diff --git a/Cargo.toml b/Cargo.toml
index 2a4c741d..b3b0e8a1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -54,8 +54,6 @@ include = [
     "src/verify_cert.rs",
     "src/lib.rs",
 
-    "src/data/**/*",
-
     "tests/**",
 ]
 
diff --git a/src/aws_lc_rs_algs.rs b/src/aws_lc_rs_algs.rs
index 83cc76c3..d7ec3e7b 100644
--- a/src/aws_lc_rs_algs.rs
+++ b/src/aws_lc_rs_algs.rs
@@ -1,7 +1,5 @@
 use aws_lc_rs::{signature, try_fips_mode};
-use pki_types::{AlgorithmIdentifier, InvalidSignature, SignatureVerificationAlgorithm};
-
-use crate::signed_data::alg_id;
+use pki_types::{alg_id, AlgorithmIdentifier, InvalidSignature, SignatureVerificationAlgorithm};
 
 // nb. aws-lc-rs has an API that is broadly compatible with *ring*,
 // so this is very similar to ring_algs.rs.
diff --git a/src/data/README.md b/src/data/README.md
deleted file mode 100644
index 78fc7788..00000000
--- a/src/data/README.md
+++ /dev/null
@@ -1,21 +0,0 @@
-These files contain the binary DER encoding of the *values* of some
-ASN.1 [`AlgorithmIdentifier`]s, without the outer `SEQUENCE` tag or the outer
-length component.
-
-These files were encoded with the help of [der-ascii]. They can be decoded
-using:
-
-```sh
-go get github.com/google/der-ascii/cmd/der2ascii
-der2ascii -i <filename> -o <filename>.ascii
-```
-
-New or modified der-ascii files can be encoded using:
-
-```sh
-go get github.com/google/der-ascii/cmd/ascii2der
-ascii2der i <filename>.ascii -o <filename>
-```
-
-[`AlgorithmIdentifier`]: https://tools.ietf.org/html/rfc5280#section-4.1.1.2]
-[der-ascii]: https://github.com/google/der-ascii
diff --git a/src/data/alg-ecdsa-p256.der b/src/data/alg-ecdsa-p256.der
deleted file mode 100644
index d49c30da..00000000
--- a/src/data/alg-ecdsa-p256.der
+++ /dev/null
@@ -1 +0,0 @@
-*†HÎ=
*†HÎ=

\ No newline at end of file
diff --git a/src/data/alg-ecdsa-p384.der b/src/data/alg-ecdsa-p384.der
deleted file mode 100644
index 8b24916c..00000000
Binary files a/src/data/alg-ecdsa-p384.der and /dev/null differ
diff --git a/src/data/alg-ecdsa-p521.der b/src/data/alg-ecdsa-p521.der
deleted file mode 100644
index 9ad544c2..00000000
Binary files a/src/data/alg-ecdsa-p521.der and /dev/null differ
diff --git a/src/data/alg-ecdsa-sha256.der b/src/data/alg-ecdsa-sha256.der
deleted file mode 100644
index b2ee1289..00000000
--- a/src/data/alg-ecdsa-sha256.der
+++ /dev/null
@@ -1 +0,0 @@
-*†HÎ=
\ No newline at end of file
diff --git a/src/data/alg-ecdsa-sha384.der b/src/data/alg-ecdsa-sha384.der
deleted file mode 100644
index 7c61d3aa..00000000
--- a/src/data/alg-ecdsa-sha384.der
+++ /dev/null
@@ -1 +0,0 @@
-*†HÎ=
\ No newline at end of file
diff --git a/src/data/alg-ecdsa-sha512.der b/src/data/alg-ecdsa-sha512.der
deleted file mode 100644
index d87b8992..00000000
--- a/src/data/alg-ecdsa-sha512.der
+++ /dev/null
@@ -1 +0,0 @@
-*†HÎ=
\ No newline at end of file
diff --git a/src/data/alg-ed25519.der b/src/data/alg-ed25519.der
deleted file mode 100644
index 7ca46fd9..00000000
--- a/src/data/alg-ed25519.der
+++ /dev/null
@@ -1 +0,0 @@
-+ep
\ No newline at end of file
diff --git a/src/data/alg-rsa-encryption.der b/src/data/alg-rsa-encryption.der
deleted file mode 100644
index 77d159a1..00000000
Binary files a/src/data/alg-rsa-encryption.der and /dev/null differ
diff --git a/src/data/alg-rsa-pkcs1-sha256.der b/src/data/alg-rsa-pkcs1-sha256.der
deleted file mode 100644
index ab52bcd8..00000000
Binary files a/src/data/alg-rsa-pkcs1-sha256.der and /dev/null differ
diff --git a/src/data/alg-rsa-pkcs1-sha384.der b/src/data/alg-rsa-pkcs1-sha384.der
deleted file mode 100644
index c0d43b17..00000000
Binary files a/src/data/alg-rsa-pkcs1-sha384.der and /dev/null differ
diff --git a/src/data/alg-rsa-pkcs1-sha512.der b/src/data/alg-rsa-pkcs1-sha512.der
deleted file mode 100644
index 71aded5b..00000000
Binary files a/src/data/alg-rsa-pkcs1-sha512.der and /dev/null differ
diff --git a/src/data/alg-rsa-pss-sha256.der b/src/data/alg-rsa-pss-sha256.der
deleted file mode 100644
index 87328f7c..00000000
Binary files a/src/data/alg-rsa-pss-sha256.der and /dev/null differ
diff --git a/src/data/alg-rsa-pss-sha384.der b/src/data/alg-rsa-pss-sha384.der
deleted file mode 100644
index 9c3b170f..00000000
Binary files a/src/data/alg-rsa-pss-sha384.der and /dev/null differ
diff --git a/src/data/alg-rsa-pss-sha512.der b/src/data/alg-rsa-pss-sha512.der
deleted file mode 100644
index c0ad57d6..00000000
Binary files a/src/data/alg-rsa-pss-sha512.der and /dev/null differ
diff --git a/src/lib.rs b/src/lib.rs
index 3ed2a8c4..fd778d5c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -81,7 +81,6 @@ pub use {
     end_entity::EndEntityCert,
     error::{DerTypeId, Error},
     rpk_entity::RawPublicKeyEntity,
-    signed_data::alg_id,
     trust_anchor::anchor_from_trusted_cert,
     verify_cert::KeyUsage,
     verify_cert::VerifiedPath,
diff --git a/src/ring_algs.rs b/src/ring_algs.rs
index 2b1e6fd3..f02c6091 100644
--- a/src/ring_algs.rs
+++ b/src/ring_algs.rs
@@ -12,11 +12,9 @@
 // ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 // OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
-use pki_types::{AlgorithmIdentifier, InvalidSignature, SignatureVerificationAlgorithm};
+use pki_types::{alg_id, AlgorithmIdentifier, InvalidSignature, SignatureVerificationAlgorithm};
 use ring::signature;
 
