The short answer is yes, unique binary/hex values will always encode to a unique base64 encoded string. BUT, multiple base64 encoded strings may represent a single binary/hex value. This is because hex bytes are not aligned with base64 ‘digits’.

Examples of the use of the encoding specificity principle include; studying in the same room as an exam is taken and the recall of information when intoxicated being easier when intoxicated again.

Encoding modifies data from one format into another format using a scheme that is publicly available. Therefore the only difference between encoding and encryption is that encoding does not require a key. But, only the algorithm used to encode it. Yet encryption requires a key to reverse the content into plain text.

How does base64 work? Base64 encoding converts every three bytes of data (three bytes is 3*8=24 bits) into four base64 characters. Which makes up a total of three bytes (24 bits). Base64 encoding will divide the binary data up to six-bit chunks and map them to a base64 character according to the table above.

Usage. Base64 is most commonly used to encode binary data (for example, images, or sound files) for embedding into HTML, CSS, EML, and other text documents. In addition, Base64 is used to encode data that may be unsupported or damaged during transfer, storage, or output.

The final ‘==’ sequence indicates that the last group contained only one byte, and ‘=’ indicates that it contained two bytes. Thus, this is some sort of padding. No. To pad the Base64-encoded string to a multiple of 4 characters in length, so that it can be decoded correctly.

Base64 encoded isn’t encryption on any level. It’s simply encodes text for transport and can easily be reversed. You can easily encode and decode from the command line with the base64 command. No pass phrase or keys are needed.

Encoded size increase Each Base64 digit represents exactly 6 bits of data. So, three 8-bits bytes of the input string/binary file (3×8 bits = 24 bits) can be represented by four 6-bit Base64 digits (4×6 = 24 bits). The increase may be larger if the encoded data is small.

Base64 is a generic term for a number of similar encoding schemes that encode binary data by treating it numerically and translating it into a base-64 representation. The Base64 term originates from a specific MIME-content transfer encoding.

There is no encoding that “reduces size.” Encodings are just mappings of bits to the character they represent. You can compress the data with e.g. gzip, bzip2 or lzma and then run through base64 to limit the used character set. This is beneficial only on larger strings of hundreds of bytes or more.

The length of a Base64-encoded string is always a multiple of 4. Only these characters are used by the encryption: “A” to “Z”, “a” to “z”, “0” to “9”, “+” and “/” The end of a string can be padded up to two times using the “=”-character (this character is allowed in the end only)

1 Answer. Both Base64 and Base64url are ways to encode binary data in string form. The problem with Base64 is that it contains the characters + , / , and = , which have a reserved meaning in some filesystem names and URLs. So base64url solves this by replacing + with – and / with _ .

Base64 Functions in PHP The base64_encode function allows you to encode data in the MIME Base64 format. On the other hand, the base64_decode function is used to decode the MIME Base64-encoded data.

The base64_decode() is an inbuilt function in PHP which is used to Decodes data which is encoded in MIME base64. Parameters: This function accepts two parameter as mantioned above and described below: $data: It is mandatory parameter which contains the encoded string. $strict: It is an optional parameter.

The base64_encode() function is an inbuilt function in PHP which is used to Encodes data with MIME base64. MIME (Multipurpose Internet Mail Extensions) base64 is used to encode the string in base64. The base64_encoded data takes 33% more space then original data.

base64_encode ( string $string ) : string. Encodes the given string with base64. This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies. Base64-encoded data takes about 33% more space than the original data.

Try SourceGuardian encoding Feel free to try the SourceGuardian Encoder on your own code. Please paste your sample PHP code below and click the “Encode Now” button. Make sure your code is compatible with the selected version of PHP. Note: We do not store either your source or encoded files.

Images encoded with Base64 can be embedded in HTML by using the tag. This can help to increase the page load time for smaller images by saving the browser from making additional HTTP requests.

This function is convenient when encoding a string to be used in a query part of a URL.

1. Step 1 : Create function for encrypt input data. function base64_url_encode($input) { return strtr(base64_encode($input), ‘+/=’, ‘-_,’);
2. Step 2 : Create a function for decrypt input data. function base64_url_decode($input) {