diff --git a/index.js b/index.js
index 0feb85b..0deb78b 100644
--- a/index.js
+++ b/index.js
@@ -4,6 +4,7 @@ const ethUtil = require('@ethereumjs/util');
 const sigUtil = require('@metamask/eth-sig-util');
 const { keccak256 } = require('ethereum-cryptography/keccak');
 const { getRandomBytesSync } = require('ethereum-cryptography/random');
+const { computeAllInputs } = require('plume-sig');
 
 const type = 'Simple Key Pair';
 
@@ -128,6 +129,26 @@ class SimpleKeyring extends EventEmitter {
     return Promise.resolve(sig);
   }
 
+  // For eth_getPlumeSignature:
+  signPlumeMessage(address, msgUtf8, opts = {}) {
+    const privKey = this.getPrivateKeyFor(address, opts);
+    const { plume, s, publicKey, c, gPowR, hashMPKPowR } = computeAllInputs(
+      msgUtf8,
+      privKey,
+      undefined,
+      2,
+    );
+    const signedPlume = {
+      plume: `0x${plume.toHex(true)}`,
+      publicKey: `0x${Buffer.from(publicKey).toString('hex')}`,
+      hashMPKPowR: `0x${hashMPKPowR.toHex(true)}`,
+      gPowR: `0x${gPowR.toHex(true)}`,
+      c: `0x${c}`,
+      s: `0x${s}`,
+    };
+    return Promise.resolve(signedPlume);
+  }
+
   // For eth_decryptMessage:
   decryptMessage(withAccount, encryptedData) {
     const wallet = this._getWalletForAccount(withAccount);
diff --git a/package.json b/package.json
index 2b92c55..d70823e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rabby-wallet/eth-simple-keyring",
-  "version": "5.0.1",
+  "version": "5.1.0",
   "description": "A simple standard interface for a series of Ethereum private keys.",
   "keywords": [
     "ethereum",
@@ -39,6 +39,7 @@
     "ethereumjs-tx": "^2.1.2",
     "ethereumjs-util": "^7.0.9",
     "ethereumjs-wallet": "^1.0.2",
+    "plume-sig": "^2.0.3",
     "randombytes": "^2.1.0"
   },
   "devDependencies": {
diff --git a/test/index.js b/test/index.js
index d14636b..d7a78f9 100644
--- a/test/index.js
+++ b/test/index.js
@@ -7,6 +7,7 @@ const sigUtil = require('eth-sig-util');
 const { Transaction: EthereumTx } = require('ethereumjs-tx');
 const { TransactionFactory } = require('@ethereumjs/tx');
 const { expect } = require('chai');
+const { isHexString } = require('ethereumjs-util');
 const SimpleKeyring = require('..');
 
 const TYPE_STR = 'Simple Key Pair';
@@ -161,6 +162,32 @@ describe('simple-keyring', () => {
     });
   });
 
+  describe('#signPlumeMessage', () => {
+    const privateKey =
+      '0x7dd98753d7b4394095de7d176c58128e2ed6ee600abe97c9f6d9fd65015d9b18';
+
+    it('reliably generates PLUMEs', async () => {
+      const localMessage = 'hello there!';
+
+      await keyring.deserialize([privateKey]);
+      await keyring.addAccounts(9);
+      const addresses = await keyring.getAccounts();
+      const signatures = await Promise.all(
+        addresses.map(async (accountAddress) => {
+          return await keyring.signPlumeMessage(accountAddress, localMessage);
+        }),
+      );
+      signatures.forEach((sig) => {
+        assert(isHexString(sig.plume));
+        assert(isHexString(sig.publicKey));
+        assert(isHexString(sig.hashMPKPowR));
+        assert(isHexString(sig.gPowR));
+        assert(isHexString(sig.c));
+        assert(isHexString(sig.s));
+      });
+    });
+  });
+
   describe('#addAccounts', () => {
     describe('with no arguments', () => {
       it('creates a single wallet', async () => {
diff --git a/yarn.lock b/yarn.lock
index 0653e87..5b5f269 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -309,6 +309,11 @@
   resolved "https://registry.yarnpkg.com/@bcoe/v8-coverage/-/v8-coverage-0.2.3.tgz#75a2e8b51cb758a7553d6804a5932d7aace75c39"
   integrity sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==
 
