QR Code is two-dimensional image that represents the data, particularly data-shaped teks. QR Code is an evolution of the first one-dimensional barcode into two dimentions. QR Code has the ability to store much more data than a barcode. One of the important data in the campus are collegers certificate. It is a document that serves as proof of authenticity that someone has undergone a formal education stage and successfully pass the exam. The collegers certificate conventionally used today is a collegers certificate in physical form so that there is the possibility of lost or damaged. Conventional collegers certificate verification process is difficult because the process is carried out only by the manufacturer of collegers certificate. The means used to verify the authenticity of the data collegers certificate today is to make direct contact to the manufacturer's certificate regarding authenticity certificate holder, as well as the legalization process tertandatangan of collegers certificate maker. From the conduct of research and testing conducted it can be concluded that: QRCode can be used to accommodate large data information of graduate, Facilitate the detection of the authenticity of the certificate of ownership information from mobile devices, also QRCode can be quickly used to verify the certificates quickly and accurately

The improved technology in information security, now day has been being still developed. This, cause of the object called data which still has an important role in communications. There are two kinds of security technique, they are called steganography and cryptography. This paper will discuss growth of steganography technique from 2015 to 2019. The data obtained from journals and identified as a systematic literature review. The results are that improvement in steganography still developed by modifying the algorithm, combining the method and threating at parallel processing. Future, utilization of steganography is still needed, considered that communication channels are growing fast and sophisticated.

The aim of this work is designing a safe online payment activities scheme using steganography techniques with stegblock concept. These works are implemented at the computers network layers. The stegblock will convert the transactions data which sent among network into other data’s form, it means the data such as ID Number, Account Number, Passwords and others are converted with other data called cover. Finally, the system sends the cover without the real data, it just represented data and able to read by the receiver. The result shows that this design provides data security, undetectability, and integrity for payment transactions using networks.

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Pengamaman informasi sudah menjadi hal yang wajib dalam era revolusi teknologi informasi. Penggunaan internet dalam perangkan cerdas dan multiplatform akan menjadi celah bagi kriptanalis untuk mencurangi informasi. Kriptografi adalah salah satu teknik pengamanan informasi yang hingga saat ini memiliki banyak metode didalamnya. Meskipun demikian, informasi yang sandikan akan tetap memiliki celah kelemahan. Penggabungan teknik kriptogarfi dengan metode fuzzy banyak diusulkan dalam rangka peningkatan kualitas informsi yang disandikan. Dengan melakukan penelusuran sistematis literatur, ditemukan beberapa artikel yang mulai menggabungkan kriptografi dan fuzzy. Penelusiran ini bertujuan untuk melihat bagaimana peranan fuzzy dalam bidang kriptografi. Hasil yang diperoleh adalah adanya peningkatan kualitas bentuk pengamanan informsi yang dipadukan dengan fuzzy melalui beberapa cara. Selain itu, penggunaan fuzzy juga tidak terbatas dalam peningkatan keamanan. Fuzzy juga berperan dalam pemilihan kunci dan password terbaik serta penerbitan angka acak dari sebuah PRNG.