot!
【在 w*******o 的大作中提到】
:
: 3DES is not vulnerable to these academia attacks.
: These RSA people don't know Shannon's pure cipher system,
: where EDE equals to E (E: encryption, D:decryption).
: So-called double encryption and double key problem are not
: justifiable in theory, as Shannon's pure cipher theory implied,
: but these RSA people (including Ron Rivest) don't read Shannon's
: result, and invent a set of vulnerable schemes, then attack
: the vulnerable schemes to attract attention.
: This is really amazing.
【在 w*******o 的大作中提到】
:
: 3DES is not vulnerable to these academia attacks.
: These RSA people don't know Shannon's pure cipher system,
: where EDE equals to E (E: encryption, D:decryption).
: So-called double encryption and double key problem are not
: justifiable in theory, as Shannon's pure cipher theory implied,
: but these RSA people (including Ron Rivest) don't read Shannon's
: result, and invent a set of vulnerable schemes, then attack
: the vulnerable schemes to attract attention.
: This is really amazing.
h*r
7 楼
EDE == E? I remember I this is proven to be false in Stalling's
Cryptography and Network Security
【在 w*******o 的大作中提到】
:
: 3DES is not vulnerable to these academia attacks.
: These RSA people don't know Shannon's pure cipher system,
: where EDE equals to E (E: encryption, D:decryption).
: So-called double encryption and double key problem are not
: justifiable in theory, as Shannon's pure cipher theory implied,
: but these RSA people (including Ron Rivest) don't read Shannon's
: result, and invent a set of vulnerable schemes, then attack
: the vulnerable schemes to attract attention.
: This is really amazing.
Cryptography and Network Security
【在 w*******o 的大作中提到】
:
: 3DES is not vulnerable to these academia attacks.
: These RSA people don't know Shannon's pure cipher system,
: where EDE equals to E (E: encryption, D:decryption).
: So-called double encryption and double key problem are not
: justifiable in theory, as Shannon's pure cipher theory implied,
: but these RSA people (including Ron Rivest) don't read Shannon's
: result, and invent a set of vulnerable schemes, then attack
: the vulnerable schemes to attract attention.
: This is really amazing.
h*r
9 楼
Maybe I make myself misunderstood, I really mean EDE != E, but I have not
read the proof of this. Does Shannon provide any idea about this? I know
his paper is a milestone, I will go to read it for sure. :) thx.
【在 w*******o 的大作中提到】
:
: no, the term "equal" here is about the sample space.
: of course if "EDE=E", then why do the "DE" part?
: check Shannon's pure cipher for details.
read the proof of this. Does Shannon provide any idea about this? I know
his paper is a milestone, I will go to read it for sure. :) thx.
【在 w*******o 的大作中提到】
:
: no, the term "equal" here is about the sample space.
: of course if "EDE=E", then why do the "DE" part?
: check Shannon's pure cipher for details.
相关阅读
为什么ie浏览器不能用,google chrome却还可以使用呢?有没有好用的光盘加密软件?系统RESTORE 程序没了怎么办?今天大面积的“感染病毒“了笔记本数据恢复计算机变成绿色背景,但图标认可识别????求助喇叭没声了?请求帮助!Laptop加热会有什么后果?lost access to a remote server紧急求助,删除win7失败备份Excel 注册表被更改求助:也中Antivirus System Pro,试了大侠们说的那个Malwarebytes' Anti-Malware,不能运行啊?请问这段代码是干什么的?how to delete files permanently from laptop?What could I do?求助:XP下有rundll32.exe自动后台运行,占用50%CPU资Does my PC have virus ?救命啊,电脑这几天奇慢。 (转载)