+"@colors/colors@1.5.0":
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/@colors/colors/-/colors-1.5.0.tgz#bb504579c1cae923e6576a4f5da43d25f97bdbd9"
+  integrity sha512-ooWCrlZP11i8GImSjTHYHLkvFDP48nS4+204nGb1RiX/WXYHmJA2III9/e2DWVabCESdW7hBAEzHRqUn9OUVvQ==
+
 "@eslint/eslintrc@^0.4.2":
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-0.4.2.tgz#f63d0ef06f5c0c57d76c4ab5f63d3835c51b0179"
@@ -679,6 +684,11 @@
   resolved "https://registry.yarnpkg.com/@noble/hashes/-/hashes-1.3.2.tgz#6f26dbc8fbc7205873ce3cee2f690eba0d421b39"
   integrity sha512-MVC8EAQp7MvEcm30KWENFjgR+Mkmf+D189XJTkFIlwohU5hcBbn1ZkKq7KVTi2Hme3PMGF390DaL52beVrIihQ==
 
+"@noble/secp256k1@^1.7.0":
+  version "1.7.1"
+  resolved "https://registry.yarnpkg.com/@noble/secp256k1/-/secp256k1-1.7.1.tgz#b251c70f824ce3ca7f8dc3df08d58f005cc0507c"
+  integrity sha512-hOUk6AyBFmqVrv7k5WAw/LpszxVbj9gGN4JRkIX52fdFAj1UA61KXmZDvqVEm+pOyec3+fIeZB02LYa/pWOArw==
+
 "@nodelib/fs.scandir@2.1.5":
   version "2.1.5"
   resolved "https://registry.yarnpkg.com/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz#7619c2eb21b25483f6d167548b4cfd5a7488c3d5"
@@ -1057,6 +1067,13 @@ ajv@^8.0.1:
     require-from-string "^2.0.2"
     uri-js "^4.2.2"
 
+amcl-js@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/amcl-js/-/amcl-js-3.1.0.tgz#96ed3c7b18f91bf9ac991843ec9dff45a1ced744"
+  integrity sha512-36dd2w+cqK2NPww9w3ATPqbUeFgDHyTgeyXAk9jd7PXQh3uqSIdjiVCiqijIyAMDCzlkXdotkr8Sv0nmd1/UMQ==
+  dependencies:
+    prompt "^1.0.0"
+
 ansi-colors@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/ansi-colors/-/ansi-colors-4.1.1.tgz#cbb9ae256bf750af1eab344f229aa27fe94ba348"
@@ -1186,6 +1203,18 @@ astral-regex@^2.0.0:
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-2.0.0.tgz#483143c567aeed4785759c0865786dc77d7d2e31"
   integrity sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==
 
+async@3.2.3:
+  version "3.2.3"
+  resolved "https://registry.yarnpkg.com/async/-/async-3.2.3.tgz#ac53dafd3f4720ee9e8a160628f18ea91df196c9"
+  integrity sha512-spZRyzKL5l5BZQrr/6m/SqFdBN0q3OCI0f9rjfBzCMBIP4p75P620rR3gTmaksNOhmzgdxcaxdNfMy6anrbM0g==
+
+async@^2.6.4:
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
+  integrity sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==
+  dependencies:
+    lodash "^4.17.14"
+
 asynckit@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"
@@ -1544,6 +1573,11 @@ colorette@^1.2.2:
   resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.2.tgz#cbcc79d5e99caea2dbf10eb3a26fd8b3e6acfa94"
   integrity sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==
 
+colors@1.0.x:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/colors/-/colors-1.0.3.tgz#0433f44d809680fdeb60ed260f1b0c262e82a40b"
+  integrity sha512-pFGrxThWcWQ2MsAz6RtgeWe4NK2kUE1WfsrvvlctdII745EW9I0yflqhe7++M5LEc7bV2c/9/5zc8sFcpL0Drw==
+
 combined-stream@^1.0.6, combined-stream@^1.0.8, combined-stream@~1.0.6:
   version "1.0.8"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.8.tgz#c3d45a8b34fd730631a110a8a2520682b31d5a7f"
@@ -1630,6 +1664,11 @@ cssstyle@^2.3.0:
   dependencies:
     cssom "~0.3.6"
 
