I learn from a minithesis to understand RC5. As we can see at the formula, the round 0 must be using A=A+S[0], because the loop is starting at r(round) 1.

I tried addition and OR(bitwise) to get the answer DA679BFB but keep missing, Here is my result of calculating.

A = A + S[0]

  = 4B726970 + BF0A8B1D

  = 10A7CF48D


A = A OR S[0]

  = 4B726970 OR BF0A8B1D

  = FF7AEB7D

The S Data is the result of 3rd phase key expanding on RC5. I really need help because I have been stuck here for 2 days and thank you in advance.

I learn from a minithesis to understand RC5. As we can see at the formula, the round 0 must be using A=A+S[0], because the loop is starting at r(round) 1.

I tried addition and OR(bitwise) to get the answer DA679BFB but keep missing, Here is my result of calculating.

A = A + S[0]

  = 4B726970 + BF0A8B1D

  = 10A7CF48D


A = A OR S[0]

  = 4B726970 OR BF0A8B1D

  = FF7AEB7D

The S Data is the result of 3rd phase key expanding on RC5. I really need help because I have been stuck here for 2 days and thank you in advance.

Plaintext : 4B726970 746F2053 74656761 6E6F
key       : 4B726970 746F6772 616669 
w(blocksize) = 32, r(round) = 12, b(key lenght) = 16

I learn from a minithesis to understand Rc5. As we can see at the formula, the round 0 must be using A=A+S[0], because the loop is starting at r(round) 1.

I tried addition and OR(bitwise) to get the answer DA679BFB but keep missing, Here is my result of calculating.

A = A + S[0]

  = 4B726970 + BF0A8B1D

  = 10A7CF48D


A = A OR S[0]

  = 4B726970 OR BF0A8B1D

  = FF7AEB7D

The S Data is the result of 3rd phase key expanding on Rc5. I really need help because I have been stuck here for 2 days and thank you before

I learn from a minithesis to understand RC5. As we can see at the formula, the round 0 must be using A=A+S[0], because the loop is starting at r(round) 1.

I tried addition and OR(bitwise) to get the answer DA679BFB but keep missing, Here is my result of calculating.

A = A + S[0]

  = 4B726970 + BF0A8B1D

  = 10A7CF48D


A = A OR S[0]

  = 4B726970 OR BF0A8B1D

  = FF7AEB7D

The S Data is the result of 3rd phase key expanding on RC5. I really need help because I have been stuck here for 2 days and thank you in advance.