@startuml actor Bob #red ' The only difference between actor 'and participant is the drawing participant Alice participant "I have a really\nlong name" as L #99FF99 /' You can also declare: participant L as "I have a really\nlong name" #99FF99 '/ ' This is required to grant access to all icons. !include <material/common> ' This imports the actual door icon. !include <material/door> MA_DOOR(Purple, 1, setup_public_key, rectangle, "Public key"){} Alice->Bob: Authentication Request Bob->Alice: Authentication Response Bob->L: Log transaction @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art