+cycle@1.0.x:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/cycle/-/cycle-1.0.3.tgz#21e80b2be8580f98b468f379430662b046c34ad2"
+  integrity sha512-TVF6svNzeQCOpjCqsy0/CSy8VgObG3wXusJ73xW2GbG5rGx7lC8zxDSURicsXI2UsGdi2L0QNRCi745/wUDvsA==
+
 dashdash@^1.12.0:
   version "1.14.1"
   resolved "https://registry.yarnpkg.com/dashdash/-/dashdash-1.14.1.tgz#853cfa0f7cbe2fed5de20326b8dd581035f6e2f0"
@@ -2305,6 +2344,11 @@ extsprintf@^1.2.0:
   resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.4.0.tgz#e2689f8f356fad62cca65a3a91c5df5f9551692f"
   integrity sha1-4mifjzVvrWLMplo6kcXfX5VRaS8=
 
+eyes@0.1.x:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/eyes/-/eyes-0.1.8.tgz#62cf120234c683785d902348a800ef3e0cc20bc0"
+  integrity sha512-GipyPsXO1anza0AOZdy69Im7hGFCNB7Y/NGjDlZGJ3GJJLtwNSb2vrzYrTYJRrRloVx7pl+bhUaTB8yiccPvFQ==
+
 fast-deep-equal@^3.1.1, fast-deep-equal@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz#3a7d56b559d6cbc3eb512325244e619a65c6c525"
@@ -2946,7 +2990,7 @@ isexe@^2.0.0:
   resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
   integrity sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=
 
-isstream@~0.1.2:
+isstream@0.1.x, isstream@~0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
   integrity sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=
@@ -3416,6 +3460,11 @@ jest@^27.0.6:
     import-local "^3.0.2"
     jest-cli "^27.0.6"
 
+js-sha256@^0.10.1:
+  version "0.10.1"
+  resolved "https://registry.yarnpkg.com/js-sha256/-/js-sha256-0.10.1.tgz#b40104ba1368e823fdd5f41b66b104b15a0da60d"
+  integrity sha512-5obBtsz9301ULlsgggLg542s/jqtddfOpV5KJc4hajc9JV8GeY2gZHSVpYBn4nWqAUTJ9v+xwtbJ1mIBgIH5Vw==
+
 js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
@@ -3615,7 +3664,7 @@ lodash.truncate@^4.4.2:
   resolved "https://registry.yarnpkg.com/lodash.truncate/-/lodash.truncate-4.4.2.tgz#5a350da0b1113b837ecfffd5812cbe58d6eae193"
   integrity sha1-WjUNoLERO4N+z//VgSy+WNbq4ZM=
 
-lodash@^4.7.0:
+lodash@^4.17.14, lodash@^4.7.0:
   version "4.17.21"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
   integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
@@ -3741,6 +3790,11 @@ ms@2.1.2, ms@^2.1.1:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
   integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
 
+mute-stream@~0.0.4:
+  version "0.0.8"
+  resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.8.tgz#1630c42b2251ff81e2a283de96a5497ea92e5e0d"
+  integrity sha512-nnbWWOkoWyUsTjKrhgD0dcz22mdkSnpYqbEjIm2nhwhuxlSkpywJmBo8h0ZqJdkp73mb90SssHkN4rsRaBAfAA==
+
 nan@^2.14.0:
   version "2.14.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
@@ -4097,6 +4151,15 @@ pkg-up@^2.0.0:
   dependencies:
     find-up "^2.1.0"
 
+plume-sig@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/plume-sig/-/plume-sig-2.0.3.tgz#579a0c16551b317b7877a769791ce1c8ee75c8dd"
+  integrity sha512-RHe5Cfa3ZRUQcJoQRWfkMWHKoTsB00vcWKt44LWb5VHTvLILpTiZg666klGNEser0J+z3k01mN5GUw9bwhCYHw==
+  dependencies:
+    "@noble/secp256k1" "^1.7.0"
+    amcl-js "^3.1.0"
+    js-sha256 "^0.10.1"
+
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
@@ -4161,6 +4224,17 @@ progress@^2.0.0:
   resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.3.tgz#7e8cf8d8f5b8f239c1bc68beb4eb78567d572ef8"
   integrity sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA==
 
