Data Sheet

AC4490
Datasheet
https://www.lairdconnect.com/
19
© Copyright 2022 Laird Connectivity
All Rights Reserved
Americas: [phone]
Europe: [phone]
Hong Kong: [phone]
If FHSS technology, channel number, and system ID are not enough to secure your data, the AC4490 supports the Data
Encryption Standard (DES), which is the third level of security. Encryption is the process of encoding an information bit stream
to secure the data content. The algorithm described in this standard specifies both encrypting and decrypting operations which
are based on a binary number called a key.
A key of 56 bits is used to encrypt and decrypt the data. The encryption algorithm specified in this standard is commonly
known among those using the standard. The unique key chosen for use in a particular application makes the results of
encrypting data using the algorithm unique. Selection of a different key causes the encrypted data that is produced for any
given set of inputs to be different. The cryptographic security of the data depends on the security provided for the key used to
encrypt and decrypt the data.
Data can be recovered from the encrypted data only by using exactly the same key used to encrypt it. Unauthorized recipients
of the encrypted data who know the algorithm but do not have the correct key cannot derive the original data algorithmically.
However, anyone who does have the key and the algorithm can easily decrypt the encrypted data and obtain the original data.
A standard algorithm based on a secure key thus provides a basis for exchanging encrypted data by issuing the key used to
encrypt it to those authorized to have the data.