Base code 64 decode online dating
To convert data to PEM printable encoding, the first byte is placed in the most significant eight bits of a 24-bit buffer, the next in the middle eight, and the third in the least significant eight bits.If there are fewer than three bytes left to encode (or in total), the remaining buffer bits will be zero.The general strategy is to choose 64 characters that are both members of a subset common to most encodings, and also printable.This combination leaves the data unlikely to be modified in transit through information systems, such as email, that were traditionally not 8-bit clean. Other variations share this property but differ in the symbols chosen for the last two values; an example is UTF-7.If three octets remain, they are processed normally.If fewer than three octets (24 bits) are remaining to encode, the input data is right-padded with zero bits to form an integral multiple of six bits.
The particular set of 64 characters chosen to represent the 64 place-values for the base varies between implementations.After encoding the non-padded data, if two octets of the 24-bit buffer are padded-zeros, two "" character is appended.This signals the decoder that the zero bits added due to padding should be excluded from the reconstructed data.The first known standardized use of the encoding now called MIME Base64 was in the Privacy-enhanced Electronic Mail (PEM) protocol, proposed by RFC 989 in 1987.PEM defines a "printable encoding" scheme that uses Base64 encoding to transform an arbitrary sequence of octets to a format that can be expressed in short lines of 6-bit characters, as required by transfer protocols such as SMTP." symbol to delimit encoded but unencrypted data within the output stream.