diff --git a/attestation/material/material.go b/attestation/material/material.go
index 801289ac..84394d33 100644
--- a/attestation/material/material.go
+++ b/attestation/material/material.go
@@ -47,15 +47,15 @@ type Attestor struct {
 	materials map[string]cryptoutil.DigestSet
 }
 
-func (a Attestor) Name() string {
+func (a *Attestor) Name() string {
 	return Name
 }
 
-func (a Attestor) Type() string {
+func (a *Attestor) Type() string {
 	return Type
 }
 
-func (rc *Attestor) RunType() attestation.RunType {
+func (a *Attestor) RunType() attestation.RunType {
 	return RunType
 }
 
diff --git a/attestation/product/product.go b/attestation/product/product.go
index 81a9a7da..3ef24571 100644
--- a/attestation/product/product.go
+++ b/attestation/product/product.go
@@ -125,15 +125,15 @@ func fromDigestMap(digestMap map[string]cryptoutil.DigestSet) map[string]attesta
 	return products
 }
 
-func (a Attestor) Name() string {
+func (a *Attestor) Name() string {
 	return Name
 }
 
-func (a Attestor) Type() string {
+func (a *Attestor) Type() string {
 	return Type
 }
 
-func (rc *Attestor) RunType() attestation.RunType {
+func (a *Attestor) RunType() attestation.RunType {
 	return RunType
 }
 
diff --git a/attestation/product/product_test.go b/attestation/product/product_test.go
index ece998d9..76502b74 100644
--- a/attestation/product/product_test.go
+++ b/attestation/product/product_test.go
@@ -36,7 +36,8 @@ func TestFromDigestMap(t *testing.T) {
 	testDigestSet["test"] = testDigest
 	result := fromDigestMap(testDigestSet)
 	assert.Len(t, result, 1)
-	assert.True(t, result["test"].Digest.Equal(testDigest))
+	digest := result["test"].Digest
+	assert.True(t, digest.Equal(testDigest))
 }
 
 func TestAttestorName(t *testing.T) {
diff --git a/cryptoutil/digestset.go b/cryptoutil/digestset.go
index d97ef70a..ec291da4 100644
--- a/cryptoutil/digestset.go
+++ b/cryptoutil/digestset.go
@@ -96,9 +96,9 @@ func HashFromString(name string) (crypto.Hash, error) {
 // Equal returns true if every digest for hash functions both artifacts have in common are equal.
 // If the two artifacts don't have any digests from common hash functions, equal will return false.
 // If any digest from common hash functions differ between the two artifacts, equal will return false.
-func (first DigestSet) Equal(second DigestSet) bool {
+func (ds *DigestSet) Equal(second DigestSet) bool {
 	hasMatchingDigest := false
-	for hash, digest := range first {
+	for hash, digest := range *ds {
 		otherDigest, ok := second[hash]
 		if !ok {
 			continue
@@ -114,9 +114,9 @@ func (first DigestSet) Equal(second DigestSet) bool {
 	return hasMatchingDigest
 }
 
-func (ds DigestSet) ToNameMap() (map[string]string, error) {
+func (ds *DigestSet) ToNameMap() (map[string]string, error) {
 	nameMap := make(map[string]string)
-	for hash, digest := range ds {
+	for hash, digest := range *ds {
 		name, ok := hashNames[hash]
 		if !ok {
 			return nameMap, ErrUnsupportedHash(hash.String())
diff --git a/registry/option.go b/registry/option.go
index 71ba1669..28591008 100644
--- a/registry/option.go
+++ b/registry/option.go
@@ -37,7 +37,7 @@ type ConfigOption[T any, TOption Option] struct {
 	setter      func(T, TOption) (T, error)
 }
 
-func (co ConfigOption[T, TOption]) Name() string {
+func (co *ConfigOption[T, TOption]) Name() string {
 	if len(co.prefix) == 0 {
 		return co.name
 	}
@@ -49,15 +49,15 @@ func (co *ConfigOption[T, TOption]) SetPrefix(prefix string) {
 	co.prefix = prefix
 }
 
-func (co ConfigOption[T, TOption]) DefaultVal() TOption {
+func (co *ConfigOption[T, TOption]) DefaultVal() TOption {
 	return co.defaultVal
 }
 
-func (co ConfigOption[T, TOption]) Description() string {
+func (co *ConfigOption[T, TOption]) Description() string {
 	return co.description
 }
 
-func (co ConfigOption[T, TOption]) Setter() func(T, TOption) (T, error) {
+func (co *ConfigOption[T, TOption]) Setter() func(T, TOption) (T, error) {
 	return co.setter
 }