/Knowledge/sources/honojs__hono/llms-full/cookie-helper-usage-signed-cookies--3a097e0df02d.md
Cookie Helper: Usage > Signed cookies - hono-docs
Cookie Helper: Usage Signed cookies Source evidence: /Sources/honojs hono/provenance.md Canonical citation: https://hono.dev/llms full.txt signed cookies Sum...
Cookie Helper: Usage > Signed cookies
Source evidence: /Sources/honojs__hono/provenance.md Canonical citation: https://hono.dev/llms-full.txt#signed-cookies
Summary
NOTE: Setting and retrieving signed cookies returns a Promise due to the async nature of the WebCrypto API, which is used to create HMAC SHA-256 signatures. ```ts app.get('/signed-cookie', (c) => { const secret = 'secret' // make sur...
Content
NOTE: Setting and retrieving signed cookies returns a Promise due to the async nature of the WebCrypto API, which is used to create HMAC SHA-256 signatures.
app.get('/signed-cookie', (c) => {
const secret = 'secret' // make sure it's a large enough string to be secure
await setSignedCookie(c, 'cookie_name0', 'cookie_value', secret)
const fortuneCookie = await getSignedCookie(
c,
secret,
'cookie_name0'
)
deleteCookie(c, 'cookie_name0')
// `getSignedCookie` will return `false` for a specified cookie if the signature was tampered with or is invalid
const allSignedCookies = await getSignedCookie(c, secret)
// ...
})
Metadata
{
"chunk_index": 0,
"citation": "https://hono.dev/llms-full.txt#signed-cookies",
"coverage_role": "overview",
"qualified_title": "Hono / llms-full / Cookie Helper > Usage > Signed cookies",
"retrieved_at": "2026-07-02T05:51:01Z",
"section_index": 718,
"source_id": "/honojs/hono",
"source_type": "llms_full",
"target_label": "llms-full",
"title": "Cookie Helper: Usage > Signed cookies",
"upstream_url": "https://hono.dev/llms-full.txt",
"version": "2026"
}
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