@startuml
file plaintext [
    Platte tekst

    <size:40><&envelope-open></size>
]
file ciphertext [
    Digitale handtekening

    <size:40><&copywriting></size>
]
file plaintext2 [
    Handtekening OK!

    <size:40><&check></size>
]
plaintext -ri-> ciphertext: <size:20><&key></size> Privésleutel (alleen Alice)
ciphertext -ri-> plaintext2: <size:20><&key></size> Publieke Sleutel (iedereen)
@enduml
