Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Kunci tink terdiri dari materi kunci dan metadata. Bagian
tentang pemberian tag ciphertext
menjelaskan bagaimana Tink juga
mengizinkan memberi awalan pada ciphertext dengan string 5 byte yang berasal dari ID, yang
berarti bahwa kunci tersebut juga bergantung pada ID yang ada dalam keyset.
Oleh karena itu, untuk membuat kunci baru, Tink secara umum menggunakan bahan-bahan berikut:
Objek yang menjelaskan semua parameter
ID kunci baru
Pengacakan yang seragam dan aman secara kriptografis
Contoh
Misalnya, pertimbangkan HMAC (RFC 2014).
Untuk menentukan komputasi HMAC di Tink, seseorang perlu memberikan informasi berikut, yang membentuk kunci:
[null,null,["Terakhir diperbarui pada 2025-07-25 UTC."],[[["\u003cp\u003eTink keys comprise key material and metadata, including parameters like hash function and output length, but exclude key material randomness and key ID.\u003c/p\u003e\n"],["\u003cp\u003eCreating a new key in Tink involves using parameters, a unique key ID, and cryptographically secure random data.\u003c/p\u003e\n"],["\u003cp\u003eKey parameters in Tink encompass information used for key creation, such as hash function, output length, and key material length, but exclude the actual key material.\u003c/p\u003e\n"],["\u003cp\u003eA complete Tink key combines its parameters, key material, and a unique ID, enabling secure cryptographic operations.\u003c/p\u003e\n"]]],["Tink keys comprise key material and metadata, including a prefix derived from the key ID. To create a key, Tink uses parameters, the key's ID, and randomness. Key parameters consist of information used to create the key, excluding the key material and ID. For HMAC, parameters include key material length, hash function, output length (if truncated), and how to derive the prefix from the ID. These parameters, with the key material and ID, define the full key.\n"],null,["# Parameters\n\n| In Tink, the **parameters** of a key consist of the information which was used to create the key. This does not include the *key material randomness* and the *key ID*.\n\nTink [keys](/tink/design/keys) consist of both key material and metadata. The\nsection on tagging ciphertexts\n[explains](/tink/design/keysets#key_identifiers_in_ciphertexts) how Tink also\nallows to prefix ciphertexts with a 5-byte string derived from the ID, which\nmeans that the key also depends on the ID it has in the keyset.\n\nTherefore, to create a new key, Tink uses in general the following ingredients:\n\n- An object describing all **parameters**\n- The ID of the new key\n- Uniform, cryptographically secure randomness\n\nExample\n-------\n\nConsider for example HMAC ([RFC 2014](https://www.rfc-editor.org/rfc/rfc2104)).\nTo specify an HMAC computation in Tink, one needs to provide the following\ninformation, which form the key:\n\n- The key material of HMAC.\n- The hash function to be used.\n- The output length of the HMAC (see ([RFC 2014, Section\n 5](https://www.rfc-editor.org/rfc/rfc2104#section-5))) - if truncated.\n- The Tink specific [prefix with which every tag\n starts](/tink/design/keysets#tagging_ciphertexts) (if any).\n\nThe corresponding parameters consist of all this information, except the actual\nkey material. More specifically:\n\n- The length of the key material.\n- The hash function used.\n- The output length of the HMAC - if truncated.\n- A specification of how to find the prefix from the ID.\n\nTogether with the key material and the ID, this forms the full key. See also\nmore details on how these objects are [implemented](/tink/design/key_objects)."]]
