Step 1: KEY GENERATION This step is to generate a public key pair and a private key pair, by choosing two available primes. Main : Introduction of RSA Step 2: Encryption Step 1: Key Generation Step 3: Decryption

Select two Prime Numbers By entering two Random Numbers to calculate primes, P and Q, computer will generate N, E and D. E and N are the public key pair, while D and N are the private key pair. It is very important that you write down those numbers ( N,E and D ). You will need E and N for encryption, and D and N for decryption. Random Number 1 for First Prime Number P: ( write a number of 1~1000 )     Random Number 2 for Second Prime Number Q: ( write a number of 1~1000 )

Step 2: ENCRYPTION This step is to encrypt a Message using RSA algorithm. Main : Introduction of RSA Step 2: Encryption Step 1: Key Generation Step 3: Decryption

Write Number to Encrypt Write Number( M, M:message ) to Encrypt. You must Know E and N - Public Key Pair. "M" is only Number & M < N ( N is modulo ). Write a message to Ciper : ( Caution! : Only Number & M < N )     Exponent Key: ( Public Key Pair of E )     N value: ( Public Key Pair of N )

Step 3: DECRYPTION This step is to decrypt the encrypted message, using RSA algorithm. Main : Introduction of RSA Step 2: Encryption Step 1: Key Generation Step 3: Decryption

Write Encrypted Message to Decrypt Write Encrypted Message to decrypt by step 2. You must Know D and N - private key pair. Encrypted Messge : ( We received Encrypted message from Step2 )     Decryption key D: ( Private Key Pair of D )     N value: ( Private Key Pair of N )

Caution! Wait! RSA Algorithm is coplicated, so many mathematical calculation. Please, wait for a little while or more during Decryption as your computer system.