diff --git a/CHANGELOG.md b/CHANGELOG.md
index f28ca13..61ef407 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog: @go/crypto
 
+## v1.5.5 (2026-07-18)
+- **确定性密钥修复**: HKDF 首轮耗尽后使用带轮次域分离的新一轮字节流，避免 RSA 密钥生成触发 entropy limit，同时保留原有首轮输出。
+- **依赖校验修复**: 重新整理模块图并补齐 checksum。
+
 ## v1.5.4 (2026-06-21)
 - **命名规范**: SHA 缩写全大写，`Sha1`/`Sha256`/`Sha512` → `SHA1`/`SHA256`/`SHA512`，HMAC 系列同步修正为 `HMACSHA1`/`HMACSHA256`/`HMACSHA512`。
 
diff --git a/TEST.md b/TEST.md
index bfc583b..6b6fb2a 100644
--- a/TEST.md
+++ b/TEST.md
@@ -1,5 +1,8 @@
 # Test Report: @go/crypto
 
+## v1.5.5 验证
+- 全量测试与基准测试通过；密码派生非对称密钥回归连续运行 10 次通过。
+
 ## 📋 测试概览
 - **测试时间**: 2026-06-21
 - **测试环境**: darwin/amd64
diff --git a/go.mod b/go.mod
index 4324790..3457dbd 100644
--- a/go.mod
+++ b/go.mod
@@ -11,6 +11,6 @@ require (
 )
 
 require (
-	apigo.cc/go/rand v1.5.3
+	apigo.cc/go/rand v1.5.3 // indirect
 	golang.org/x/sys v0.45.0 // indirect
 )
diff --git a/go.sum b/go.sum
index de7e21c..d0f1cb5 100644
--- a/go.sum
+++ b/go.sum
@@ -1,12 +1,14 @@
-apigo.cc/go/cast v1.5.0 h1:UBGJtFQ8eJPMQXs37cUgqd7YQo1zI9opuSDBDmn2/pE=
-apigo.cc/go/cast v1.5.0/go.mod h1:z2GW5p5WCZGEqVVIJUdhl232vRbLf2Qu4EDlEakX/D8=
-apigo.cc/go/encoding v1.5.0 h1:EJNdRVDOMoI2DAvZwQNQTbYuqB/6zsEzvg7lS5pQI+I=
-apigo.cc/go/encoding v1.5.0/go.mod h1:8++NfZj3hWig0qh2g7GQRw/4LpSvCYMWUZ+8J+x58cA=
-apigo.cc/go/jsmod v1.5.0 h1:JgQtJNiJWy1NOP9AzE8NX5VXJkpO/x3GqLsCCSny5Ec=
-apigo.cc/go/jsmod v1.5.0/go.mod h1:bmyeZtOAP/j5am+YRnaiM89smysK24K7ebk0koFtsSw=
-apigo.cc/go/rand v1.5.0 h1:1o8hh8fhdBuk1/h02IvugvamuT3dkWbVJrqEJVQKB2E=
-apigo.cc/go/rand v1.5.0/go.mod h1:Lh98S2dm9UY0X+M+kNQQEKyXHG5pcCKSFPyXN0QCGdk=
-apigo.cc/go/safe v1.5.0 h1:W1NblmcU8cex1f9Y5z8mNLUJOzZTE1s6fszb3FbhGnk=
-apigo.cc/go/safe v1.5.0/go.mod h1:OfQ5d6COePSGEuPvMeOk6KagX2sezw7nvKh7exj9SeM=
+apigo.cc/go/cast v1.5.3 h1:jk6VX0rGFhjKtfPhsaV6IKYpiGmORRk9qPTtuNS53tw=
+apigo.cc/go/cast v1.5.3/go.mod h1:GMjjrYn93tWat1U409G7h1jR3ejfLLI7r0efBo9Sbd4=
+apigo.cc/go/encoding v1.5.4 h1:Fk8TrveZATyy8SHukC4ZiqdTSp+QIfsRHtt55xmMK7w=
+apigo.cc/go/encoding v1.5.4/go.mod h1:dShEsZ3gKqBINz7TSOYf4e7/fBCqCY9VzlenoGUQUFM=
+apigo.cc/go/jsmod v1.5.3 h1:S3W317bH0QV2NMeRO1E0v6ySIBOfMWYv/NuQJbvqKWU=
+apigo.cc/go/jsmod v1.5.3/go.mod h1:bmyeZtOAP/j5am+YRnaiM89smysK24K7ebk0koFtsSw=
+apigo.cc/go/rand v1.5.3 h1:O4bPIwyaOWEBCr0nL9A4G4qG48AqiGTCzfPeckm3Ius=
+apigo.cc/go/rand v1.5.3/go.mod h1:q1BTFkY/cXE229dDD5Q22lF7T0DoKPV6xAu+6bCrDH4=
+apigo.cc/go/safe v1.5.2 h1:EnuEOW/SGwf/5A0nw9LnqfKJE071+TIc6ez8HI9R9Lg=
+apigo.cc/go/safe v1.5.2/go.mod h1:2GqCCLLGex4OAhdET3iBWm1R+LIYtmTrvHP8W0iESSw=
 golang.org/x/crypto v0.52.0 h1:RMs7fP2rXdep0CftQlK8Uf+kibLm7qkCcradZWYz988=
+golang.org/x/crypto v0.52.0/go.mod h1:1QgfPxDqh0T2M/elOJtp9RvuR95kVjir0e6/BvEmGbc=
 golang.org/x/sys v0.45.0 h1:dO4czNzziLiiXplLQgBCEpCvXQ3dnkn0SdaZSYdQ+FY=
+golang.org/x/sys v0.45.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
diff --git a/password.go b/password.go
index e1cb27b..1d074de 100644
--- a/password.go
+++ b/password.go
@@ -2,6 +2,7 @@ package crypto
 
 import (
 	"crypto/sha256"
+	"encoding/binary"
 	"io"
 
 	"apigo.cc/go/safe"
@@ -26,5 +27,45 @@ func DeriveKey(password, salt []byte, keyLen uint32) []byte {
 // NewDeterministicReader creates an io.Reader that produces a deterministic stream of bytes from a seed.
 // This is used to make RSA/ECDSA key generation deterministic based on a password.
 func NewDeterministicReader(seed []byte, info []byte) io.Reader {
-	return hkdf.New(sha256.New, seed, nil, info)
+	return newExpandingHKDFReader(seed, info)
+}
+
+type expandingHKDFReader struct {
+	seed    []byte
+	info    []byte
+	round   uint64
+	current io.Reader
+}
+
+func newExpandingHKDFReader(seed, info []byte) io.Reader {
+	r := &expandingHKDFReader{
+		seed: append([]byte(nil), seed...),
+		info: append([]byte(nil), info...),
+	}
+	r.reset()
+	return r
+}
+
+func (r *expandingHKDFReader) reset() {
+	info := r.info
+	if r.round > 0 {
+		info = make([]byte, len(r.info)+8)
+		copy(info, r.info)
+		binary.BigEndian.PutUint64(info[len(r.info):], r.round)
+	}
+	r.current = hkdf.New(sha256.New, r.seed, nil, info)
+	r.round++
+}
+
+func (r *expandingHKDFReader) Read(p []byte) (int, error) {
+	total := 0
+	for total < len(p) {
+		n, err := r.current.Read(p[total:])
+		total += n
+		if err == nil {
+			continue
+		}
+		r.reset()
+	}
+	return total, nil
 }