docs: API documentation fixes

Change-Id: I1088a156c9ac055f974900454647dcb9a7b7ec54
Refs: #3210
diff --git a/src/security/pib-impl.hpp b/src/security/pib-impl.hpp
index 080dc48..90e7dfc 100644
--- a/src/security/pib-impl.hpp
+++ b/src/security/pib-impl.hpp
@@ -274,7 +274,7 @@
   getCertificatesOfKey(const Name& identity, const name::Component& keyId) const = 0;
 
   /**
-   * @brief Set a cert with name @p certName as the default of a key with id @keyId of @identity.
+   * @brief Set a cert with name @p certName as the default of a key with id @p keyId of @p identity.
    *
    * @param identity The name of the belonging identity.
    * @param keyId The key id.
@@ -286,7 +286,7 @@
                              const Name& certName) = 0;
 
   /**
-   * @brief Get the default certificate of a key with id @keyId of @identity.
+   * @brief Get the default certificate of a key with id @p keyId of @p identity.
    *
    * @param identity The name of the belonging identity.
    * @param keyId The key id.