update README of crypto-vault-cli app

cmd/crypto-vault-cli/README.md

@@ -11,62 +11,46 @@
 
 ## Getting Started
 
+**NOTE**: Keys will be generated internally during the encryption or signature generation operations.
+
 ### Encryption/Decryption
 
 **AES example**
 
 ```sh
+uuid=$(cat /proc/sys/kernel/random/uuid)
 # Encryption
-go run crypto-vault-cli.go encrypt-aes --input data/input.txt --output data/output.enc --keySize 16 --keyDir data/
+go run crypto-vault-cli.go encrypt-aes --input data/input.txt --output data/${uuid}-output.enc --keySize 16 --keyDir data/
 # Decryption
-go run crypto-vault-cli.go decrypt-aes --input data/output.enc --output data/decrypted.txt --keyDir data/
+go run crypto-vault-cli.go decrypt-aes --input data/${uuid}-output.enc --output data/${uuid}-decrypted.txt --symmetricKey <your generated symmetric key from previous encryption operation>
 ```
 
-**RSA Example considering external key generation**
+**RSA Example**
 
 ```sh
-cd data
-openssl genpkey -algorithm RSA -out private_key.pem -pkeyopt rsa_keygen_bits:2048
-openssl rsa -pubout -in private_key.pem -out public_key.pem
-cd -
+uuid=$(cat /proc/sys/kernel/random/uuid)
 
 # Encryption
-go run crypto-vault-cli.go encrypt-rsa --input data/input.txt --output data/encryptedII.txt --publicKey data/public_key.pem
+go run crypto-vault-cli.go encrypt-rsa --input data/input.txt --output data/${uuid}-encrypted.txt --keyDir data/
 
 # Decryption
-go run crypto-vault-cli.go decrypt-rsa --input data/encryptedII.txt --output data/decryptedII.txt --privateKey data/private_key.pem
-```
-
-**RSA Example considering internal key generation**
-
-```sh
-# Encryption
-go run crypto-vault-cli.go encrypt-rsa --input data/input.txt --output data/encryptedII.txt
-
-# Decryption
-go run crypto-vault-cli.go decrypt-rsa --input data/encryptedII.txt --output data/decryptedII.txt --privateKey data/private_key.pem
-```
-
-**RSA with PKCS#11 Example considering external key generation** 
-
-```sh
-TBD
+go run crypto-vault-cli.go decrypt-rsa --input data/${uuid}-encrypted.txt --output data/${uuid}-decrypted.txt --privateKey <your generated private key from previous encryption operation>
 ```
 
-**RSA with PKCS#11 Example considering internal key generation** 
+**RSA with PKCS#11 Example** 
 
 ```sh
 TBD
 ```
 
 ### Hashing / Verifying signatures
 
-**ECDSA Example considering internal key generation**
+**ECDSA Example**
 
 ```sh
 # Sign a file with a newly generated ECC key pair (internally generated)
 go run crypto-vault-cli.go sign-ecc --input data/input.txt --keyDir data
 
 # Verify the signature using the generated public key
-go run crypto-vault-cli.go verify-ecc --input data/input.txt --publicKey data/public_key.pem --signature data/signature.sig
+go run crypto-vault-cli.go verify-ecc --input data/input.txt --publicKey <your generated public key from previous signing operation> --signature <your generated signature file from previous signing operation>
 ```