-use crate::signed_data::alg_id;
-
 /// A `SignatureVerificationAlgorithm` implemented using *ring*.
 #[derive(Debug)]
 struct RingAlgorithm {
diff --git a/src/signed_data.rs b/src/signed_data.rs
index cec29252..99f65d47 100644
--- a/src/signed_data.rs
+++ b/src/signed_data.rs
@@ -16,7 +16,7 @@ use crate::der::{self, FromDer};
 use crate::error::{DerTypeId, Error};
 use crate::verify_cert::Budget;
 
-use pki_types::{AlgorithmIdentifier, SignatureVerificationAlgorithm};
+use pki_types::SignatureVerificationAlgorithm;
 
 #[cfg(feature = "alloc")]
 use alloc::vec::Vec;
@@ -249,81 +249,3 @@ impl<'a> FromDer<'a> for SubjectPublicKeyInfo<'a> {
 
     const TYPE_ID: DerTypeId = DerTypeId::SubjectPublicKeyInfo;
 }
-
-/// Encodings of the PKIX AlgorithmIdentifier type.
-///
-/// This module contains a set of common values, and exists to keep the
-/// names of these separate from the actual algorithm implementations.
-pub mod alg_id {
-    use super::AlgorithmIdentifier;
-
-    // See src/data/README.md.
-
-    /// AlgorithmIdentifier for `id-ecPublicKey` with named curve `secp256r1`.
-    pub const ECDSA_P256: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ecdsa-p256.der"));
-
-    /// AlgorithmIdentifier for `id-ecPublicKey` with named curve `secp384r1`.
-    pub const ECDSA_P384: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ecdsa-p384.der"));
-
-    /// AlgorithmIdentifier for `id-ecPublicKey` with named curve `secp521r1`.
-    pub const ECDSA_P521: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ecdsa-p521.der"));
-
-    /// AlgorithmIdentifier for `ecdsa-with-SHA256`.
-    pub const ECDSA_SHA256: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ecdsa-sha256.der"));
-
-    /// AlgorithmIdentifier for `ecdsa-with-SHA384`.
-    pub const ECDSA_SHA384: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ecdsa-sha384.der"));
-
-    /// AlgorithmIdentifier for `ecdsa-with-SHA512`.
-    pub const ECDSA_SHA512: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ecdsa-sha512.der"));
-
-    /// AlgorithmIdentifier for `rsaEncryption`.
-    pub const RSA_ENCRYPTION: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-rsa-encryption.der"));
-
-    /// AlgorithmIdentifier for `sha256WithRSAEncryption`.
-    pub const RSA_PKCS1_SHA256: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-rsa-pkcs1-sha256.der"));
-
-    /// AlgorithmIdentifier for `sha384WithRSAEncryption`.
-    pub const RSA_PKCS1_SHA384: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-rsa-pkcs1-sha384.der"));
-
-    /// AlgorithmIdentifier for `sha512WithRSAEncryption`.
-    pub const RSA_PKCS1_SHA512: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-rsa-pkcs1-sha512.der"));
-
-    /// AlgorithmIdentifier for `rsassaPss` with:
-    ///
-    /// - hashAlgorithm: sha256
-    /// - maskGenAlgorithm: mgf1 with sha256
-    /// - saltLength: 32
-    pub const RSA_PSS_SHA256: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-rsa-pss-sha256.der"));
-
-    /// AlgorithmIdentifier for `rsassaPss` with:
-    ///
-    /// - hashAlgorithm: sha384
-    /// - maskGenAlgorithm: mgf1 with sha384
-    /// - saltLength: 48
-    pub const RSA_PSS_SHA384: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-rsa-pss-sha384.der"));
-
-    /// AlgorithmIdentifier for `rsassaPss` with:
-    ///
-    /// - hashAlgorithm: sha512
-    /// - maskGenAlgorithm: mgf1 with sha512
-    /// - saltLength: 64
-    pub const RSA_PSS_SHA512: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-rsa-pss-sha512.der"));
-
-    /// AlgorithmIdentifier for `ED25519`.
-    pub const ED25519: AlgorithmIdentifier =
-        AlgorithmIdentifier::from_slice(include_bytes!("data/alg-ed25519.der"));
-}