Categories
安全 算法、协议

Recover RSA Private Key from N E D

By @sskaje
Link: https://sskaje.me/2018/11/recover-rsa-private-key-from-n-e-d/

N: Public Modulus
E: Public Exponent
D: Private Exponent

Recover RSA Private Key from N E D by @sskaje: https://sskaje.me/2018/11/recover-rsa-private-key-from-n-e-d/
Categories
算法、协议 逆向

[协议分析]某app

By @sskaje
Link: https://sskaje.me/2017/05/protocol-analysis-some-app/

android版被加固,所以直接拿了越狱的4s,lldb远程调试,还原协议。

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[协议分析]某app by @sskaje: https://sskaje.me/2017/05/protocol-analysis-some-app/
Categories
学习研究 笔记 算法、协议 逆向

Base Convert and Base Encode

By @sskaje
Link: https://sskaje.me/2014/01/base-convert-base-encode/

Base Convert

Base conversion is a very basic skill in programming.
I was taught converting between decimal(base-10) and binary(base-2), decimal(base-10) and octal(base-8), decimal(base-10) and hexadecimal(base-16), and of course among base 2-powered numbers(pow(2,n)).

The conversion is quite simple, division is the only arithmetic operation we need.
If we want to convert a base-m number to a base-n number by our hands, the common way is:
1 Convert base-m number A to base-10 number B;
2 Convert base-10 number B to base-n number C.
just because the base-10 is the most familiar base to humans.

Base Convert and Base Encode by @sskaje: https://sskaje.me/2014/01/base-convert-base-encode/
Categories
Apple iOS 学习研究 操作系统相关 算法、协议 逆向

Apple signed fake device attributes?

By @sskaje
Link: https://sskaje.me/2013/10/apple-signed-fake-device-attributes/

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Apple signed fake device attributes? by @sskaje: https://sskaje.me/2013/10/apple-signed-fake-device-attributes/