+prompt@^1.0.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/prompt/-/prompt-1.3.0.tgz#b1f6d47cb1b6beed4f0660b470f5d3ec157ad7ce"
+  integrity sha512-ZkaRWtaLBZl7KKAKndKYUL8WqNT+cQHKRZnT4RYYms48jQkFw3rrBL+/N5K/KtdEveHkxs982MX2BkDKub2ZMg==
+  dependencies:
+    "@colors/colors" "1.5.0"
+    async "3.2.3"
+    read "1.0.x"
+    revalidator "0.1.x"
+    winston "2.x"
+
 prompts@^2.0.1:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/prompts/-/prompts-2.4.1.tgz#befd3b1195ba052f9fd2fde8a486c4e82ee77f61"
@@ -4226,6 +4300,13 @@ read-pkg@^3.0.0:
     normalize-package-data "^2.3.2"
     path-type "^3.0.0"
 
+read@1.0.x:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/read/-/read-1.0.7.tgz#b3da19bd052431a97671d44a42634adf710b40c4"
+  integrity sha512-rSOKNYUmaxy0om1BNjMN4ezNT6VKK+2xF4GBhc81mkH7L60i6dp8qPYrkndNLT3QPphoII3maL9PVC9XmhHwVQ==
+  dependencies:
+    mute-stream "~0.0.4"
+
 readable-stream@^2.0.6:
   version "2.3.7"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.7.tgz#1eca1cf711aef814c04f62252a36a62f6cb23b57"
@@ -4322,6 +4403,11 @@ reusify@^1.0.4:
   resolved "https://registry.yarnpkg.com/reusify/-/reusify-1.0.4.tgz#90da382b1e126efc02146e90845a88db12925d76"
   integrity sha512-U9nH88a3fc/ekCF1l0/UP1IosiuIjyTh7hBvXVMHYgVcfGvt897Xguj2UOLDeI5BG2m7/uwyaLVT6fbtCwTyzw==
 
+revalidator@0.1.x:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/revalidator/-/revalidator-0.1.8.tgz#fece61bfa0c1b52a206bd6b18198184bdd523a3b"
+  integrity sha512-xcBILK2pA9oh4SiinPEZfhP8HfrB/ha+a2fTMyl7Om2WjlDVrOQy99N2MXXlUHqGJz4qEu2duXxHJjDWuK/0xg==
+
 rimraf@^3.0.0, rimraf@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-3.0.2.tgz#f1a5402ba6220ad52cc1282bac1ae3aa49fd061a"
@@ -4565,6 +4651,11 @@ sshpk@^1.7.0:
     safer-buffer "^2.0.2"
     tweetnacl "~0.14.0"
 
+stack-trace@0.0.x:
+  version "0.0.10"
+  resolved "https://registry.yarnpkg.com/stack-trace/-/stack-trace-0.0.10.tgz#547c70b347e8d32b4e108ea1a2a159e5fdde19c0"
+  integrity sha512-KGzahc7puUKkzyMt+IqAep+TVNbKP+k2Lmwhub39m1AsTSkaDutx56aDCo+HLDzf/D26BIHTJWNiTG1KAJiQCg==
+
 stack-utils@^2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/stack-utils/-/stack-utils-2.0.3.tgz#cd5f030126ff116b78ccb3c027fe302713b61277"
@@ -5050,6 +5141,18 @@ wide-align@^1.1.0:
   dependencies:
     string-width "^1.0.2 || 2"
 
+winston@2.x:
+  version "2.4.7"
+  resolved "https://registry.yarnpkg.com/winston/-/winston-2.4.7.tgz#5791fe08ea7e90db090f1cb31ef98f32531062f1"
+  integrity sha512-vLB4BqzCKDnnZH9PHGoS2ycawueX4HLqENXQitvFHczhgW2vFpSOn31LZtVr1KU8YTw7DS4tM+cqyovxo8taVg==
+  dependencies:
+    async "^2.6.4"
+    colors "1.0.x"
+    cycle "1.0.x"
+    eyes "0.1.x"
+    isstream "0.1.x"
+    stack-trace "0.0.x"
+
 word-wrap@^1.2.3, word-wrap@~1.2.3:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/word-wrap/-/word-wrap-1.2.3.tgz#610636f6b1f703891bd34771ccb17fb93b47079c"