concept Public_Key
  purpose provide a publicly verifiable cryptographic identifier for secure communication and verification.

  dependencies
    Private_Key

  state
    user_handle: String
    public_key: String

  actions
    generatePublicKey(private_key: String)
      pre true
      // Additional logic to generate a public key from the provided private key
      set public_key to generatedPublicKey(private_key)

    retrievePublicKey()
      pre true
      // Additional logic to retrieve the user's public key
      set public_key to storedPublicKey()

    storePublicKey()
      pre true
      // Additional logic to store the user's public key securely

  operational principle
    after generatePublicKey(private_key), a public key is generated from the provided private key
    after retrievePublicKey(), the user's public key is retrieved
    after storePublicKey(), the user's public key is securely stored