ixzzz/crypto_lab

Crypto_Lab

Lab01

Code DES and AES with library cryptopp Task 1: Coding DES, AES using cryptopp library Required: +) Plaintext:

- Input from screen;

- Support Vietnamse (using setmod, UTF-16)

+) Mode of operations:

• Select mode from screen (using switch case)
• Support modes: ECB, CBC, OFB, CFB, CTR, XTS, CCM, GCM. +) Secret key and Initialization Vector (IV) select from screen (using switch case)

Case 1: Secret key and IV are randomly chosen for each run time using random generator using CryptoPP::AutoSeededRandomPool;

Case 2: Input Secret Key and IV from screen

Case 3: Input Secret Key and IV from file

+) OS platform

• Your code can compile on both Windows and Linux; +) Performance

• Report your hardware resources

• Report computation performance for all operations on both Windows and Linux

Performance

Lab02

Code DES and DES with out library Required: +) Plaintext:

- Input from screen;

- Support Vietnamese (using _setmode, UTF-16)

+) Mode of operations

 Using CBC mode

+) Secret key and Initialization Vector (IV)

 Input Secret Key and IV from screen

Lab03

Code RSA Cipher (Encryption/Decryption) using CryptoPP

Required:

+) Separation Encryption function and Decryption function (using switch case)

+) Plaintext:

- Support Vietnamese (UTF-16)

- Input from screen or from file (using switch case)

+) Cyphertext:

- Input from screen or from file (using switch case)

+) Secret key/public key

- The keys load from files (for both two functions)

- The public key: >= 3072 bits

+) OS platforms

• Your code can compile on both Windows and Linux

+) Performance

• Report your hardware resources

• Report computation performance for all operations on both Windows and Linux

Performance

Lab04

Code ECC-based Digital signature with CryptoPP

Required:

+) Algorithm: ECDSA

+) Separation the signing function and the verify function (using switch case)

+) signing function; verify function

- May adopt from library or direct compute from formulas. Deploy directly from formulas will get 10/100 bonus points. 

+) Message to sign:

- Input from file

- Support Vietnamese (using UTF-16)

+) ECC curve: should select from standard curves

+) Secret key/public key

- The keys load from files (for both two functions)

- The public key: >= 256 bits

+) OS platforms

• Your code can compile on both Windows and Linux

+) Performance

• Report your hardware resources

• Report computation performance for all operations on both Windows and Linux

Performance

Lab05

Required:

+) Separation all hash functions using switch case:

SHA224, SHA256, SHA384, SHA512, SHA3-224, SHA3-256, SHA3-384, SHA3-512, SHAKE128,SHAKE256

+) Plaintext:

- Support Vietnamese (UTF-16)

- Input from screen or from file (using switch case)

+) Digest:

- may choose digest output length d for SHAKE128,SHAKE256 from screen;

- digest should be encoded as hex string;

+) OS platforms

• Your code can compile on both Windows and Linux;

+) Performance

Perfomance

• Report your hardware resources

• Report computation performance for all operations on both Windows and Linux

Lab06

Report

Required:

6.1 MD5 collision attacks

+) Two collision messages have the same prefix string

• Generate yourself prefix string

• Compute the two output files that have the same MD5 digest (using hashclash tool)

+) Two different C++ programs but have the same MD5;

• Code yourself two short C++ programs

• Compiler your codes code1, code2

• Run hashclash to generate two program with the same MD5 digest

Note: It takes long time to generate the output.

6.2 Length extension attacks on MAC using SHA256 in form: SHA256(k||m), k is secret key

• This one for bonus 10/100 points (does not require all students)

+) Coding self programs that can

• Automatic compute the padded part for any input (k||m);

• Compute the digest using length extension attacks with any extend string;