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Birçok kriptografik kitaplıkta anahtarlar genellikle yalnızca bazı bayt dizileriyle tanımlanır. Örneğin, EVP_EncryptInit_ex gibi OpenSSL işlevlerini düşünün. Bu işlevler, anahtar baytlarının yanı sıra hesaplama için IV'ye de ihtiyaç duyar. Ya da hem anahtar dizisi hem de AlgorithmParameterSpec alan javax.crypto yöntemi Cipher.init'i düşünün. Bu tür işlevlerin doğru şekilde kullanılması genellikle zordur ve yanlış parametrelerin iletilmesinin ciddi sonuçları olabilir.
Tink farklı olmayı hedefler ve bir anahtarın her zaman hem anahtar materyalinden hem de meta verilerden (parametreler) oluşmasını bekler.
Örneğin, tam AEAD anahtarı, şifreleme ve şifre çözmenin nasıl çalıştığını tam ayrıntılarıyla belirtir.Bu anahtar, \(\mathrm{Enc}\) ve\(\mathrm{Dec}\)işlevlerini ve şifre metninin nasıl kodlandığını (ör. başlatma vektörü, şifreleme ve etiket) belirtir.
Tink'teki AES anahtarı yalnızca 128, 192 veya 256 bit uzunluğunda bir bayt dizisi değil, aynı zamanda anahtarı hesaplamak için gereken ilgili algoritma özelliklerini parametreler nesnesi biçiminde de depolar. Bu nedenle, tam AES-EAX anahtarı ve tam AES-GCM anahtarı Tink'te farklı nesnelerdir.
[null,null,["Son güncelleme tarihi: 2025-07-25 UTC."],[[["\u003cp\u003eIn Tink, a Key is a cryptographic object encompassing both key material and metadata, ensuring clear and complete functionality specification.\u003c/p\u003e\n"],["\u003cp\u003eUnlike traditional libraries, Tink Keys include necessary parameters like IV and algorithm specifications, simplifying usage and mitigating potential errors.\u003c/p\u003e\n"],["\u003cp\u003eTink Keys fully define cryptographic operations, including encryption, decryption, and ciphertext encoding, as exemplified by AEAD keys.\u003c/p\u003e\n"],["\u003cp\u003eDifferent key types with distinct algorithm specifications, like AES-EAX and AES-GCM, are treated as separate objects within Tink.\u003c/p\u003e\n"],["\u003cp\u003eTink incorporates Keys into Keysets, enabling key rotation and enhanced security practices.\u003c/p\u003e\n"]]],["Tink's **Key** includes both key material and metadata, defining its functionality. Unlike other libraries that only use byte sequences, Tink requires complete parameter specifications. A full AEAD key defines encryption and decryption processes, along with ciphertext encoding. AES keys in Tink include algorithm specifications, making different AES types distinct objects. Keys in Tink exist as parts of a set of keys called a Keyset, allowing key rotation.\n"],null,["# Keys\n\n| In Tink, a **Key** describes a complete cryptographic object, and consists of the key material plus all necessary metadata which describes its functionality.\n\nIn many cryptographic libraries, keys are often identified by only some byte\nsequences. Consider for example OpenSSL functions such as `EVP_EncryptInit_ex`,\nwhich apart from the key bytes, also needs the IV for computation; or the\njavax.crypto method `Cipher.init`, which takes both a key sequence and an\n`AlgorithmParameterSpec`. Such functions are often difficult to use correctly\nand passing the wrong parameters can have serious consequences.\n\nTink aims to be different, and expects a key to always consist of both the key\nmaterial and the metadata (the parameters).\n\nA full AEAD key for example specifies in exact detail how encryption and\ndecryption works - it specifies the two functions \\\\(\\\\mathrm{Enc}\\\\) and\n\\\\(\\\\mathrm{Dec}\\\\), and how the ciphertext is encoded (e.g. initialization vector,\nfollowed by the encryption, followed by the tag).\n\nAn AES key in Tink is not only a byte sequence of length 128, 192 or 256 bits,\nbut it also stores the corresponding algorithm specifications needed to compute\nthe key, in the form of a [parameters](/tink/design/parameters) object. Hence, a\nfull AES-EAX key and a full AES-GCM key are different objects in Tink.\n| **Note:** In Tink, keys are part of a [keyset](/tink/design/keysets) - a set of keys which implement the same primitive, which facilitates key rotation."]]
