This figure consists of three boxes arranged horizontally:
The left box is divided into three sections vertically. These sections contain the following text, from top to bottom:
Issuer = CA2
Subject = Alice
Alice's Public Key
The last section also contains an image of a key.
The middle box is divided into three sections vertically. These sections contain the following text, from top to bottom:
Issuer = CA1
Subject = CA2
CA2's Public Key
The last section also contains an image of a key.
The right box contains the text "CA1's Public Key" and an image of a key.
Arrows connect the following boxes and sections
From "Subject = CA2" in the middle box to "Issuer = CA2" in the left box
From "CA1's Public Key" in the right box to "Issuer = CA1" in the middle box.