Signid

Signid is a tiny node.js server-side library for signing and verifying integer identifiers. Identifiers can be signed to prevent a prediction of next values.

Look at how simple it is:

const Signid = require('signid')
const signid = new Signid('Your secret key')

const signed = signid.encode(18082)
console.log(signed) // '1tkblhp-dya'

const originalId = signid.decode(signed)
console.log(originalId) // 18082

const signid2 = new Signid('Incorrect secret')
const originalId2 = signid2.decode(signed)
console.log(originalId2) // null

Note that this is not an encryption library and is not suitable for creating something safe. It doesn't withstand any security requirements.

Features

• Server-side code (uses node crypto md5)
• Simple usage
• Signed integer as string about (7-20 chars length)
• Supports positive integers only (0 - Number.MAX_SAFE_INTEGER)

Install

Using NPM:

npm i signid

Signed identifiers example

| ID | Signed | |----|--------| | 0 | 'fmh1hp-0' | | 1 | '1invht9-1' | | 2 | 'j3c2f3-2' | | 3 | '1tp4u3p-3' | | 100 | '1f9pfif-2s' | | 1000 | '1ekln37-rs' | | 1001 | '1b3b3xt-rt' | | 1002 | '105opf1-ru' | | 88888 | '1buzr2q-1wl4' | | 9007199254740991 | 'iim0na-2gosa7pa2gv' (Number.MAX_SAFE_INTEGER) |

P.S. This table is generated with secret Your secret